477results about How to "Reduce the frequency of fertilization" patented technology

The invention discloses a slow release fertilizer having a soil remediation function. The slow release fertilizer is prepared by mixing fully-biodegradable polyhydroxyalkanoates and organic and inorganic nutrient substances. The fully-biodegradable polyhydroxyalkanoates is slowly degraded under the actions of soil microorganisms to provide nutrient substances needed by the growth of the soil microorganisms so as to promote the ionization effects of the soil microorganisms on heavy metals and release the organic and inorganic nutrient substances by slow degradation so as to promote durable and rapid growth of plants and improve soil remediation efficiency. The invention also discloses a soil contamination remediation method for using the slow release fertilizer. High-efficiency, environmentally-friendly and durable remediation of heavy metal-contaminated soil is realized by planting plants having hyper-accumulation capability to absorb and extract the heavy metals in the soil to which the slow release fertilizer is applied.

The invention relates to a water-holding and cultivating functional compound fertilizer, comprising a nitrogen fertilizer, a phosphate fertilizer a potash fertilizer, a trace element fertilizer, a compound amino acid, a soil conditioner, an organic matter and the like. In addition, the invention relates to a preparation method of the water-holding and cultivating functional compound fertilizer. The invention also relates to use of the water-holding and cultivating functional compound fertilizer for improvement of the growth characters and / or yield of crops.

The invention provides a method for preparing a special compound biological medicine fertilizer for apple trees, which comprises the following raw materials in parts by weight: 30-40 parts of kitchen wastes, 20-30 parts of tobacco straws, 10-15 parts of plant ash, 10-15 parts of distillers' grains, 16-18 parts of potassium humate, 10-12 parts of bird feathers, 18-22 parts of modified fly ash, 12-14 parts of urea, 11-13 parts of ammonia water, 14-16 parts of diammonium phosphate, 13-15 parts of potassium sulfate, 11-13 parts of calcium superphosphate, 2-4 parts of cnidium fruit, 2-4 parts of aloe, 3-5 parts of eucalyptus leaves, 2-4 parts of pharbitis seed, 3-5 parts of cyrtomium rhizome, 0.5-0.8 part of zinc sulfate, 0.8-1.0 part of magnesium sulfate, 0.7-0.9 part of boric acid, 0.4-0.6 part of fermentation preparation and a proper amount of citronella oil. After various organic wastes are mixed and fermented to produce green organic fertilizers, the environmental pollution is reduced, the fermented organic matter is mixed with the inorganic fertilizer, the Chinese herbal medicine juice (citronella oil) with insecticide properties is added, the nutrition is more comprehensive, and the bactericidal effect is increased; the fertilizer has the advantages of obviously improved fertilizer utilization ratio, single time of application, effective slow release, reduced fertilization frequency, reduced fertilizer cost and improved economic benefit; and after the application of the fertilizer, the quality of the apple trees can be effectively improved, and the yield can be improved.

The invention relates to a special organic and inorganic compound fertilizer for a lawn and a preparation method thereof. The preparation method comprises the following steps of: fermenting and decomposing sludge, edible fungus residues and a microbial fermentation fungal agent and then adding an inorganic fertilizer to produce the special organic and inorganic compound fertilizer, the nutrient content of which meets the nutrient requirement of the lawn. The special organic and inorganic compound fertilizer has long fertilizer efficiency, uniform nutrient supply and organic and inorganic combination, ensures the lawn quality and improves the soil fertility.

The invention discloses a synchronous ditching ridging fertilizing seeder for paddy field, comprising a power machine, a fertilizing power driving system installed on the power machine, a fertilizer ejecting system, a hanging device, a sowing system, a sowing power driving system and a ditching device. The hanging device is installed at the back part of the power machine and is connected with the sowing system to control the sowing system and the ditching device installed below a sliding plate in the sowing device to be lifted up or to be lifted down; the power machine is respectively drives the sowing system and the fertilizer ejecting system by the sowing power driving system and the fertilizing power driving system. The ditching device is synchronously ditched with water storing ditches, sowing ditches and fertilizing ditches, wherein ridges are formed between each two water storing ditches, and the sowing ditches and the fertilizing ditches are positioned on the ridges. The invention can realize synchronous ditching, synchronous ridging, synchronous fertilizing and paddy production with water saving and fertilizer saving, can increase the yield of the paddy to be more than 10%, save the fertilizer to be more than 20%, and has obvious ecological benefit and economic benefit.

The invention discloses synchronous nutrition fertilizers, preparation methods thereof and applications thereof. The synchronous nutrition fertilizers comprise four formulas consisting of a high nitrogen formula, a high nitrogen potassium formula, a high potassium formula and an equalization formula, and the synchronous nutrition fertilizers of the four formulas respectively comprise a base fertilizer and a resin coating controlled release component adapted to the base fertilizer. The synchronous nutrition fertilizers of the invention can be applied to the one-time fertilizing of short-growth period field crops or the less-time afterfertilizing of long-growth period or perennial economic crops. The preparation methods of the invention not only allow the nutrient proportion of the fertilizers to satisfy demands of crops, but also allow the speed, the quantity, the proportion of nutrition elements of nutrients in the fertilizers to be controlled to basically fit the demands of nitrogen, phosphor and potassium of the crops with various growth periods. An organic cooperation of the fertilizers of the four base formulas of high nitrogen, high nitrogen potassium, high potassium, and equalization with the resin coating controlled release component is provided in the invention to solve a present limitation that one formula fertilizer only corresponds with the nutrition demands of one or one type crop.

The invention discloses special slow release fertilizer for grapes. The fertilizer is prepared from, by weight, 100-120 parts of brewery wastewater, 50-80 parts of sugar refinery wastewater, 20-30 parts of vinasse, 80-90 parts of corncob powder, 50-60 parts of peanut hull powder, 30-40 parts of wheat bran, 60-90 parts of residues of oil manufacture, 50-60 parts of smooth vetches, 70-80 parts of sweet clovers, 60-80 parts of azoila imbricata, 5-8 parts of zeolite powder, 10-12 parts of activated carbon, 30-50 parts of horse manure, 20-40 parts of goat manure, 35-45 parts of chicken manure, 20-30 parts of silkworm excrement, 1.2-2 parts of superphosphate, 0.08-0.1 part of borax, 3-5 parts of complex enzyme preparations, 8-12 parts of complex fermentation microbial agent, 5-10 parts of nanocarbon, 30-40 parts of residues from a biogas digester, 20-30 parts of humate, 15-35 parts of roots of soybeans, 20-25 parts of dregs of a decoction, 16-25 parts of straw powder and the like. The invention further discloses a preparation method of the special slow release fertilizer for grapes.

An organic-inorganic microbiological water-soluble fertilizer specially used for grape is prepared from following raw materials: potassium fulvate, potassium nitrate, urea, monoammonium phosphate, polyaspartic acid, potassium sulfate, zinc sulfate, ferrous sulfate, borax, a microbiological preparation, copper sulfate, manganese sulfate and EDTA. A preparation method of the fertilizer includes following steps: mixing powdery potassium fulvate, the powdery microbiological preparation and powdery polyaspartic acid uniformly to obtain a mixed material; processing the mixed material at constant temperature to obtain a material A; respectively crushing the urea, the potassium nitrate, the potassium sulfate and the monoammonium phosphate with mixing uniformly to obtain a material B; crushing the zinc sulfate, the manganese sulfate, the ferrous sulfate, the borax, the copper sulfate and the EDTA with mixing uniformly to obtain a material C; mixing uniformly the material A, the material B and the material C to obtain a product. The fertilizer is complete in nutrition, is reasonable in formula, allows crops to absorb easily, has a significant yield-increasing effect, contains organic substances, inorganic substances, bacteria and medium-and-trace elements, is environmental-protective and is free of pollution, and can protect ecological environment and improve farmland soil.

The invention belongs to a sowing method of crops, in particular to a synchronously ditching, ridging, fertilizing and sowing method for precise direct hole-sowing of rice, which comprises the following steps: a. simultaneously arranging a plurality of parallel water storage ditches on a wet mud surface that is leveled; b. forming a ridge with a certain height between every two water storage ditches; c. arranging a sowing ditch and a fertilizing ditch on each ridge; d. adopting a hole-sowing mode to sow rice sprouts into the sowing ditches; and e. applying fertilizers into the bottom of the fertilizing ditches, adjusting the fertilizing amount according to agronomic requirements, earthing and flatly covering after fertilizing. The invention can realize that slow release fertilizers, controlled release fertilizers or other fertilizers can be quantitatively applied near root systems of rice in a targeted way, be convenient for the absorption of root systems and the growth of rice, decrease the using amount of fertilizers and further reduce the production cost of the rice and the pollution to the environment.

The invention discloses a planting method for obtaining good-quality and high-yield cortex moutan. The planting method for obtaining good-quality and high-yield cortex moutan comprises the steps of land selection, land preparation, seedling growing, timely transplanting, land management and the like. When base fertilizer is applied during land preparation, thoroughly decomposed farmyard manure and slow release nutrition particles are applied in a mixed mode, nutrition is comprehensive and balanced, the requirements for nutritional ingredients such as nitrogen, phosphorous, potassium, organic matter and microelements are met during seedling growing of moutan, the controlled release effect is good, the fertilizer efficiency is durable, the utilization rate is high, absorption is easy, the frequency of fertilizer application is reduced, and the emergence rate is increased; during sowing, seed dressing is conducted through modified plant ash, a good growing environment can be provided for growth of seeds, diseases and insect pests can be reduced, and the emergency rate can also be increased. By the adoption of the planting method, the quality of the cortex moutan can be improved, the yield of the cortex moutan can be increased, the cortex moutan can reach the high-quality level, the content of the effective constituent can be increased by over 10%, the yield is increased by over 35%, and the economic benefits of a moutan cortex farmer can be greatly increased; in addition, operation is simple, implementation is easy, cost is low, and the planting method is suitable for large-scale popularization.

The invention provides a special slow control / release fertilizer for an eggplant. The fertilizer is characterized by comprising, in terms of mass percent, 0.05% to 0.08% of n-butyl triamine thiophosphate, 0.05 to 0.08% of hydroquinone and 0.24 to 0.28% of dicyandiamide. According to the invention, the special slow control / release fertilizer is prepared by combining macro-element, medium-element and trace-element fertilizers like nitrogen, phosphorus, potassium, calcium, magnesium, molybdenum, boron, zinc and iron with organic fertilizers like high-quality decomposed rapeseed dregs, chicken manure and grass carbon, adding a urease inhibitor and a nitrification inhibitor and carrying out mixing; the special slow control / release fertilizer has a slow release effect in soil, is rich in a variety of nutrient elements needed in growth of the eggplant, can meet demands of the eggplant for nutrients in different growth and development phases for a long time and effectively improves output of the eggplant.

The invention discloses a special organic fertilizer for watermelons and a preparation method of the special organic fertilizer, and belongs to the technical field of fertilizers. The special organic fertilizer is prepared from the following raw materials in parts by weight: 30-40 parts of chicken manure, 20-35 parts of decomposed plant straw, 10-15 parts of wheat bran, 10-15 parts of peanut oil residue, 5-10 parts of oil sludge, 5-10 parts of humic acid, 2-5 parts of urea, 10-20 parts of trace elements, 5-10 parts of a complex microbial agent and 5-10 parts a functional microbial agent. The special organic fertilizer can provide abundant nutritive elements for the watermelons according to the growth characteristics of watermelons in various periods, and the special organic fertilizer can increase the yield, improve the quality and character and promote the good growth of watermelons. By using the special organic fertilizer, the use amount of unreasonable fertilizers can be reduced.

The invention relates to a special controlled release fertilizer for wheat and a preparation method thereof and belongs to the technical field of sustained release fertilizer and controlled release fertilizer. According to the rule of the fertilizer requirement of the wheat, the invention remixes 5 percent, 6 percent and 7 percent thermoplastic resin coated urea, sulfur coated urea, potassium chloride complex fertilizer, the potassium chloride, diammonium phosphate and zinc sulfate exactly to form the special controlled release fertilizer for wheat. The nutrient release rule of the controlled release fertilizer is in accordance with the nutrition absorption rule of the wheat, and the cost of the controlled release fertilizer is reduced; no more fertilization is required after one time of the fertilization of the controlled release fertilizer before the wheat is seeded, which reduces the labor intensity of the farmer and the labor cost.

The invention belongs to the field of crop fertilizers, and specifically relates to a special liquid medicine fertilizer for increasing production, killing pests and reducing residues of rice and a preparation method thereof. The medicine fertilizer comprises the following raw materials: microbial flora, humic acid, a nitrogenous fertilizer, a phosphatic fertilizer, a potash fertilizer, borax, an insecticide, a water soluble separant, a plant growth regulator, water and the like. The liquid medicine fertilizer directly sprayed to the leaf surfaces of cotton plants is uniform in distribution of nutrient substances, high in utilization ratio, easy to be absorbed by the leaf surfaces of the plants and simple and feasible to prepare and apply, and can further degrade pesticide residues and truly prevent and treat plant diseases and insect pests, thereby increasing the output of rice.

The invention provides a special slow / controlled release fertilizer for capsicum. The special slow / controlled release fertilizer for capsicum is characterized in that the special slow / controlled release fertilizer for capsicum comprises, by mass, 0.10-0.15% of N-(n-Butyl)thiophosphoric triamide or quinhydrone and 0.25-0.30% of dicyandiamide. A preparation method of the special slow / controlled release fertilizer for capsicum comprises the following steps: combining fertilizers of macro, medium and trace elements of N, P, K, Mg, B, Zn and the like with organic fertilizers comprising high-quality decomposed rapeseed meal, chicken manure and the like, adding a urease inhibitor and a nitration inhibitor, and mixing. The special slow / controlled release fertilizer for capsicum has a slow release effect in soil, is rich in all nutritional elements specially required by the growth of capsicum, can effectively satisfy the nutrient needs of the capsicum of different growth stages, and can effectively improve the capsicum output.

The invention discloses a double-layer microbial fertilizer and a preparation method thereof and belongs to the technical field of fertilizers. The fertilizer is composed of 40-50 parts of an inorganic compound fertilizer, 18-25 parts of an inner layer film coverage agent, 60-80 parts of an organic fertilizer, 3-5 parts of binder and 20-25 parts of an outer layer film coverage agent; the inorganic compound fertilizer serves as an inner layer fertilizer core and is wrapped by the inner layer film coverage agent, the organic compound fertilizer is bonded outside the inner layer film coverage agent, and finally the surface of the organic compound fertilizer is wrapped by the outer layer film coverage agent, so that a final product is obtained. The double-layer microbial fertilizer is rich in multiple types of nutrient elements, has a quite good controlled release effect and can maintain the stable and low release speed in the entire release process of nutrient, the release amount of different types of nutrient is matched with nutrient required by crops in the growing cycle, all nutritional constituents required by the crops in different growing periods can be provided, the yield-increasing effect is obvious, the attack rate of plant diseases and insect pests is low, the generation rate of malformed fruits is low, and extremely high application and popularization value is achieved.

The invention provides organic fertilizer special for rice and a preparing method thereof and belongs to the technical field of agricultural fertilizer. The fertilizer is prepared from 80-100 parts of fruit peel, 60-80 parts of edible fungus leftovers, 60-80 parts of animal dung, 20-30 parts of medical stone, 5-15 parts of radix semiaquilegiae extracts, 10-20 parts of prismatomeris tetrandra extracts, 3-5 parts of compound microorganism bacterium agent, 40-50 parts of humus, 5-15 parts of potassium chloride, 5-8 parts of ardealite and 2-3 parts of microelements. Through scientific compatibility, the fertilizer has various nutrient elements and highly accords with the nutrient absorption characteristics of rice in different growth periods, fertilizer efficiency is long, the yield of rice is increased, the traditional Chinese medicine ingredient extracts can effectively prevent diseases and pests, and safety performance is high. Furthermore, ardealite can be effectively utilized, the utilization rate of ardealite is increased, the soil environment can be effectively improved, the breathability, water retention capacity and fertilizer conservation capacity of soil are improved, and soil hardening is prevented.

The invention discloses a urea-ammonium mixed nitrogen fertilizer and a production method thereof, wherein the urea-ammonium mixed nitrogen fertilizer contains the raw material components by weight: 300-600 parts of urea ammonium nitrate solution, 180-400 parts of ammonium chloride, 20-250 parts of ammonium sulfate, 10-100 parts of ammonium bicarbonate, 20-100 parts of bentonite, 20-80 parts of potassium nitrohumate, 10-50 parts of boric acid, 0.2-0.7 parts of diethyl aminoethyl hexanoate, 1-6 parts of liquid anti-blocking agent, and 0.5-1 part of additive. The urea-ammonium mixed nitrogen fertilizer provided by the invention has advantages of high fertilizer utilization rate, high crop yield, soil improvement and fertility betterment, low cost, simple technology, safety application and high benefit.

The invention relates to a special controlled release fertilizer for orange and a preparation method thereof and belongs to the technical field of sustained release fertilizer and controlled release fertilizer. According to the rule of the fertilizer requirement of the orange, the invention remixes 6 percent, 7 percent and 8 percent thermoplastic resin coated urea, sulfur coated urea, potassium sulfate complex fertilizer, the potassium sulfate, diammonium phosphate, zinc sulfate and borax exactly to form the special controlled release fertilizer for orange. The nutrient release rule of the controlled release fertilizer is in accordance with the nutrition absorption rule of the orange, which improves the fertilizer absorption and utilization rate and reduces the cost of the controlled release fertilizer, and the effect of production increase is good.

The invention provides a biochar slow release base fertilizer special for wheat. The biochar slow release base fertilizer comprises a core layer and a coating layer coating the surface of the core layer. The core layer is made by mixing of the following raw materials by weight part: 30-40 of biochar, 10-15 of urea, 30-35 of potassium dihydrogen phosphate, 15-20 of potassium chloride, 30-40 of weathered coal, 0.2-0.6 of a botanical fungicide, 3-5 of abamectin dreg, 5-8 of vermiculite powder, and 0.2-0.5 of a fertilizer additive, and the weight of the core layer accounts for 50%-60% of the total weight of the slow release fertilizer. The coating layer is a mixture of biochar powder and a binder, and the weight of the coating layer accounts for 40%-50% of the total weight of the slow release fertilizer. The fertilizer provided by the invention has nutrients released slowly under control, one-time fertilization can meet the need of crops for fertilizer in the whole growth period, and the fertilizer dosage is reduced, thus effectively preventing pollution of the fertilizer to the environment. And the fertilizer provided by the invention can improve soil and increase wheat yield.

The invention belongs to the field of biological fertilizers, in particular to an organic compound fertilizer special for areca-nuts, which is prepared by the steps of uniformly mixing organic fertilizer with organic matter content of 30-38 percent, urea, calcium magnesium phosphate, potassium chloride, manganese sulfate, ferrous sulfate, copper sulfate, zinc sulfate, boric acid and ammonium molybdate, pelleting and drying until the content of water is less than 2 percent, wherein the content of organic matters is 9-12 percent, the content of N is 9-11 percent, the content of P is 2-4 percent, the content of K is 13-15 percent, the content of Ca is 7-9 percent, the content of Mg is 2-4 percent and the content of trace elements is 1.3-1.4 percent. The invention can provide full elements required by the growth of the areca-nuts by combining with the organic fertilizer and the chemical fertilizer scientifically, improves the effectiveness of the fertilizer, increases the yield of areca-nuts, can balance the soil acidity or alkalinity, enhance the soil organic content and full nutrient content, improve the physical properties of soil to ensure that the soil is loose without hardening, and the like.

The invention discloses a special organic and inorganic compound fertilizer for a loquat tree and a preparation method for the special organic and inorganic compound fertilizer. The special organic and inorganic compound fertilizer comprises chicken manure compost and inorganic chemical fertilizers. The chicken manure compost is prepared by using chicken manure, raw bone meal and biological fermentation microbial agent in a fermenting and decomposing way. The inorganic chemical fertilizers are added in the chicken manure compost. To calculate according to dry matter weight, the chicken manure compost accounts for 60-65 percent of total weight and the inorganic chemical fertilizers account for 35-40 percent of total weight. The improvement of loquat garden soil and the relief of soil hardening are facilitated; and the ecological treatment of poultry manure such as chicken manure is also facilitated, the resource utilization of the poultry manure is realized, the poultry manure is prevented from causing environmental pollution and the economic benefit and the ecological environmental benefit are good.

The invention discloses a high-concentration compound microbial fertilizer prepared by tower-type melt granulation and a preparation method thereof, belonging to the technical field of fertilizers. The fertilizer is composed of 300-500 parts of urea, 130-250 parts of monoammonium phosphate, 30-60 parts of humic acid, 200-300 parts of potassium sulfate, 1-10 parts of magnesium sulfate, 10-20 parts of compound microbial inoculant, 10-30 parts of polyaspartic acid, 30-50 parts of zinc sulfate, 20-30 parts of calcium superphosphate, 50-100 parts of oyster powder, 20-40 parts of silanization-modified zeolite, 3-5 parts of polyvinyl alcohol and 5-8 parts of urea formaldehyde. The fertilizer is reasonable in formula, can effectively improve the soil quality, implements balanced nutrient release, satisfies the demands of citruses for different nutrients in different growth periods, and can effectively prevent various physiological diseases from generation.

The invention relates to a special low-concentration slow release fertilizer for sugar cane. The nitrogen / phosphorus / potassium in the slow release fertilizer is 15:8:5. The invention can effectively the emergence rate, tillering rate and plant height of the sugar cane, and the test indicates that the emergence rate is enhanced by 0.9-1.7%, the tillering rate is enhanced by 2.3-4.2%, and the plant height is enhanced by 2.0-3.3cm; the slow release fertilizer can obviously enhance the agricultural yield of the sugar cane, and the test indicates that the unit yield of the sugar cane is enhanced by 0.8-1.5 t.hm<2>; the slow release fertilizer can obviously improve the quality of the sugar cane, and the test indicates that the field brix of the sugar cane is enhanced by 0.3-0.6% and the sucrose content is enhanced by 0.3-0.5%; and the invention reduces the number of times of fertilizer application, and lowers the labor cost. The special low-concentration slow release fertilizer for sugar cane is suitable to be applied to soil with medium sugar cane region fertilizers in tropical and subtropical zones in Southern China.

The invention discloses a fertilizer special for soybeans and a preparation method thereof. The method comprises the following steps: weighing, mixing and stirring citric acid, zinc sulphate powder, manganese sulphate powder, borax powder, ammonium molybdate powder and water at a reaction temperature of 80-90 DEG C for 40-60 minutes to prepare trace element chelate fertilizer liquid for spare; respectively weighing and stirring polyvinyl alcohol, cornstarch, dicyandiamide powder and water at a reaction temperature of 80-90 DEG C for 40-60 minutes to prepare bonding liquid for spare; uniformlymixing the trace element chelate fertilizer liquid and the bonding liquid according to a mass ratio of 1:4 for spare; respectively weighing, drying, crushing and screening pyrobituminous shale residue, calcium carbonate, magnesium sulphate, urea, diammonium phosphate and potassium sulphate by a screen of 100-120 meshes; uniformly mixing; adding the mixture to a pelletizer; and spraying the mixed liquid to granulate so as to obtain a the fertilizer special for soybeans. The invention has the advantages of comprehensive nutrients, good slow release, and the like, fully satisfies the growth needsof soybean and improves the yield and the quality of the soybean.

The invention belongs to the field of a crop fertilizer, and particularly relates to a special liquid fertilizer for increasing yield of strawberry, killing insects and degrading pesticide residues and a preparation method thereof. The fertilizer comprises microbial flora, a humic acid, a nitrogen fertilizer, a phosphatic fertilizer, a potash fertilizer, a boric acid, an insecticide, a water-soluble parting agent and the like. The fertilizer also can provide crop nutrients when killing diseases and pests, and is fast in foliar absorption by foliar absorption of the crop, and less in nutrient possibility, the photosynthesis of the crop also can be increased by the microbial flora, absorption and utilization of the nutrients are facilitated, the crop yield is improved, and the pesticide residues and the like are degraded.

The invention discloses a special fertilizer for eucalyptus and a preparation method of the special fertilizer. The fertilizer comprises the following components in part by weight: 65-85 parts of a large element basic fertilizer, 1-5 parts of medium and trace element fertilizers, 2-4 parts of humic acid, 0.1-0.5 part of microbial bacteria, 0.1-0.5 parts of a sustained release synergist, 1-4 partsof organic carbon and 10-20 parts of a filler. The special fertilizer for the eucalyptus, disclosed by the invention, has complete element compositions and can prevent an element deficiency symptom inthe growth process of the eucalyptus, thereby enhancing the resistance of the eucalyptus to an acuminate disease, reducing miscellaneous branches and enhancing the tree potential and the volume accumulation; in cooperation with the sustained release synergist, the fertilizer efficiency can be increased, and the times for applying the fertilizer by growers is reduced, so that the labor cost is reduced; finally, in match with more highly-active organic matters, carbon sources can be supplemented for the eucalyptus; while the eucalyptus photosynthesis is improved, and the volume accumulation isincreased, the carbon sources can also be taken as nutrient sources for microorganisms, so that the proliferation of the microorganisms is promoted, the soil environment is improved, and the disease and stress resistance of the eucalyptus is enhanced; and the effect on the cultivation of the eucalyptus is better.

The invention provides slow-release leaf surface selenium fertilizer and a preparation method thereof. The slow-release leaf surface selenium fertilizer comprises 1-2 parts of selenium fertilizer, 1-5 parts of microelements, 0.2-0.5 part of a growth adjusting agent, 1-5 parts of a surfactant, 50-60 parts of polyvinyl alcohol, 2-5 parts of Carbomer and 5-10 parts of sodium carboxymethylcellulose. The selenium fertilizer is matched with other fertilizer and a formula is reasonable, so that an adaptive range of the fertilizer is enlarged, the selenium fertilizer is easy to absorb, and the fertilizer effect is improved. With the adoption of the surfactant, a film agent is directly attached to a leaf surface, and thus the adhesive property of the slow-release leaf surface selenium fertilizer is improved; and furthermore, a slow-release film is prepared, so that nutritional components including the selenium fertilizer and the like can be slowly released and nutrition is easy to absorb.