313results about How to "Improve water use efficiency" patented technology

Construction for greening housetop comprises base layer, moisture retention device, and planting layer arranged on the base layer, wherein the moisture retention device is arranged between the base layer and planting layer and contacts with the planting layer partly. The base layer, moisture retention device and planting layer together create a circumstance for steady and long term plant growth like ground. The construction can guarantee normal growth of plants in natural condition especially in bad conditions, and can make full use of nuisanceless natural resources such as rainwater.

The invention discloses a color drought-resistance water-retention sustained-release compound fertilizer and a method for producing the same, wherein the method comprises the followings steps of: measuring, crushing and uniformly mixing fertilizer raw materials, granulating by adopting an ammonia-acid method rotary drum granulating process, performing one-stage drying, semi-cooling and screening of grains, and sending the mixture to a coating machine; adopting a continuous melting rotary drum film-coating method coating process to perform compressed air atomization and uniform coating of color coating oil sprayed by a special nozzle; and adding a water-retaining agent and an anti-adhesive agent by a screw conveyor, and performing full stirring, cooling and packaging to obtain the finishedproducts. The color drought-resistance water-retention sustained-release compound fertilizer has the effects of drought resistance, water retention, nutrient preservation, soil condition improvement and environmental protection, and the appearance of the fertilizer has color marks; and when the fertilizer is applied to crops, the fertilizer has the advantages of increasing yield and incoming, along with simple production method, convenient operation, low cost and high benefits.

A drought-resistant cultivation method for fruit tree includes such steps as choosing the drought-resistant variety and stock, reasonable close planting, pruning, applying fertilizer, frequently deep ploughing, building terraced fields and scale pits, covering film, planting grass, water-saving irrigation and applying hydroscopic agent and vaporation resistant agent.

The present invention discloses a double-effect water-protecting fertiliser and a preparation method thereof, wherein per 1000kg finished product of the double-effect water-protecting fertilizer is composed of the following components by weight: 40.0 to 80.0kg of biochemistry fulvic acid, 225.0 to 265.0kg of carbamide, 60.0 to 100.0kg of calcium ammonium nitrate, 200.0 to 250.0kg of mammonium dihydrogen phosphate, 80.0 to 120.0kg of magnesium kalium sulphuricum, 135.0 to 175.0kg of kalium sulphuricum, 0.5 to 3.5kg of borax, 2.0 to 6.0kg of copper sulfate, 10.0 to 18.0kg of zinc sulfate, 5.0 to 15.0kg of toluol methylpyrrolidine, 10.0 to 40.0kg of crosslinked polypropylene acidamide and polyacrylic acid potassium salt copolymer, and 10 to 40kg of attapulgite powder clay. the fertiliser not only meets the food supply required by the health growth of farm crops, is also capable of improving the utilization efficiency of the soil moisture and having non harm to human and animal husbandry without environment pollution.

The invention provides a method for directly sowing leymus chinensis seeds on a piece of soda saline-alkaline land, which comprises ridge forming, planting and irrigation management. The method comprises the following steps of: A, seed treatment; B, land preparation; C, drip irrigation zone setting; D, sowing; and E, irrigation. After the sowing of the leymus chinensis seeds, the ridges are covered by films and the land is irrigated immediately, wherein the films are 1meter wide; the amount of water used for initial irrigation is three times of that of water used for regular irrigation, and for later irrigation; and the water amount is determined according to the actual water content of soil. The ground drip irrigation and film-covering combined method for directly sowing leymus chinensis seeds improves water utilization rate, reduces water evaporation and provides good germinating and growing conditions for the leymus chinensis through the combination of leymus chinensis growing and modern irrigation technology. The method uses a soil moisture content monitoring device to monitor the water content in the post management period and irrigates according to the monitoring data so as to ensure the growth of the leymus chinensis under the condition of desirable water content and to improve the growth and tillering of the leymus chinensis. The leymus chinensis is a perennial plant and has high tillering capacity. When the coverage rate of the leymus chinensis reaches 80 percent after direct sowing, the leymus chinensis is allowed to grow naturally. The method creates remarkable long-term benefits and is a new method contributing to the development of the leymus chinensis growing industry.

A combined cultivation method for water and soil conservation for sloping farmlands relates to cultivation methods for water and soil conservation and solves the problem that using the single cultivation technique for holding water is unsatisfactorily effective. The combined cultivation method includes: firstly, adjusting ridges of sloping farmlands on downward slopes and inclined slopes under ridge plowing adjusted into transverse slope ridges, and adopting contour farming and belt planting; secondly, building ridges, and planting protective plant belts on the ridges; thirdly, subsoiling forfarming; fourthly, performing furrow damming; and fifthly, performing no-tillage conservation tillage. Furrow subsoiling and furrow damming are technically combined and integrated according to soil and weather characteristics of a black soil area, so that water and soil loss is reduced or avoided for sloping farmlands to the greatest extent, water and soil are conserved, water utilization rate isincreased, and crop yield is increased evidently. By the method, soil saturation and infiltration speed ratio is increased by 24.1% in processing treatment, water utilization rate is increased by more than 15%, crop yield is 30kg per mu, and 100 Yuan per mu is increased..

The present invention relates to Glomus mosseae 93-6 as one kind of efficient drought-resisting and high phosphate-tolerant nutrients bush mycorrhizal fungus and its production process. The Glomus mosseae preparation is prepared with kaoliang as host plant, mixture of zeolite and sand as culture medium. The dried preparation contains 40-65 spores in each ml. Glomus mosseae may be grown in various kinds of plants to improve nutrients absorption, raise drought resistance and promote growth of plant. Test shows that the present invention has excellent seedling strengthening and yield increasing effect on straw berry, rice, water melon and other crops.

The invention discloses a feedforward control method for the opening and closing time of an open channel water dispatching gate. A system using the method comprises a water delivery open channel and a control system. Regulators are arranged at the upstream and downstream of the water delivery open channel. A water intake is disposed at the downstream of the water delivery open channel, is close to channel buildings, that is, the downstream of the water intake is the regulator or weir. A water flow may generate backwater due to the impact of the buildings. The backwater influence in the channel divides the channel into two sub channel sections by means of a theory such as an ID model. A rising water wave from the upstream is equal to a falling water wave due to the water acquisition of the water intake. A storage volume change in the downstream of the water intake is zero, that is, no water abandoning operation is in the channel, which requires the water should be taken after the rising water wave arrives at the water intake and before the increment of the flow at the water intake reaches a set water taking amount. The feedforward control method improves the water use efficiency of the channel system, reduces a waste of water resources, and improves the economic benefit of the channel water supply.

The invention relates to a rainwater collection and water-saving irrigation pollution control system and method for a sloping field, wherein contour no-tillage straw mulching and contour plant hedgerow measures, rainwater collection cellars and gravity trickle irrigation equipment are comprised. The rainwater collection and water-saving irrigation pollution control method comprises the following steps of: designing 2-4 rainwater collection cellars from a slope top to a slope bottom according to the terrain of a river basin sloping field, wherein the sloping fields which is positioned above the rainwater collection cellars and subjected to the contour no-tillage straw mulching and contour plant hedgerow measures are taken as rainwater collection surfaces, and the rainwater collection cellars are mainly built in a semi-underground way, provided with two rainwater outlets along the ground and cellar bottoms and respectively connected with 2-4 gravity trickle irrigation equipment; and carrying out partitioning gravity trickle irrigation on sloping farmlands positioned below the rainwater collection cellars. The invention can effectively reduce the pollution of water losses and soil erosion on a water body by carrying out space-time integrated regulation and control on the water losses and soil erosion of the sloping field and the redistribution of collected rainwater according to the change of raining time and the characteristics of the sloping field, and solve the problem that the sloping field can not be irrigated in a dry season through the redistribution of the collected rainwater, thereby enhancing the multiple-cropping index and the output of crops of the sloping field; and in addition, the invention can be widely used for the integrated management and control of therainwater for the sloping fields in the southwest regions in China.

The invention relates to a cotton cultivation method. The method comprises the following steps: sowing of cotton seeds and laying of drip irrigation pipes: sowing three rows of cotton seeds under a mulching film, laying a drip irrigation pipe on each row; drip irrigation of seedling emergence period water; drip irrigation of bud period water, wherein the maximum water holding amount of the soil in the bud period is 70%-80%, the drip irrigation liquid of the bud period water is clear water or a water and fertilizer mixed solution; drip irrigation of flowering and boll-setting period water, wherein the maximum water holding amount of the soil in the flowering and boll-setting period is 80%-90%, and the drip irrigation liquid of the flowering and boll-setting period water is a water and fertilizer mixed solution; drip irrigation of boll opening period water, wherein the maximum water holding amount of the soil in the boll opening period is 60%-70%, and the drip irrigation liquid of the boll opening period water is clear water or a water and fertilizer mixed solution. The method also comprises the steps: flowering and boll-setting period chemical topping, flowering and boll-setting period cotton spindling controlling, and ripening and defoliating. Water and fertilizer are saved, water, fertilizer and sunlight can be fully utilized by the cotton, the mechanical production is achieved, manpower and material resources are saved, and finally the cotton yield is improved.

A potato planting method comprises the following steps of (a), preparation before planting, (b), planting, (c), field management and (d), harvesting. By using the planting method, planted new Daping level potatoes are high in yield and high in disease resistance, and the shortcoming that the new Daping level potatoes planted by using the traditional planting mode are not high in yield, late blight resistance is not high and the like is overcome. Compared with the traditional cultivation technology, the potato planting method has the advantages that the yield and the quality of potatoes are greatly improved, the yield is improved by 15%, the dry matter content is increased by 12.53%, the reducing sugar content is increased by 20.00%, the soluble protein content is increased by 6.76%, the starch content is increased by 19.07%, and the Vc content is increased by 18.39%; and in 3-5 days before the late blight center diseased or infected plants of the potatoes are found out, the blight of the potatoes can be effectively prevented and cured by using bactericide, and the disease rate is reduced by 27.89%.

The invention provides a spray water with long-term moisturizing ability and a preparation method thereof. The dosage of each component of the composition is calculated by mass percentage: moisturizing agent, 5%-10%; bio-rich film, 0.1%- 5%; carnosine (β-alanyl-L-histidine), 0.5%-1.0%; asiaticoside, 0.01%-1.0%; yeast extract, 0.05%-10%; nicotinamide (vitamin B3 ), 0.1%-2.0%; rose flower oil, 0.01%-1.0%; plant extract, 1%-10.0%; antibacterial polyol, 0.1-1.0%; purified water, up to 100%; Get; long-lasting moisturizing effect.

The invention discloses a water and fertilizer integration technology mode suitable for north tea gardens, and belongs to the technical field of tea tree cultivation. The mode includes construction of a fertilizer formulation pool, an installation method of a venturi and a water meter, main water pipe laying, branch pipe micro-spraying tape placement, high-pressure water spraying and low-pressure fertilization technical measures and the like. The mode is characterized by comprising the steps: dissolving a water soluble fertilizer in the fertilizer formulation pool, and placing a micro-spraying tape between two rows of tea trees; through controlling a switch of the venturi, carrying out spray irrigation water application in the high water pressure and the high flow quantity, and carrying out drip irrigation fertilization in the low water pressure and the low flow quantity; after fertilization is completed, carrying out spray irrigation again; and changing a fertilization mode of 'one-time base fertilizer application and three-time top application' into a mode of 'one-time base fertilizer application and six-time top application'. Compared with the prior art, spray irrigation is carried out in the high water pressure and the high flow quantity, so that requirements of tea garden irrigation are met, and a tea garden 'microclimate' is regulated and controlled; drip irrigation of the water soluble fertilizer is carried out in the low water pressure and the low flow quantity, so that the fertilizer is allowed to be farthest distributed around tea tree rhizospheres, and fertilizer absorption of the tea trees is facilitated; and at the same time, a past tea garden three-time top application is changed into multi-time top application, continuous fertilizer requirements of the tea trees are met, and the purpose of saving water and the fertilizer is achieved.

The invention is applicable to the technical field of farmland irrigation, and provides an irrigation control method and device. The method includes the following steps that weather information, collected by a meteorological station module, of a to-be-irrigated region and initial soil moisture information, collected by a soil moisture acquisition module, of the to-be-irrigated region are obtained;the growth state of planting crops in the to-be-irrigated region and the running state of an irrigation device in the to-be-irrigated region are obtained; according to the weather information, the initial soil moisture information and the growth state of the planting crops, an irrigation plan of the to-be-irrigated region is determined; according to the irrigation plan and the running state of the irrigation device, an irrigation command is sent to a control unit, and the irrigation command is used for instructing a control unit to control the irrigation device to carry out the irrigation plan. After adopting the above scheme, the irrigation condition of a farmland can be determined, and the soil moisture is maintained in the optimal range of crop growth.

The invention discloses chili-controlled release fertilizer and a preparation method thereof and belongs to the technical field of fertilizer preparation. The chili-controlled release fertilizer comprises, by weight, 60-120 parts of coating materials and 200-1200 parts of fertilizer particles. The chili-controlled release fertilizer is prepared through the steps of smashing, extracting, filtering, concentrating, fermenting, pelleting, drying, cooling, coating and the like. The chili-controlled release fertilizer is moderate and stable in controlled release rate and balanced in nutrient, the wastage rate of the fertilizer can be effectively lowered, the fertilizer utilizing efficiency is improved, fast and healthy growth of chili seedlings is promoted, the chili yield is increased, meanwhile, diseases and pests can be effectively prevented, soil environment is improved, and ecological environmental protection is kept. The preparation method of the fertilizer is easy to operate and favorable for application and popularization.

The invention relates to an environment-friendly drop irrigation water-saving cultivation method for a winter wheat / summer maize crop rotation system. A winter wheat / summer maize planting spacing anddrop irrigation belt arrangement mode is developed, a water and fertilizer integrated implementation scheme for water conservation and fertilizer saving of the winter wheat / summer maize crop rotationsystem is built, and different agricultural water saving methods, drop irrigation platform automatic control systems, precise positioning tractors and multifunctional all-in-one machines are also used, so that an environment-friendly drop irrigation water-saving cultivation technology for the winter wheat / summer maize crop rotation system suitable for north China plain is formed. The water and fertilizer utilization efficiency is improved, the irrigation cost is reduced, and the effects of increasing the yield and improving the efficiency are achieved.

The invention relates to a planting method for crops, in particular to a wide-row flat planting protective tillage planting method for maizes. The planting method comprises the following seven steps of: performing land preparation, sowing, rolling after sowing, weeding by pesticides, subsoiling mechanically and performing side deep fertilizing, preventing and controlling diseases and insect pestsand harvesting mechanically. In the planting method, the conventional 60-centimeter uniform ridge planting mode is changed into a flat planting mode of 80-centimeter row pitch and 20-centimeter row spacing, and ventilating and light-transmitting space of the crops is increased; the conventional shallow intertillage and shallow fertilization mode is changed into a mechanical deep scarification anddeep topdressing mode, namely the conventional three-shovel three-time intertillage management and shallow fertilization operation is changed into one-time deep scarification and deep topdressing operation, so operation links are reduced, and the production cost is reduced; the conventional sowing mode is changed into a zero-tillage sowing mode, so the evaporation of soil moisture is reduced, andthe capacity of drought resistance and soil moisture conservation is improved; the conventional mode that harvested low stubbles are crushed to return to a field into a mode that mechanically-harvested high stubbles are rotten naturally to return to the field; and before sowing, seeds are processed by using a plasma seed processing technology to improve the germination percentage of the seeds.

A water and fertilizer retaining agent of soil for increasing the yield of crops (more than 12%) is proportionally prepared from corn stalk, potassium bihydrogen phosphate, diammonium phosphate, rape dregs, urea, high-fat film, and the mixture of crop' s straw and stalk. Its preparing process is also disclosed.

The invention provides an efficient rotation cropping method for corn and soybeans in the Northeast region, and relates to an efficient rotation cropping method for corn and soybeans. The mechanized and scale corn-soybean rotation cropping method is formed by taking whole process mechanization as a basis, taking scale application as a premise and playing the traditional advantages of planting the soybeans in the Northeast cold region. The method comprises the steps of 1 land preparing in autumn, 2 ridging in autumn, 3 compacting, 4 variety and sowing time selecting, 5 fertilizing, 6 chemical weeding, 7 intertillage managing, 8 pest controlling and 9 lodging preventing through chemical control. According to the method, fertilizer can be saved, pesticide application amount can be decreased, the water use efficiency is improved, the grain yield is increased, and the grain production capacity is stabilized. The method is applied to the field of crop cultivation.

The invention discloses a cotton trace irrigation, water and fertilizer integrated efficient cultivation method in arid desert areas. The method sequentially includes the steps of land selection, arrangement of a trace irrigation system, soil preparation, seed selection, seed processing, film mulching and sowing, field water and fertilizer regulation, disease and insect pest prevention, chemical regulation, and harvesting at proper time. The method is characterized in that the core of the technology is that cotton film mulching and sowing and underground trace irrigation, water and fertilizer integration make roots of cotton in a moisture and nutrient absorbing state all the time in the growth period; meanwhile, surface evaporation is reduced, water and fertilizer resources can be reasonably and efficiently utilized, and field management comprises irrigation, topdressing, disease and insect pest prevention and the like. By the adoption of the trace irrigation, water and fertilizer integrated efficient cultivation method, water and fertilizer management is carried out on underground root layers, surface evaporation is reduced, the nutrient loss is reduced, and the water and fertilizer utilization efficiency is greatly improved; compared with the prior art, the water utilization rate can be increased by 30-40%, the ecological environment is protected, the cotton yield is effectively increased, and the effects of high yield and high efficiency are achieved.

The invention discloses a method for researching a partial root drying irrigation technology of woody fruit trees. The research method comprises the following steps of: manufacturing a root-zone root-splitting box, planting a tree seedling, performing partial root drying irrigation and the like. The root-splitting box is prepared from transparent organic glass or toughened glass with the thickness of between 2 and 3cm, the length, the width and the height of the box are all between 40 and 60cm, four small boxes in which no water can be leaked are uniformly partitioned by using a homogeneous material inside the box body, the bottom of each small box is provided with a small hole with the diameter of between 2 and 3cm, a main root of the tree seedling is cut off before the planting, and lateral roots are uniformly divided into four parts and are planted into the four partitioned small boxes; and the periphery of the root-splitting box is wrapped with a foam board with the thickness of between 8 and 10cm, and the research on partial root-zone fertilizer water is carried out after young sprouts of a fruit tree grow to 15cm. The method can be used for researching the dynamic influence of the supply space and consumption of fertilizer water of different rooting zone volumes of the woody fruit trees on the growth of tree bodies and root systems, and provides convenience for realizing the research on water conservation, fertilizer conservation, improvement on moisture utilization rate and the like.

The invention discloses a comprehensive water saving regulation method for fruit trees and vegetables comprising the following steps: soil water retaining agent is applied to the root zone soil of planted crops; plant antitranspirant is sprayed on the foliar of the crops; soil structural modifier is applied to the near surface top soil at the root zone of the planted crops. The method has the advantages that, the embodiment of the invention takes soil and crops as a whole; through combined application of the three agents of soil water retaining agent, plant antitranspirant and soil structural modifier, stereo and comprehensive regulation of the water status of soil and crops can be realized, and field water utilization efficiently is improved.

The invention discloses a soil accumulating-enlarging capacity-expanding agent and manufacturing method of building rubbish, which comprises the following parts: 35%-45% building rubbish powder, 10%-20% potassium dihydrogenphosphate, 15%-20% diammonium hydrogen phosphate, 10%-15% rape slag, 1%-3% aquacare, 1%-2% hyperlipifilm and 10%-18% composite straw powder. The making method comprises the following steps: removing metal, wood dust, plastic impurity of building rubbish; grading; maintaining waste brick slurry and mud; grinding below 1mm; sieving into 20-order; blending; stirring; graining; packing. The quantity of each hectare is 750kg-1500kg, which improves water utility by 10% in the drought and semi-drought area.

The invention provides a preparation method of composite envelope water retaining and slowly-releasing urea. The water retaining and slowly-releasing urea of a dual-layer film structure is formed with large granular urea as a kernel, a chitosan-polyving akohol composite film as an inner coating layer and a water-retaining agent as an outer coating layer, and the water retaining and slowly-releasing urea has excellent water retaining and nutrient slowly releasing properties. The method is characterized by comprising the steps that the large granular urea with the diameter of 2-5 mm is put into a coating device, the urea rolls in the coating device and is heated to be 80-100 DEG C, chitosan-polyving akohol coating fluid is sprayed to the surface of the urea, the water-retaining agent of the grain size of 0.075 mm is added, epoxy chloropropane with the concentration of 0.5% is sprayed by a spraying gun with the intensity of pressure larger than or equal to 0.4 MPa for the surface cross-linking reaction, and finished fertilizers are obtained after drying is performed. The water retaining and slowly-releasing urea is simple in production process, low in investment cost, and easy in industrial production. No organic solvent is used in the production process, and secondary pollution caused by using organic solvents is avoided accordingly.

The invention mainly discloses an overpass rainwater recovery system and its installation method. Its technical proposal includes a bridge deck and a bridge pier. There is a first drainage pipe connected to the filter, the filter is connected to the underground water tank through the clean water pipe, the top of the pier is provided with a first collection bucket, and the bottom of the pier is provided with a second collection bucket connected with the first collection bucket, The second collecting bucket is connected with the filter through the downpipe. The invention has simple structure and convenient installation, can quickly collect and store rainwater generated during rainfall or road sprinkling, improve drainage efficiency, filter and purify rainwater before storage, improve water resource utilization efficiency, and solve water pollution problems. The collecting bucket and the second collecting bucket prevent rainwater from entering the inside of the bridge pier, effectively preventing rainwater from corroding the bridge pier or affecting the appearance, and are easy to apply and promote.

The invention belongs to the technical field of ecological agriculture and in particular relates to a soil improver prepared from waste materials of an ecological fermentation bed as well as a preparation method of the soil improver. The soil improver prepared from waste materials of the ecological fermentation bed is prepared from the following components in parts by mass: 90-100 parts of waste materials escaping from the ecological fermentation bed, 20-30 parts of wheat straws, 20-30 parts of corncob powder, 10-15 parts of gulfweed, 10-15 parts of a chitin liquid, 3-4 parts of plant ash, 1-3 parts of shell powder, 3-5 parts of silkworm excrement, 5-10 parts of bentonite, 1-5 parts of seaweed soil, 3-5 parts of humic acid, 0-1 part of microelements and 1-3 parts of an enzymic preparation. The soil improver provided by the invention has the advantages that the utilization of the waste materials escaping from the ecological fermentation bed in a pig raising process is increased, the structure and fertility of soil are improved, and the soil improver is environmental-friendly and ecological and low in price.

The invention relates to a crop growth regulating preparation which belongs to the technical field of crop chemical drought resistance and particularly provides an organic nutritional drought-resistance agent and a preparation method thereof. The organic nutritional drought-resistance agent is used for improving the drought resistance in crops in a planting period. In the invention, arginine, cystine, aspartic acid, vitamin B1 and vitamin B2 serve as nutritive components, and hexanoic acid 2-(diethylamino) ethyl ester, dimethyl sulfoxide, salicylic acid, choline chloride and betaine form a material combination capable of regulating physical activities of crops. The two kinds of components are used in combination, so that organic nutrients the plants lacks under a drought condition can be supplied directly, plant type can be regulated, the drought resistance in the crops can be improved, and the yield of the crops is increased. The preparation can be used for soaking seeds or sprayed or sprinkled.

The invention provides a real-time dynamic monitoring system of a remote irrigation and drainage system based on internet. The system comprises a data collection unit which comprises a meteorologicalfactors module, a canal system water level-flow module, a field soil moisture content module, an underground water level module and a drainage flow module arranged in the field, wherein the data collection unit is used for acquiring parameters required by the irrigation and drainage system; a storage system comprises a remote receiving terminal, a cloud storage module and a data visual analysis module; a model system automatically acquires the required parameters through a cloud platform in a cloud storage module, and performs data processing, wherein the model system comprises a parameter calibration and inversion module, a crop water need prediction model, an irrigation system optimization model, an irrigation area water balance computation module and a water usage management module. Theremote, intelligence and high efficiency of the irrigation area and basin water resource monitoring technology are realized by utilizing the modern information technology, the technical support is provided for the hydraulic engineering modern construction and water resource intelligent management, and the modern management level and the water resource utilization efficiency of the irrigation areacan be improved.

The invention discloses a soil activating agent and a preparation method thereof. The soil activating agent is prepared from 8-12 parts of modified zeolite powder, 30-50 parts of biogas residues, 20-30 parts of straw powder, 10-15 parts of rice bran, 5-10 parts of rape seed cakes, 3-8 parts of humic acid mineral powder, 2-6 parts of swelling vermiculite powder, 1-5 parts of shell powder, 2-4 partsof gypsum powder, 0.5-1.5 parts of kieselguhr, 0.4-0.8 part of carboxymethyl chitosan, 0.3-0.7 part of leavening agent, 0.2-0.6 part of microelement additive and 3-7 parts of organic fertilizer. Theprovided soil activating agent can effectively improve soil structure, activate edaphon, enhance soil fertility, improve the soil capacity of preserving moisture and fertility, facilitate forming of soil aggregates, and be long in lasting time of preserving moisture and fertility and aggregating capacity, simple in preparation, low in cost, easy to operate, green and environmentally friendly.

The invention discloses a sweet potato controlled release fertilizer and a preparation method thereof, and belongs to the technical field of fertilizer preparation. Raw materials of the sweet potato controlled release fertilizer comprise, by weight, 60-120 parts of a coating material and 200-1200 parts of fertilizer particles, and the sweet potato controlled release fertilizer is prepared through the steps of crushing, extracting, filtering, concentrating, fermenting, granulating, drying, cooling and packaging. The sweet potato controlled release fertilizer has the advantages of moderate and stable controlled release rate, balanced nutrition, effective reduction of the loss rate of fertilizers, promotion of rapid and healthy growth of sweet potato, improvement of the output of the sweet potato, effective prevention of diseases and pest damages, and soil environment improvement.