42results about How to "Increase available nutrient content" patented technology

The invention discloses a crop straw decomposition agent. The crop straw decomposition agent is composed of the following components by mass percent: 20%-30% of bacillus subtilis, 20%-30% of aspergillus niger, 10%-15% of candida utilis, 15%-20% of trichoderma viride, 10%-15% of aspergillus oryzae and 1%-2% of cellulase. In order to solve the problems such that current straws are directly returned to fields, and the temperature rise is slow, the decomposition is slow and the decomposition effect is poor when the straws are used for composting an organic fertilizer, crop straw decomposition is tested for a plurality of years, microorganism strains and biological enzyme preparations are continuously screened, and finally, the bacillus subtilis, the aspergillus niger, the candida utilis, the trichoderma viride, the aspergillus oryzae and the cellulase are prepared into the crop straw decomposition agent according to the scheme. The four fungi are not antagonistic and combined with the cellulase to have a synergistic interaction effect and the straws can be rapidly decomposed.

The invention discloses a production method for a compound microbial manure, which mainly includes the following steps: (1) preparation of microbial agent: nitrogen-fixing bacteria, phosphate-solubilizing bacteria and potassium-solubilizing bacteria as strains are mixed according to the weight ratio of 2:1:1, so that the microbial agent is prepared; (2) primary microbial agent fermentation: the microbial agent, waste distiller's grain liquid, soybean meal, rice bran and quail feces are mixed according to proportion, so that compound quail feces is prepared; (3) secondary aerobic fermentation: the compound quail feces, distiller's grain, wheat bran and straw powder, soybean cake meal and / or rapeseed oil meal and calcium-magnesium phosphate powder are mixed according to proportion and aerobically fermented for the second time; (4) air-drying and packaging. The production method adopts the quail feces and the distiller's grain fermented with the microbial agent made from the nitrogen-fixing bacteria, the phosphate-solubilizing bacteria and the potassium-solubilizing bacteria according to proportion as main materials, the composition of the materials is simple but has an excellent fertility-increasing effect, and the production process is easy to operate, and is suitable for mass production.

The invention provides sugarcane compound microbial fertilizer which comprises the following compositions by weight percent: 7-9 wt% of active functional bacteria, 1-3 wt% of a soil improvement agent, 40-50 wt% of organic fertilizer, 40-50 wt% of inorganic compound fertilizer, wherein the total percent of all the compositions is 100%. The invention further discloses a preparation method for the sugarcane compound microbial fertilizer. According to the invention, the micro-ecological environment of rhizosphere soil of plants can be activated through the mutual effect of bacteria for nitrogen fixation, phosphorus solubilization and potassium solubilization such as nitrogen fixation helicobacter, bacillus megaterium, and bacillus mucilaginosus and the 'E-2001' soil improvement agent; nitrogen fixation can be realized, and nutrient elements such as potassium, phosphorus, and magnesium which are difficult to dissolve can be converted into soluble nutrients, so that available nutrient content in soil is increased, chemical fertilizer consumption is reduced, and the utilization rate of the fertilizer is improved by 32%; the crop growth and development are facilitated, the stress resistance is enhanced, the sugarcane yield is increased by 25%, and the sugar degree is increased by 1-2 degrees.

The invention belongs to the technical field of fertilizer, and more specifically relates to a tobacco special-purpose charcoal-based compound fertilizer, and a preparation method and an application method thereof. The tobacco special-purpose charcoal-based compound fertilizer comprises, by weight, tobacco straw, waste tobacco, pig manure, earthworm manure, vegetable waste, domestic garbage, nitrogen fertilizer, phosphate fertilizer, potassium fertilizer, trace element liquid fertilizer, a compound microbial agent, and an adhesive, and is prepared through a plurality of technologies. The tobacco special-purpose charcoal-based compound fertilizer is high in granulation rate, is capable of obviously improving fertilizer utilization rate, and is capable of improving soil acidifying and hardening after being applied to tobacco field, and increasing soil available nutrient content; the quality of the harvested tobacco leaves is improved obviously, the proportion of middle and upper-grade tobacco leaves is increased, the yield per mu and the output value per mu are obviously increased; and the tobacco special-purpose charcoal-based compound fertilizer is taken as a base fertilizer, onlyone time of application is capable of satisfying all the requirements of tobacco on nutrients in the tobacco growth period, reducing the using amount and the application frequency of traditional fertilizers; using is convenient; and labor is saved.

The invention discloses a magnetic controlled-release fertilizer capable of improving soil water release and fertilizer maintenance capacity, and a preparation method thereof. The magnetic controlled-release fertilizer is prepared from following raw materials, by weight, 80 to 90 parts of weathered coal, 13 to 16 parts of magnesium sulfate, 20 to 22 parts of potassium chloride, 16 to 19 parts of tricalcium phosphate, 85 to 95 parts of fly ash, 230 to 250 parts of rape seed cake, 90 to 100 parts of rice chaff ash, 70 to 90 parts of iron pyrite ash, 36 to 38 parts of cassava starch, 5 to 8 parts of calcium acetate, 8 to 12 parts of a composite biological bacteria preparation, and an appropriate amount of water. According to the preparation method, raw materials, such as weathered coal and rice chaff ash, with excellent adsorbability are mixed with calcined ash with magnetization modification effect, adding of the magnetic controlled-release fertilizer into soil is capable of improving polymerization effect aggregate micelle in soil, realizing agglomeration of small particles in soil, obtaining relatively large microaggregates, reducing soil specific surface area, adhesion stress, and expansibility obviously, reducing soil volume weight, increasing soil interstices and water release and fertilizer maintenance capacity, and providing crop growth with beneficial environment.

The invention provides a remediation method of alkaline soil, and relates to the technical field of soil improvement. The method comprises the steps of (1), soil preparation; (2), soil loosening agentapplication; (3), soil improving fertilizer application. According to the method, the alkaline soil is restored through the steps of soil preparation, soil loosening agent application, soil improvement fertilizer application and the like to reduce soil alkalinity, improve soil characteristics, loosen soil, increase soil fertility to gradually improve soil alkalinization, soil sterilization and fertilizer addition are conducted while the soil alkalinity is reduced, and the method is a remediation method which has the effects of alkaline soil conditioning agent and value improving and synergism.

The invention discloses a coated controlled-release preparation for relieving soybean saline-alkali stress and a preparation method and application thereof. The preparation method of the coated controlled-release preparation comprises the following steps: preparing an organic fertilizer and a soil conditioner as nuclear materials; continuously adding a bonding agent; mixing and granulating; drying; wrapping with a controlled-release coating material. The prepared coated controlled-release preparation for relieving soybean saline-alkali stress is applied to saline and alkaline land for planting soybean, so that the utilization rates of the organic fertilizer and the soil conditioner can be increased, the surface oil layer of the saline and alkaline land keeps low salinity and high nutrition, stable growth of the soybean is promoted, the soybean yield is increased remarkably, an optimized management mode of sustainable utilization of saline-alkali soil resources is realized, a basis is laid for the management of saline and alkaline farmland, and peasant income is increased.

The invention provides a method for improving urban green land soil with wood vinegar fertilizer. The method comprises the following steps of: 1, selecting an urban green land to be improved, and detecting the physical and chemical properties of the soil; 2, preparing the wood vinegar fertilizer; 3, applying the wood vinegar fertilizer to the urban green land soil to improve the soil. According to the method, the wood vinegar fertilizer is applied to the urban green land soil to improve the physical and chemical properties of the soil. With the adoption of the method, the EC value, pH value, and soil bulk density of the soil can be reduced; the content of organic substances in the soil, the content of available nutrient, the number of microorganism and the total porosity can be increased; the method is beneficial for the growth of landscape plant in the green land as well as the achievement of landscape effect of the green land, and has high practical and economic value.

The invention belongs to the technical field of agricultural planting and specifically relates to a pepper cultivation method capable of reducing soil-borne diseases. The pepper cultivation method comprises the following steps: (1) reconstructing a soil plough layer; (2) applying organic materials; (3) irrigating water and carrying out film mulching treatment; (4) carrying out land preparation andapplying base fertilizer; (5) carrying out field planting; (6) applying additional fertilizer. According to the pepper cultivation method involved in the invention, soil of a pepper planting land issubjected to plough layer reconstruction, and a lot of organic materials with the carbon / nitrogen ratio of (30 to 35) to 1 are applied; 5 d and 10 d after water irrigation and film mulching are carried out, water is irrigated at the periphery of a thin film respectively, so that a gap between the edge of the periphery of the thin film and the soil is sealed by water; the fertilizer is scientifically applied in a pepper cultivation process, and a plurality of types of potassium fertilizer are matched to apply, so that the incidence rate of four soil-borne diseases of peppers can be remarkably reduced, wherein the incidence rate of pepper bacterial wilt is averagely reduced by 46.07 percent, the incidence rate of pepper phytophthora blight is averagely reduced by 26.20 percent, the incidencerate of pepper root rot is averagely reduced by 32.45 percent and pepper root-knot nematode does not occur.

The invention discloses a tobacco cultivation and fertilization method realizing tobacco field improvement and tobacco leaf quality improvement. The tobacco cultivation and fertilization method solvesthe technical problem that the tobacco field soil has a poor physical structure and nutrient imbalance. The method comprises: selecting uniform field pieces with medium soil fertility and flat terrain, preparing soil in the middle and last ten-day of April before the transplanting of the tobacco seedlings, mechanically leveling the tobacco field, carrying out row replacement on biochar, organic bacterial fertilizer and special fertilizer for tobacco, ridging the field through a double ditching method, wherein in ditching, fertilizer is applied to a position under the tobacco ridge, transplanting tobacco seedlings in the last ten-day of April to the first ten-day of May, applying enough water, covering the field with a mulching film, removing the mulching film when the tobacco grows to a rosette stage, carrying out ridging on the tobacco ridge, topdressing tobacco-specific compound fertilizer through a nesting fertilization method, carrying out field management measures and local cultivation technical regulation processes and harvesting mature tobacco leaves according to local regulations. Through reasonable combination of biochar and organic bacterial fertilizer, the soil nutrientbalance and biological properties are improved and the agronomic traits, yield, quality and economic traits of the tobacco are improved.

The invention discloses a soil improvement method under a crop rotation system of wheat-corn in a tide soil region of North China. The method aims at solving the technical problems of shallow soil tillage layer and low soil water and fertilizer conservation capacity. The method comprises the following steps: in a wheat planting season, corn stalks of the last season are crushed and the whole amount of straws is returned to the field combined with soil rotating tillage. The depth of the rotating tillage is controlled to 15-18 centimeters, and basal fertilizer especially for the wheat is appliedwhile the wheat is sowed. Urea is applied to wheat during green-back period, and watering is carried out in time after the application. In a corn planting season, the wheat stalks of the last seasonare crushed and returned to the field in full amount in combination with the deep loosening of soil spacing. The distances between deep loosening ditches are determined according to the distances between the sowing rows of the corn. Fertilizer especially for the corn is applied while the corn is sowed. The corn is sowed between two adjacent deep lessening ditches or tillage-free areas in the ditches. The method can improve the structure of soil arable layers, promote the expansion of the arable layers, improve the production performance of the soil, ensure the uniform distribution of nutrientsbetween arable layers, promote the growth of crops, and improve the unit yield.

The invention relates to the technical field of soil improvement, in particular to a method for improving the soil property of a tobacco field. The method comprises steps as follows: (1) reconstruction of a soil plough layer of the tobacco field; (2) application of an organic material; (3) irrigation treatment; (4) application of base fertilizer; (5) application of additional fertilizer. With a reconstruction technology of the soil plough layer, 0-20 cm soil is interchanged with 20-40 cm soil in the tobacco field, then, a large quantity of organic materials are applied, water is irrigated, pyrroloquinoline quinone is applied in a matched manner, inorganic fertilizer, particularly, multiple different potash fertilizer is combined for application, accordingly, the content of organic matter in soil can be increased, the soil structural property can be improved, the bulk weight of the soil can be reduced, the soil porosity can be improved, and the soil acidity can be reduced. The dosage ofinorganic fertilizer in a conventional cultivation method can be reduced, the available nutrient, particularly, the content of available potassium, of the soil in the tobacco field is increased, thephysicochemical properties of the soil are improved, and the microbial activity of the soil is improved.

The invention discloses a soil heavy metal pollution conditioner and a preparation method thereof. The soil heavy metal pollution conditioner is prepared from a component A mineral including yellow phosphorus slag, peat moss soil, titanium gypsum and the like, a component B mixture including dry distillers' grains, animal waste, crop straw, bagasse, bran, mushroom culture medium materials and thelike, and a C component active fermenting material including yogurt, distillers' grains and the like. According to the conditioner, mainly industrial and agricultural by-products are adopted, the conditioner is prepared through a simple fermentation process, heavy metals in soil can be effectively fixed, the content of organic matter and nutrient elements in the soil can be increased, the conditioner contains a large number of microorganisms, and the organic matter in the soil can be decomposed into ingredients easier for plants to absorb. The conditioner is low in raw material cost, the riskof secondary pollution is avoided, the passivation rate of the heavy metals is high, the fertility of the soil can be improved, and and the comprehensive effect of soil conditioning is good.

The invention relates to the field of soil improvement, and in particular relates to a composite modifier for gleyed soil. The modifier comprises the following components in parts by weight: 5-10 parts of quicklime, 20-30 parts of fly ash, 50-60 parts of fermented and decomposed cow dung, and 10-15 parts of fermented and decomposed rapeseed cakes. The invention further provides an application method of the composite modifier in improvement of the gleyed soil. The composite improver disclosed by the invention is applied to a gleyed rice field, the physical and chemical properties of the soil are improved, the soil porosity is increased; the soil permeability is improved, the soil volume weight is reduced, the structure of the soil agglomeration body is improved, the soil acidification degree is reduced, the soil redox potential is increased, the total amount of the soil reducing substances is reduced, the soil toxicity is reduced; the quick-acting nutrient content of the soil is increased, the yield of the rice is promoted by more than 10%, and the improved effect is very remarkable.

The invention discloses a rejuvenation method of a declining tea garden. The rejuvenation method comprises the following steps of deeply loosening and modifying soil, preparing an organic carbon nutritional layer, modifying the soil by microorganisms, promoting rooting, applying active plant fertilizer, and trimming tea trees. The rejuvenation method is characterized in that rejuvenation pits aredug around the root of the tea tree, the mixed composted farm manure and organic carbon nutritional soil are backfilled into the rejuvenation pits to form the organic carbon nutritional layer, and themicroorganisms are added into the organic carbon nutritional layer to decompose and produce a large amount of secondary nutritional substances, so as to improve the soil environment; rooting promoting bacteria are added to the root of the tea tree to stimulate the growth and development of the root of the tea tree, the prepared active plant fertilizer contains nutrients for supplementing the major, medium and trace nutritional elements required by the normal growth and development of the plant, the proportional ratio of the nutrients is reasonable, and the environment of the declining soil ofthe tea garden is improved; in match with the proper trimming of the tea tree, restored vitality of the declining tea tree is promoted, and the service life of the tea tree is prolonged.

The invention provides an ecological cultivation method of bananas and sugarcanes for overcoming soil continuous cropping obstacles. Sugarcanes are successively planted in a banana field which has planted with bananas for more than three years and shows the continuous cropping obstacles, the ecological cultivation measures such as covering banana fields with sugarcane leaves and returning residual bodies of banana and sugarcane stems to the fields for utilization are combined, and thereby the micro-ecological environment of the soil is effectively adjusted, enrichment of beneficial microorganisms is facilitated, the available nutrient content of the soil is increased, the soil-bore diseases such as banana wilt and the like can be effectively controlled, the physicochemical property of the soil can be improved, and the quality and yield of the bananas and the sugarcanes are improved. Experimental results show that after crop rotation of the bananas and the sugarcanes, the banana yield reaches 3050kg / mu and the sugarcane reaches 7776.7kg / mu and are respectively 32.82% and 12.47% higher than the yields of the fields which are not subjected to crop rotation, the yield is high and stable, and the continuous cropping obstacles can be effectively overcome.

The invention discloses a magnetization slow-release fertilizer capable of improving soil structure and a preparation method thereof. The magnetization slow-release fertilizer capable of improving the soil structure is made from raw materials with parts by weight: sugar beet pulps 240-270, copper sulfate powder 9-11, ammonium chloride 14-16, sawdust 80-100, fish meal 40-60, sodium selenite 8-10, fly ash 95-105, pyrite ash 60-70, cassava starch 26-30, calcium acetate 4-6, composite bacterial strains 13-18 and moderate water. The novel magnetization slow-release fertilizer capable of improving the soil structure respectively magnetizes solid of fertilizer granular and magnetizes liquid of an enveloped liquid, can improve crop yield and fertilizer utilization rate in same fertilizer input by mixing magnetic carriers, nitrogen, phosphorus, potassium and microelement and the like according to a proportion, improves soil nutrient condition and quality of agricultural products, and has important significance for improving farmer income and promoting agricultural development.

The invention discloses a magnetization slow-release fertilizer capable of improving soil microbial ecology and a preparation method thereof. The magnetization slow-release fertilizer capable of improving the soil microbial ecology is made from raw materials with parts by weight: egg shells 50-70, fulvic acid potassium 26-29, ammonium bicarbonate 23-26, furfural residues 260-270, grass carbon 190-210, sodium hydrogen sulfite 8-14, fly ash 100-110, pyrite ash 80-90, cassava starch 26-30, calcium acetate 4-8, composite bacterial strains 13-17 and moderate water. The magnetization slow-release fertilizer capable of improving the soil microbial ecology adds various magnetotactic microorganisms, various different kinds of beneficial magnetotactic microorganisms also exist in soils simultaneously, the magnetization slow-release fertilizer capable of improving the soil microbial ecology can affect activity of the beneficial magnetotactic microorganisms through magnetization of fertilizers by adopting organic humus in the fertilizers as a nutrient source, improves activity of proteins and enzymes, and enhances activity of microorganisms, thereby promoting organic matters in the soils to resolve, and improving the content of absorbable nutrients of crops.

The invention discloses a high-utilization-rate magnetized sustained-release fertilizer and a preparation method thereof. The fertilizer is prepared from the raw materials, by weight: 60-70 parts of broadleaved wood chip, 9-10 parts of magnesium humate, 300-320 parts of dry cow dung, 130-160 parts of cottonseed hull, 20-24 parts of ammonium nitrate, 6-7 parts of cobalt chloride, 55-65 parts of fly ash, 90-110 parts of pyrite ash, 30-32 parts of tapioca starch, 3-6 parts of calcium acetate, 17-19 parts of a composite biological agent, and proper amount of water. According to the invention, organics and inorganic raw materials are blended, such that fertilizer nutrient composition is enriched, and instant and delayed nutrient contents in soil are increased. The fertilizer is applied in soil after magnetization, such that soil magnetism can be increased with residual magnetism in the fertilizer. Soil magnetism and biological magnetism effects are improved, soil and crop microcirculation is improved, fertilizer effect is more fully performed, and fertilizer utilization rate is improved.

The invention discloses a dampproof easily-absorbed magnetized slow-release fertilizer and a preparation method thereof. The dampproof easily-absorbed magnetized slow-release fertilizer is prepared from, by weight, 45-65 parts of soybean oil sediments, 35-40 parts of peat soil, 160-190 parts of sesame meal, 10-12 parts of magnesium nitrate, 26-28 parts of potassium hydrogen phosphate, 250-280 parts of Chinese medicine residues, 23-25 parts of EDTA chelate boron, 80-100 parts of flyash, 55-60 parts of iron pyrite ash, 30-35 parts of cassava starch, 5-8 parts of lime acetate, 20-24 parts of a composite bacterial strain and a proper amount of water. According to the fertilizer, raw materials contain sufficient nitrogen, phosphorus and potassium which are greatly needed by plants, meanwhile the EDTA chelate boron and chelating liquid of a coated layer are utilized, it is beneficial for the plants to absorb various microelements, fermented granulation of the soybean oil sediments, the peat soil and the like serve as organic matter and an anti-blushing agent, dryness and stabilization of fertilizer particles can be guaranteed to the maximum degree, the service life of the fertilizer is prolonged, and effectiveness of fertilizer nutrients is maintained.

The present invention discloses a heavy metal harm reducing magnetization slow-release fertilizer and a preparation method thereof, the magnetization slow-release fertilizer comprises the following parts by weight of raw materials: 200-240 parts of rapeseed cake powder, 24-26 parts of calcium ammonium nitrate, 30-35 parts of potassium dihydrogen phosphate, 160-180 parts of bagasse, 15-20 parts of actinolite powder, 7-9 parts of zinc sulfate powder, 70-80 parts of fly ash, 45-55 parts of pyrite ash, 20-24 parts of tapioca starch, 4-6 parts of calcium acetate, 10-12 parts of a complex biological agent and proper amount of water; the magnetization slow-release fertilizer is prepared in inorganic and organic mixing manner, can effectively improve the nutrient content of the fertilizer, through double magnetization of the fertilizer and activation of the actinolite powder and other raw materials, crop root superoxide dismutase and catalase activity can be significantly improved, oxidative stress caused by residual heavy metals in soil can be eliminated, the integrity of root cell membranes can be maintained, plant tolerance to heavy metals can be enhanced, plants can be prevented from harm and harm to plants can be reduced.

The invention discloses a method for producing an organic fertilizer from pig manure. The method comprises the following steps: (1) mixing; (2) primary fermentation; (3) secondary fermentation; (4) moisture adjustment; and (5) crushing and sieving. The pig manure undergoes dry-wet separation and microbial dynamic continuous high-temperature fermentation, microbes are used to quickly decompose andconvert substances which can be easily decomposed and easily generate odor in raw materials in the fermentation process, and a high temperature generated in the decomposition process can kill pathogens, eliminate the odor, reduce the water content, reduce the volume and the weight and increase the content of rapidly available nutrients.

The invention relates to the field of microorganisms, in particular to stenotrophomonas FT2 and application of fertilizer and fungicide in broad-spectrum biocontrol and growth promotion. The invention provides a strain of stenotrophomonas sp. FT2 with broad-spectrum biocontrol and growth promoting effects, wherein the preservation number of the stenotrophomonas FT2 is CGMCC No.21379. The strain has an inhibition effect on a plurality of fungal diseases, has the advantages of no toxicity, harmlessness and no pollution, can promote the germination of plant seeds and the growth of plants, improves the enzymatic activity of plant rhizosphere soil and the content of available nutrients, and increases the number of soil bacteria.

The invention discloses microbial immobilized organic fertilizer and a preparation method thereof. The fertilizer is prepared from raw materials including silkworm shit, algae, coconut shells, medical stone powder, ferric chloride, an EM fungicide and the like. Degradation of organic matter in soil can be accelerated, the content of available nutrients in plants is increased, and the fertilizer has the characteristics of organic fertilizers as well as advantages of microorganisms, can be applied to various kinds of crops and soil, cannot damage the soil structure or contaminate soil, is harmless to people and livestock, improves the soil fertility, can prevent soil-borne diseases, promote growth of the crops, increase the yield and improve the quality of agricultural products and has relatively high social benefits and economic value.

The invention discloses magnetized controlled release fertilizer capable of resisting a saline and alkaline land and a preparation method of the magnetized controlled release fertilizer. The magnetized controlled release fertilizer is prepared from the following raw materials in parts by weight: 270 to 300 parts of soybean meal, 8 to 10 parts of rare earth, 50 to 70 parts of wheat gluten powder, 22 to 26 parts of copper humate, 140 to 160 parts of straw ash, 15 to 18 parts of potassium sulfate, 80 to 100 parts of fly ash, 60 to 70 parts of iron pyrite ash, 33 to 37 parts of cassava starch, 6 to 9 parts of calcium acetate, 12 to 16 parts of compound biological microbial inoculant and a proper amount of water. The fertilizer is magnetized and modified and organic materials including the straw ash, the wheat gluten powder and the like which have a relatively strong base ion adsorption capability are also added, so that mineral sediment in soil can be dissolved and is converted into effective nutrients to be absorbed by crops; meanwhile, the total salt content, total alkalinity, exchangeable sodium and pH value of a soil plough layer can be reduced, so that the solubility of soluble salt in the soil is reduced, the salt inhibition effect is realized and damage to the crops by soil salinity are alleviated.

The invention relates to an oxygenating cultivation method for irrigating rice irrigation with micro-nano bubble water, belonging to a rice cultivation method. The method comprises the following steps: 1) conditioning a rice seedling bed, thinly sowing seeds, and cultivating strong seedlings tillering; 2) carrying out soil preparation process and deeply applying basal fertilizers before transplanting, and then transplanting young seedlings; 3) using micro-nano bubble oxygenated water to irrigate rice after transplanting, wherein the rice should not be irritated with the water again until the water is naturally consumed to enable transform the field surface to a wetting state, so that repeated alternation between shallow water and wetting can be formed; applying tillering fertilizers within 7-10 days after transplanting the young seedlings; and drying the field in time after the seedlings grow to enough height; and 4) preventing pests and plant diseases in due time, and harvesting the rice when 95% of grains in the entire field are in the yellow ripe state. By using the invention, the root zone oxygen environment of rice is improved, the root system growth development and the function establishment of rice are promoted, raises the absorption efficiency and utilization efficiency of nitrogenous fertilizer for rice are raised, the contents of available nutrients in soil are increased, obviously the low-position tiller proportion of rice at tillering stage is increased so as to improve percentage of earbearing tiller, and can postpone the leaf senescence can be postponed in grain filling stage, thereby obviously raising setting percentage and improving the rice yield.

The invention discloses a fertilizer for improving alkaline soil, and a preparation method thereof, and relates to the technical field of soil improvement, wherein the fertilizer comprises the following raw materials by weight: 30-60 parts of calcium phosphate, 10-20 parts of ammonia water, 30-55 parts of humic acid, 15-40 parts of polyacrylate, 20-35 parts of sepiolite powder, 20-30 parts of sesbania, 15-20 parts of sweet clover, 25-35 parts of dry excrement, 35-50 parts of crop straw, 7-10 parts of a microbial bacterial liquid and 10-80 parts of distilled water. According to the invention, the fertilizer for improving alkaline soil is prepared by mixing the natural organic matters and the acidic inorganic fertilizer, so that the content of the available nutrients in soil is remarkably increased, the soil is improved, the ecological improvement is conducted on alkaline soil, the organic matters of soil can be increased, the soil texture structure and the physicochemical properties ofsoil are improved, and the fertilizer has advantages of ecological environmental protection, low cost, convenience and high efficiency; and a large amount of easily degradable components are used, sothat the degradation rate of the fertilizer in soil is increased, the soil micro-ecological environment is improved, and the soil fertility is maintained.

The invention discloses a magnetized slow release fertilizer for improving crop absorption capacity and a preparation method thereof. The magnetized slow release fertilizer is prepared from the following raw materials by weight: 250-280 parts of peanut meal, 8-10 parts of zinc chloride, 14-18 parts of potassium feldspar powder, 20-24 parts of calcium superphosphate, 170-190 parts of sawdust, 40-60 parts of pomegranate peel powder, 100-120 parts of fly ash, 75-85 parts of pyrite ash, 25-27 parts of cassava starch, 6-8 parts of calcium acetate, 14-17 parts of a composite biological agent, and a proper amount of water. After use, the fertilizer provided by the invention can magnetize the shallow soil layer soil, strengthen crop physiologic potential and cell magnetic potential, and adjust the in vivo enzyme activity of crops, thereby causing magnetochemical reaction and magnetobiological effect around soil and crop roots, promoting the nutrient absorption of crops, and improving organic matter synthesis and transformation and other metabolic activities in crops. All the effects are finally reflected in promotion of crop growth and development, yield increase and quality improvement.

The invention relates to the technical field of crop cultivation, in particular to a method for cultivating dry-land cabbage type spring rapes through mechanized plastic mulching and hole sowing. Themethod sequentially comprises the following steps of land selection and preparation, base fertilizer application, seed dressing, plastic mulching and hole sowing machine selection, mechanical plasticmulching and hole sowing and field management. The mechanized plastic mulching and hole sowing technology is convenient and simple, the fertilizer application, field arrangement, pollution-free insectprevention and other technologies are reasonable, the yield and economic traits of the spring rapes can be improved better, the labor cost is reduced, and the possibility of whole mechanization and fertilizer and pesticide reduction during the dry-land cabbage type spring rape cultivation is achieved; compared with the prior art, the method for cultivating the dry-land cabbage type spring rapes through mechanized plastic mulching and hole sowing specifically has the advantages that (1), the completely-efficient and quickly-efficient nutrient content and organic matter content of soil are increased, and the pH value of the soil is effectively reduced; (2) the plant height, branch number, silique number, thousand seed weight and other economic traits of the spring rapes are obviously increased; (3) the average yield of a demonstration area is 4863.9kg per hectare and is 2.57-28.68% higher than that of open-field culture in the demonstration area.