61results about How to "Return to field" patented technology

The invention belongs to the technical field of seedling growing tools, in particular discloses a full-degradation high-manurial-effect seedling growing pot which is made by mould unloading and mold hanging after heat pressing vulcanization of straw powder, coal ash, adhesives, curing agent and waterproofing agent which are mixed, agitated and then filled into a die. Because the main materials of the seedling growing pot substantially include straw powder and coal ash, the purpose of returning straws to fields is achieved, and fertilizer elements such as kalium and phosphor and metallic elements such as ferrum, calcium, magnesium, zinc, titanium, sulfur and the like contained in coal ash can be utilized, which facilitates reconstruction of soil. Besides, all raw materials of the seedling growing pot can be degraded to fertilizers such as organic matter, humic acid, phosphate fertilizer, potassium fertilizer and the like, which can further improve the fertility of soil and facilitate the growth of seedlings.

The invention discloses a dry farming direct seeding planting method of rice, which comprises the steps of preparing sprinkling irrigation equipment: the lifting micro-sprinkling irrigation equipment is buried under to-be-planted ground for 30-40cm; processing a field: straws of last stubbles of crops on the to be planted ground are cut into sections, the lengths of the straw sections are 2-20cm, the straw sections are broadcast in soil, a base fertilizer is applied on the soil, and the soil is subjected to ploughing and rotary tillage; preparing rice seeds and seeding: the selected rice seeds are sown on the processed soil uniformly, and then the soil is compacted; and performing sprinkling irrigation: the lifting micro-sprinkling irrigation equipment buried under the ground is used for irrigating the soil sown with the rice seeds, and the water content of the surface of the soil is 40-60%. Therefore, the precision irrigation to the crops is realized; excess water accumulation in the rice field is avoided; and the utilization ratio of water resources is increased. In addition, the straws are turned into organic fertilizers with the passage of time; straw turnover is realized indeed; the method contributes to improving the yield and quality of grains; and environmental pollution due to straw burning is avoided.

The invention discloses a method of salt-isolating cultivation improvement of saline-alkali soil through straw and relates to the technical field of saline-alkali improvement. Rising channels of capillary water in high-salt soil is cut off through a straw salt-isolating filter layer, and salt washing is performed on the saline-alkali soil by using rainfall or irrigation water. Meanwhile, humus formed by the decomposition of straw and organic fertilizers is used for adsorbing salt ions, neutralizing the alkali of the soil and improving the soil microenvironment. The structure of the method comprises a straw salt-isolating filter layer which is laid on the upper part of the saline-alkali soil, an organic fertilizer layer at the upper part of the salt-isolating filter layer and a cultivationlayer at the uppermost part from bottom to top. Also, deep ditches are dug between two ridges, and isolation ditches are dug around improved areas. In the method, borrowed soil is not needed, washingand salt washing of the salt soil can be realized with the aid of natural rainfall and irrigation water after covering the straw isolating layer with soil on site, and the cost is reduced. The methodof improving saline-alkali soil is suitable for various saline-alkali soil environment conditions, is a high-efficiency and easy-to-operate method for saline-alkali soil improvement and horticulturalplant cultivation. In addition, the crop straw is used as the salt-isolating layer, so that the reuse of a large amount of straw can be realized to improve the organic matter of the soil, and meanwhile, the method is beneficial for solving the problem of straw burning, and reducing the environmental pollution.

The invention discloses a method of optimizing and returning to field of straw of a cold region rice field, and relates to the field of returning to fields of straw of the rice fields. The method aims to solve the technical problems that according to a traditional method of returning to a field of straw, the effect of returning to the field is poor, during a process of returning to the field of the straw, the labor input of a farmer is increased, and the rice transplanting quality is affected. The method comprises the steps of (1) harvesting, wherein the straw is evenly dispersed in the field during harvesting; (2) land preparation and stubble burying, (3) irrigation for field steeping, stubble burying and land leveling and (4) rice transplanting and fertilizer application. Through the method, not only can returning to the field of the straw be achieved in the cold region rice field to achieve a purpose of land fertility betterment, but also negative environment effects caused by mass burning of the straw are alleviated, and fertilizer saving, the high yield, the high quality, the high efficiency and the ecological safety of the rice field are achieved; the method is used for returning to the field of the straw in a cold region.

The invention discloses a nitrogen fertilizer immobilization process using an active soil and flocculant / adsorbent composite material. Attapulgite clay is chemically modified by irradiation to improve dispersibility and can form a multilayer micro- / nano-scale network structure by self-assembly in a water-poor environment under the action of flocculants, the adsorbed nitrogen fertilizer together with the non-adsorbed nitrogen fertilizer is embedded inside the network structure by use of biological carbon with high adsorbability, so that the nutrients of the nitrogen fertilizer are effectively stored in the network structure to prevent free migration of the nutrients and control the loss of the nutrients to the environment. The process can effectively reduce the migration and loss of nitrogen elements, increase the utilization efficiency of chemical fertilizers and reduce the environmental pollution caused by the loss of nitrogen elements. The process can achieve the effects of reducing the discharge of fertilizers, increasing the utilization efficiency of nitrogen fertilizers, reducing the consumption of chemical fertilizers, protecting the environment, reducing the cost and simplifying the process, and is significant in controlling eutrophication non-point pollution of water bodies and protecting the ecological environment.

The invention discloses a rice micro-ridge mixed sowing cultivation method. The method comprises the following steps: S1, draining water in the mature period of preceding crops until a harvester can work; S2, harvesting the preceding crops, reserving stubbles, smashing straw of the preceding crops and then scattering smashed straw on the reserved stubbles so as to form rhizosphere layers for ricegrowth; S3, performing ditching in the field to form ecological ditches; and S4, flattening the vertical stubbles and the crushed straws on the compartment surface to form a lower cushion surface, forming a seed, fertilizer and mud compound into a ridge shape, enabling the compound to fall on the lower cushion surface to form ecological ridges, and forming a plurality of ecological ridges betweenadjacent ecological ditches, wherein the seed, fertilizer and mud compound is obtained by uniformly stirring and mixing rice seeds, a chemical fertilizer and mud in a mass ratio of (6-14):(50-70):(6000-10000). Firstly, the ecological ridges are used as a medium to wrap organisms and vegetative bodies and is heat-insulating, moisture-preserving, water-permeable and air-permeable; and secondly, theecological ridges are used as a donor to provide water nutrition for organism vegetative mass. The seeds which are subjected to accelerating germination and budding in the ridges grow faster than weedseeds in the ridges and outside the ridges, and roots and leaves grow smoothly.

The invention discloses a preparation method of an organic fruit and vegetable cultivation medium. The preparation method comprises the steps of preparation of modified wheat straw, preparation of modified corn straw, preparation of bamboo charcoal, modification of bamboo charcoal and fermentation and compost. Acid modification of the wheat straw, glyoxal modification of the corn straw and alkalimodification of the bamboo charcoal are conducted in sequence, then ingredients and bacterial agents are added to farm livestock manure to conduct fermentation, and the organic fruit and vegetable cultivation medium is prepared after compounding. The preparation method has the advantages that agriculture by-products are used for preparing the cultivation medium, the environment is protected, fullutilization of materials is achieved, and the economic value is improved; heavy metal ions in the medium can be eluted to the bottom layer of the soil, and thus the content of the heavy metal ions inthe soil is lowered; the cultivation medium provides nutrient elements such as medium trace elements, organic matters and humic acid, further has the functions of improving the medium water binding capacity and the medium structure simultaneously, and is an efficient and environment-friendly organic fruit and vegetable cultivation medium.

The invention provides a method for orchard deep fertilization by using straw fiber fertilizer pipes, belongs to the technical field of straw comprehensive utilization technology and fertilization technology integration, and mainly solves the problem of surface fertilization of an orchard in the prior art. The method includes four steps that soil testing is conducted, the straw fiber fertilizer pipes in which a fertilizer is mixed are prepared, the fertilizer pipes are inserted into pre-drilled fertilization holes, wherein the distribution, number and depth of the fertilization holes are changed according to the age of trees, and the depth of the fertilization holes is 300-600 mm; the corresponding fertilizer pipes are matched with the fertilization holes, various nutrients can be added into hollow straw long fiber rods to prepare fertilizer rods to be inserted into the corresponding fertilization holes, the fertilizer rods need to be arranged in the annular band of water dripping of tree crown, and finally, reasonable hole fertilization and irrigation are conducted. The method achieves the effect of efficient use of water and fertilizers, and provides the technical support for development of fruit industries in arid regions.

The invention discloses a corn straw stack retting fermentation ecological organic fertilizer returned to a field and a production method thereof, and relates to the technical field of microbial organic fertilizer preparation. The corn straw stack retting fermentation ecological organic fertilizer consists of the following raw materials: a fermentation raw material and a composite strain, the fermentation raw material comprises fresh livestock and poultry manure and corn straw. The raw materials are taken according to a certain ratio and processed according to the production method for the corn straw stack retting fermented ecological organic fertilizer returned to the field, so that the preparation can be completed. After the technical scheme is adopted, the invention has the beneficial effects that centralized on-site stack retting and on-site field returning treatment are carried out in the center of a large planting field, so that costs for transferring, crushing and field returning of straw are greatly saved. The straw returning cost per mu can be controlled within 150 yuan.

The invention discloses a biomass character paper preparation method and a use method thereof and belongs to the field of agricultural cultivation. The biomass character paper preparation method disclosed by the invention comprises the steps: adding a certain amount of clean water into cut plant straws (corn straws, rice straws, cotton straws, hemp straws and wheat straws), and steaming under a high temperature to obtain primary slurry after steaming; adding weighed starch and agricultural resin into the primary slurry, evenly mixing, putting into a pulping machine to be pulped and sieving anobtained product after pulping; adding weighed nutritional ingredients and microelements, evenly mixing to obtain third-level slurry, injecting into a model net and drying and shaping to obtain primary biomass character paper; coating the front side of the primary biomass character paper with nutritional ingredients, microelements and organism nutrient solution, coating the back side of the primary biomass character paper with glue and putting in a drying cylinder to be dried to obtain the biomass character paper. A simplified seedling growing processing is achieved, modern rice seedling growing and gardening seedling growing are fundamentally reformed, and conveniently producing large-batch seedlings for vegetables and flowers is ensured.

The invention discloses a comprehensive energy utilization system for a farm, and belongs to the technical field of distributed energy application. The system comprises a feeder, a manure-grass separator, an acidification pool, a fermentation tank, a biogas slurry storage pool, a solid-liquid separator, a desulfurization and dehydration system, a gas storage tank, a generator set, a waste heat boiler, a lithium bromide unit, a solar collector, a hot storage tank, a solar photovoltaic module, a water pump, a reservoir and a torch, wherein the livestock and poultry manure is treated intensively,the biogas and solar energy are combined organically to produce cold, heat and electricity and meet farm electricity, production heat, domestic water, domestic heating, air conditioning refrigerationand other demands, the biogas slurry and a solid organic fertilizer can produce to replace the use of pesticides and fertilizers, so that livestock and poultry manure can be turned into wealth.

The invention discloses a formula of bacterial organic fertilizer and a preparation method thereof. The bacterial organic fertilizer is characterized by being prepared from, by weight, 40-60% of crop straw, 15-25% of animal waste, 5-10% of carbon slag, 5-10% of decomposed grass, 3-8% of compound microorganism fermentation inoculum and the balance medicinal materials, wherein the total weight percent is 100%. The formula of the bacterial organic fertilizer and the preparation method thereof have the advantages that the bacterial organic fertilizer is high in nutrition value, operation is easy and can be performed at home, energy is saved, the bacterium production speed can be increased, straw turnover can be achieved, the bacteria can be prepared into the natural fertilizer, the bacterium production output can be increased, and energy can be saved.

The invention discloses a summer soybean simplified cultivation method and belongs to the technical field of soybean planting. The method comprises the steps of fine breed selection, sowing in good time, wheat straw utilization, seed fertilizer application, shallow rotary tillage and compacting, weed killer spraying, field management and the like. The method is easy and capable of shortening farming time. By the adoption of the method, the rate of emergence of soybean is quite high, seedlings are uniform and strong, and a foundation is laid for the high and stable yield of soybean; production cost is low, and then cost saving and effectiveness increasing are achieved; by means of straw mulching, the organic content of soil is increased, soil fertility is improved, the economical environment is protected, resource utilizing efficiency is improved, and sustainable agricultural development is promoted. The method has vital practical significance in developing soybean production and guaranteeing food security in China.

The invention belongs to the field of agricultural fertilizing equipment, and particularly provides a stubble cane pre-emergence fertilizing machine and application thereof. The stubble cane pre-emergence fertilizing machine comprises a rack, a round disc knife, a transverse cutting device and a fertilizing device are arranged below the rack in sequence, and the transverse cutting device comprisesa longitudinal cutting board and transverse cutting knives arranged at the two sides of the longitudinal cutting board; the round disc knife is driven by a driving device to backwards rotate. On thepremise of sugarcane leaf land returning, the purpose of disposable ridge breaking, bag loosening and fertilizing can be achieved, and the field work efficiency is improved. Stubble cane post-emergence fertilizing is changed into pre-emergence fertilizing, sugarcane seedlings cannot be injured, soil beside sugarcane bags can be cut and loosened by the transverse cutting knives, air ventilation isfacilitated, and the seedling emergence rate is increased. Fertilizer is deep applied in advance, soil covers the fertilizer, nutrients are spread into soil, uniform absorption of root systems of sugarcanes is facilitated, sugarcane leaves cover the ground surface, water evaporation can be reduced, more rainwater can also be permeate the soil, and water and soil loss is reduced.

The invention discloses a method for producing a fertilizer from paper-making black liquor. The method comprises the following steps of: adjusting strongly alkaline black liquor into weakly alkaline or neutral black liquor with the pH value of between 7 and 9; evaporating and concentrating the black liquor; concentrating the black liquor until the solid content is between 20 percent and 90 percent; and charging the concentrated black liquor into a pelletizer for guniting and pelletizing to produce fertilizer particles. By adopting the method, the black liquor can be treated and purified to produce pure water steam, and organic matters and the like, which are good for crops, in the black liquor can be prepared into the fertilizer, so that the value of the black liquor is brought into full play. Moreover, the process of the method is easy, purification treatment is performed completely, and environmental pollution is avoided. The invention has the characteristics that: 1, investment is small, and the black liquid produced by pulping of wheat straw hood and straw in a small plant is up to standard; 2, purification treatment is performed completely, and environmental pollution is avoided; 3, straw returning is realized, and an ecological economic chain is formed; 4, deforestation caused by paper making is reduced; and 5, a process is simple, and running cost is low.

The invention discloses a pineapple leaf pulverizing device and a pineapple leaf pulverizer, and relates to the technical field of agriculture. Pineapple leaves can be pulverized into easily degradable fiber fines to return to field, so the utilization rate of the pineapple leaves is improved. The pineapple leaf pulverizing device comprises a cutter head group and a lifting mechanism for lifting the cutter head group, wherein the extension direction of the cutter head group is vertical to the forward direction of the pineapple leaf pulverizing device, and the cutter head group comprises a plurality of cutter heads; each cutter head comprises a circular cutter head body and a plurality of blades, and the blades are arranged on the periphery of the cutter head body at a certain angle between the blades and the radial direction of the cutter head body; axes of the cutter head bodies of the cutter heads are positioned on the same rotating shaft, and the lifting mechanism comprises an erected first fixing rack; the upper end of the first fixing rack is hinged with an obliquely downward extending first telescopic rod, and the lower end of the first fixing rack is hinged with a connecting rod matched with the first telescopic rod; the end part of the first telescopic rod is hinged with the middle part of the connecting rod, and the tail part of the connecting rod is hinged with a first connecting rod connected with the corresponding cutter head group.

The invention provides a method for producing seedling growing containers from long fibers of straw, and belongs to the technical field of agricultural seedling growing containers. By the aid of the method, problems in the aspect of straw returning and utilization mainly can be solved. The method is characterized by comprising four steps of collecting the straw; manufacturing straw smashed materials; proportionally mixing and stirring the straw smashed materials, bentonite and polyacrylamide with one another to obtain mixtures; carrying out spinning forming on the mixtures. Smashing processing refers to smashing the straw by the aid of a hammer mill with a rubbing function, the straw can be completely smashed at one step without screen cloth, water is added into the polyacrylamide, and the polyacrylamide is diluted to obtain adhesive; the lengths of long fiber strands of the straw range from 2.0 mm to 300 mm. The method has the advantage that eggs, soil-borne diseases and weed seeds can be eliminated by the seedling growing containers produced by the aid of the method.

The invention discloses a method for planting corn in saline-alkaline soil, comprising the steps of deeply turning over, irrigating for washing, making ditches, covering with organic base fertilizer and inorganic base fertilizer, shallowly turning cover, making drain ditches, sowing corn, irrigating for washing once a month in the growth stage of corn, and applying a nutrient solution after each irrigation for washing until the corn is mature, wherein the organic base fertilizer is made by mixing biogas slurry, crop stalks, methyl cellulose and soap powder at a mass ratio of (300-500):(1000-2000):(0.5-1):(0.5-1), and the nutrient solution is made by mixing biogas slurry and crop stalks at a mass ratio of (1000-2000):(300-500), fermenting at 30-35 DEG C for 10-15 days, and filtering to obtain filtrate. By increasing the amount of organic fertilizer to be applied herein, the amount of the inorganic fertilizer to be applied is decreased; suitable soil improving measures are taken, less salt is accumulated during corn planting, and yield of corn per mu is increased. In addition, both the organic fertilizer and nutrient solution used herein are prepared mainly from stalks, returning stalks to field is achieved, and utilization rate of stalks can be increased.

The invention relates to environment protection equipment convenient for returning corn straw into the field. The environment protection equipment comprises a bottom plate, a straw smashing device, afertilizer applying device, a distributing device and a soil turning device, the straw smashing device is arranged on the right side of the bottom plate, the fertilizer applying device is arranged onthe bottom plate on the left side of the straw smashing device, the distributing device is arranged between the fertilizer applying device and the straw smashing device, and the soil turning device isarranged on the left side of the bottom plate. Added corn straw is cut and smashed through the straw smashing device; fertilizer is rotated and uniformly distributed through the fertilizer applying device, so that spraying area and scattering uniformity of the fertilizer are increased; distribution area of the straw and the fertilizer on the ground is increased through the distributing device; the straw and the fertilizer are turned into soil through the soil turning device to achieve the objective of returning the straw into the field.

The invention discloses a fertilization method for improving nitrogen element utilization rate of flue-cured tobacco. The fertilization method comprises the following steps: (1) leveling the land and applying basic fertilizer; (2) transplanting with water and fertilizer; (3) applying a hole-applied fertilizer; (4) applying foliage fertilizer; (5) applying after-manuring; and (6) applying balanced fertilizer. The fertilization method can effectively improve nitrogen element utilization rate of flue-cured tobacco, reduce production cost, and improve quality, yield and economic benefits of the tobacco leaves; charcoal made of rice straw is applied, straws return to the field, and the problem that the conventional firing method for treating rice straws pollutes the environment can be solved. The fertilization method can improve physicochemical property and fertility of the soil for planting tobacco.

The invention discloses a mechanical device capable of returning crop straw to a field in place through straw cutting. The mechanical device comprises a harvesting unit, wherein the harvesting unit isconnected with a cutting system which is connected with a negative-pressure and spraying unit; the harvesting unit comprises a supporting frame which is successively provided with harvesting heads, aguide feeding unit and an inlet of the cutting system along a direction opposite to the forward motion direction of the mechanical device; the cutting system comprises a tubular supporting shell; oneend of the supporting shell is connected with the inlet of the cutting system; the other end of the supporting shell is connected with the negative-pressure and spraying unit; and the interior of thesupporting shell is successively and rotatably provided with a first briquetting wheel set, a second briquetting wheel set and a cutting tool along the flow direction of a straw flow. The mechanicaldevice capable of returning the crop straw to the field in place through straw cutting provided by the invention can realize precise cutting of the straw, thereby improving the decomposition efficiency of the straw after the straw returns to the field.

The invention discloses a mechanical cultivation method for interplanting corn with oyster mushrooms in a belt-shaped field. Corn with grains is the food crop with the largest planting area and high yield at present, and the oyster mushroom is an excellent vegetable crop which is easy to culture, high in yield and market recognition degree. According to the embodiment, by reasonably adjusting theplanting mode and preferentially selecting a planting integration technique, mechanical interplanting of the corn and oyster mushrooms is achieved, and the two crops can mutually create a field microclimate suitable for growth, crop rotation can be achieved in the field, and the method has a significant meaning on improvement of the soil fertility lever and sustainable development of the corns with grains and oyster mushrooms.

The invention relates to a grain harvesting machine and a chopping device thereof. The chopping device of the grain harvesting machine comprises a rotating shaft, a rotating drum, multiple rows of knife carriages, movable knife blades and fixed knife blades, wherein the rotating drum is arranged around the rotating shaft in a relatively fixed manner, the multiple rows of knife carriages are arranged on the external wall of the rotating drum along the circumferential direction of the rotating drum in a uniformly spaced manner, the movable knife blades are arranged in all of the multiple rows of knife carriages, and the fixed knife blades are arranged corresponding to the movable knife blades. Further, the spacing among adjacent movable knife blades is 34mm to 38mm, and the spacing among adjacent movable and fixed knife blades is 14mm to 18mm. According to the grain harvesting machine and the chopping device thereof, the movable and fixed knife blades, which are arranged according to the spacing, can enable straws of harvested crops achieve the optimal crushed effect during operation, so that the straws achieving the optimal crushed effect can be directly broadcast to farmland; and the crushed straws are plowed underground as an organic fertilizer through further plowing.

The invention belongs to a straw smashing returning and plastic film residue recycling bundling machine. The machine comprises a rack, a straw crusher, a film taking machine and a bundling machine arearranged on the rack, an output shaft on a tractor is connected to a first gearbox, a second gearbox and a third gearbox, a traction frame connected to a transverse pull rod of the tractor is arranged at the front end of the straw crusher, the output shaft on the tractor is connected to the first gearbox arranged on the straw crusher, and the straw crusher is arranged at the front end of the rack. The machine has the advantages that the structural design is reasonable, plastic film residues are cleaned thoroughly, straw returning to the field can be achieved, and manpower and material resources are saved.

The invention relates to a method for preparing organic fertilizer by utilizing animal excrement as well as the organic fertilizer. The method comprises the following steps: performing solid and liquid separation treatment on the animal excrement to obtain solid excrement with the water content being 45 to 50 percent by weight; adding a disinfectant into the solid excrement and stirring for 10 to15 minutes; adding straw powder and decomposed coal to enable the organic matter content of the solid excrement to be more than 45 percent by weight; adding a ripening agent and stirring for 10 to 12minutes to obtain an organic fertilizer substrate containing humic acid; mixing the organic fertilizer substrate and a soil improvement agent according to the mass ratio of 100:(15-20) and stirring for 10 to 15 minutes to obtain an improved organic fertilizer substrate; and performing pelleting and drying treatment on the improved organic fertilizer substrate to obtain an organic fertilizer finished product. The active demand on resource utilization of excrement pollutants and crop straws in breeding industry by China can be met; meanwhile, commercial organic fertilizer meeting the national standard NY525-2012 can be produced; the pain spot of environmental protection is solved; chemical fertilizer is replaced by the organic fertilizer, so that the problem of secondary pollution of soil iseffectively avoided and the time-honored planting and cultivation combined closed ring ecological system is completed completely.

The invention discloses a dry farming direct seeding planting method of rice, which comprises the steps of preparing sprinkling irrigation equipment: the lifting micro-sprinkling irrigation equipment is buried under to-be-planted ground for 30-40cm; processing a field: straws of last stubbles of crops on the to be planted ground are cut into sections, the lengths of the straw sections are 2-20cm, the straw sections are broadcast in soil, a base fertilizer is applied on the soil, and the soil is subjected to ploughing and rotary tillage; preparing rice seeds and seeding: the selected rice seeds are sown on the processed soil uniformly, and then the soil is compacted; and performing sprinkling irrigation: the lifting micro-sprinkling irrigation equipment buried under the ground is used for irrigating the soil sown with the rice seeds, and the water content of the surface of the soil is 40-60%. Therefore, the precision irrigation to the crops is realized; excess water accumulation in the rice field is avoided; and the utilization ratio of water resources is increased. In addition, the straws are turned into organic fertilizers with the passage of time; straw turnover is realized indeed; the method contributes to improving the yield and quality of grains; and environmental pollution due to straw burning is avoided.

The invention provides a special organic fertilizer for watermelons, a preparation method and an application thereof. The preparation method comprises the following steps: (1) collecting raw materials such as roots, stems, leaves and pod peels of different varieties of soya beans, mixing the raw materials, and coarsely crushing the raw materials by using a cutting machine; (2) spraying urea with the concentration of 1% for fully wetting the crushed raw materials; and (3) stacking the crushed and wetted raw materials in a cement pool or a cement yard, covering and sealing the raw materials with a plastic film, and fermenting the raw materials. The prepared organic fertilizer can effectively meet the balance requirements of watermelons on various available nutrients in the whole growth and development stage, particularly on phosphorus and potassium elements, amino acids and trace elements, under the condition of sufficient application amount, healthy and balanced growth of plants can be promoted, the fruit setting rate can be increased, and particularly, the taste quality of watermelon pulp can be remarkably improved.

A straw returning plow comprises a plow body. The plow body is provided with a universal joint, a gearbox transmission, a middle shaft, a plurality of wheel shafts and a plurality of saw wheels; one end of the universal joint is connected with an output shaft of a tractor; the gearbox transmission is disposed on a front beam of the plow body; the middle shaft is disposed on a main beam of the plow body; the wheel shafts are disposed in front of plowshares; each saw wheel is provided with tips. The straw returning plow further comprises a hydraulic pump, a plurality of hydraulic motors, a plurality of straw compression discs, a high-pressure oil pipe, high-pressure series oil pipes and a return oil pipe; the hydraulic pump is disposed behind the middle shaft; an input shaft of the hydraulic pump is connected with the middle shaft through a grooved wheel and a belt; the hydraulic motors are disposed in front of the plowshares on a plurality of elastic supports which are connected with the main beam of the plow body and which can float up and down; each straw compression disc connected with an output shaft of each hydraulic motor is provided under each elastic support; each straw compression disc is provided outside each saw wheel. The straw returning plow has the advantages that each whole straw chopped or not chopped can be fully buried during plowing, burying depth is small, and the straws are never exposed.

The invention provides a no-tillage seeding straw mulching method for wheat bred under rice stubbles. The no-tillage seeding straw mulching method for wheat bred under rice stubbles particularly includes the steps of creation of proper moisture before harvesting of rice, application of base fertilizer, wheat no-tillage sowing, harvesting through a rice combine harvester and cutting and throwing of rice straw, labor-aided uniform dispersing of straw, mechanical ditching, soil throwing and straw compacting, and irrigation and soil sedimentation. The no-tillage seeding straw mulching method for wheat bred under rice stubbles overcomes the technical bottleneck problems that under a wheat-rice double cropping planting system in the prior art, rice straw mulching is difficult, the wheat sowing quality is poor, and the yield is low, is a continuous and advanced cultivation method which can fertilize the soil, save the cost, increase the yield, improve the effect and protect the ecologic environment, and realizes the purposes of no-tillage seeding for wheat bred under rice stubbles and rice straw mulching.