32results about How to "Increase nitrogen" patented technology

The invention relates to a planting method for overcoming the continuous cropping problems of flue-cured tobacco. The quality of the flue-cured tobacco is improved by alternately intercropping the flue-cured tobacco and peanuts or sweet potatoes so as to improve the ratio of the medium and high rank tobacco, and both the output value per unit of land and the income of the tobacco grower are increased; and meanwhile, the flue-cured tobacco planting is integrated with the generalized agriculture production, therefore, the continuous cropping problems (such as growth inhibition, disease and insect pest epidemiology and product quality reduction, etc.) of the flue-cured tobacco are remarkably lightened, the flue-cured tobacco can be basically planted for a long term and in successive years, the problem of serious tobacco field resources in the southwest region is solved, and the sustainable production of the flue-cured tobacco is guaranteed.

The invention discloses anti-continuous cropping and continuous cropping fertilizer and a production method, bacterial fertilizer is composed of the bacterial liquid of azotobacter chroococcus, bacillus cereus and silicate bacteria and carrier, trace fertilizer is composed of borax, ammonium molybdate, zinc sulfate, SiO2, CaO, MgO and carrier, and then the bacterial fertilizer and the trace fertilizer are mixed to produce the fertilizer. The invention as the bio-enzyme preparation has no side effect of toxicity and can effectively resolve the problems of the continuous cropping harm and continuous cropping barrier of crops. The invention has a specific effect on resolving the salinization and sub-salinization of soil in a greenhouse and can regulate the abilities of nutrient absorption and disease resistance of soil. The invention can effectively restrain the growth of harmful pathogens, such as soil nematodes, etc. and rapidly promote the propagation of beneficial microorganisms. The invention can promote the rootage of plants and increase the survival rate of seedlings. The invention perfectly resolves problems of the continuous cropping harm and low yields of manifold crops, such as corn, paddy, soybean, coarse cereals, vegetables, etc.

The invention discloses a mining soil remediation method. The method comprises the following steps that the contaminated soil in a mining area is excavated with excavating equipment and is subjected to preliminary filtration; a soil sterilant is added into the soil, the soil and the soil sterilant are stirred, and secondary filtration is conducted during stirring; straw manure and grass ash are applied to each mu of the contaminated soil surface, 5kg of a remediation agent is added to 100 times the mass of water to be sprayed to the soil surface; the soil is deeply ploughed, soil remediation agent to the soil surface; plants with enrichment capacity of heavy metal are planted in the soil, when the plants grow to the growth stage, a plant growth inhibitor is sprayed to the plants; when theplants grow to the maturity stage, a heavy metal pollution remediation promoter is sprayed; and harvesting is conducted during senescence of the plants to remove heavy metal contamination. The restoration method can effectively remediate the soil contaminated by keratinization, and is feasible for residential land and planting land.

The invention provides an edible mushroom cultivation material prepared by the utilization of waste mushroom residues. The material comprises, by weight, 80-100 parts of the waste mushroom residues, 3-6 parts of cotton seed hulls, 2-6 parts of coarse wood bits, 4-10 parts of corncobs, 2-6 parts of corn flour, 3-16 parts of rice bran, 2-5 parts of soybean meal, 1-2 parts of lime, 1-3 parts of plaster stones, 0.2-0.6 part of salt, 1-3 parts of sugar, 1-3 parts of urea, 0.5-1 part of magnesium sulfate and 0.2-0.6 part of calcium superphosphate. After the raw materials are piled and fermented, bagging, sterilization and inoculation are performed. Compared with the prior art, the prepared edible mushroom cultivation material can be used for planting oyster mushrooms, coprinus comatus, auricularia auricular and others, the biotransformation efficiency is high, and 1-3 turns of edible mushrooms can be harvested.

The invention discloses a grass-growing cultivating mode of a macadamia integrifolia orchard. The grass-growing cultivating mode comprises the following steps of constructing an orchard and performingplanting; performing fertilizing management; performing water management; performing leader branch cutting and performing trimming; performing extermination of diseases and insect pests; and performing grass growing in the orchard. According to the grass-growing cultivating mode disclosed by the invention, in accordance with the characteristics that in China, macadamia integrifolia is mainly planted in mountainous regions and hilly regions, and the row spacing between plants is large, orchard grass growing management is performed on the orchards; and besides, cultivation management of soil, water and fertilizers and the like is optimized, a macadamia integrifolia cultivating mode which is high in per mu yield, and can effectively exterminate diseases and insect pests, and take account ofprevention of soil erosion is provided, and the cultivating mode has important significance on accelerating the development of the macadamia integrifolia, enlarging the planting area and improving incomes of peasants.

The invention relates to a method for passivating heavy metal in the rice field and increasing nitrogen immobilization amount. The method comprises steps as follows: a rice planting area is selected,after base fertilizer is applied, rotary tillage and irrigation are performed, and water depth keeps 3-4 cm; rice seedlings are transplanted in the rice planting area, and the water depth of field surface keeps 3-4 cm; after the seedlings revive, microalgae bio-fertilizer water is sprayed, periphytons in the planting area are observed periodically, the microalgae bio-fertilizer water is added according to the growth vigour condition, and the water depth of field surface keeps 1-2 cm; and after rice harvesting is finished, lower straw is retained, and the periphytons and the straw in the rice field are turned into the ground by rotary tillage. According to the method for passivating heavy metal in the rice field and increasing the nitrogen immobilization amount, periphyton community is constructed by application of microalgae bio-fertilizer, soil pH is changed through photosynthesis and growth and metabolism activity of algae, furthermore, a large quantity of extracellular polymeric substances are secreted, and heavy metal adsorption, passivation capacity and biological nitrogen fixation ability of the periphytons are improved. The method has the characteristics of being low in cost, flexible and easy to operate and is one green eco-technological approach.

The invention relates to a microbial fertilizer granule which comprises a core layer and a coating layer, wherein the core layer comprises the following materials in parts by weight: 4-8 parts of crushed straws, 2-6 parts of crushed wood chips, 10-12 parts of clay and two strains of each of cellulose degradation bacteria, azotobacteria and phosphate solubilizing bacteria, which are uniformly mixed, wherein the quantity of each strain is more than 1*(10<5>-10<6>) in every gram of core layer mixture; and the coating layer is formed by drying 3%-6wt% of a gelatin solution coating the outer side of the core layer in the shade. The invention also relates to a preparation method of the microbial fertilizer granule and a corresponding microbial fertilizer granule carrier. The microbial fertilizer granule disclosed by the invention overcomes the defect of the traditional microbial fertilizer that microbes cannot be stably colonized in soil and is capable of profitably recycling waste biological materials which are difficult to dispose in agricultural production.

The invention discloses a contaminated soil remediation device, and relates to the technical field of soil remediation. The contaminated soil remediation device comprises a shell, and an opening is formed in the lower end of the shell. A rotating electrical machine is arranged at the upper end of the shell, and the rotating electrical machine is connected with a rotating disk in a transmission mode. A soil breaking unit, an ultraviolet light irradiation unit and a soil remediation agent adding unit are equidistantly arranged on the edge of the lower end surface of the rotating disk. The soil breaking unit comprises an electric cylinder disposed on the lower end surface of the rotating disk, and a drive plate is fixedly disposed on the end portion of an output shaft of the electric cylinder. A drive motor is disposed on the lower end surface of the drive plate, and the drive motor is connected with a rotating shaft in a transmission mode. The rotating shaft is provided with a spiral blade. The ultraviolet light irradiation unit includes an ultraviolet lamp, and the soil remediation agent adding unit includes a material storage tank and a discharge hole communicating with the material storage tank through a feed delivery pipe. The contaminated soil remediation device improves the soil structure, improves the crop quality, and has high soil remediation efficiency.

The invention provides a biological bacterial fertilizer special for peanut planting and a preparation method of the biological bacterial fertilizer. The biological bacterial fertilizer is characterized by comprising, by weight, 20-30 parts of biological carbon, 70-80 parts of cake fertilizer, 5-10 parts of humic acid, 8-15 parts of perlite, 40-50 parts of dry cow dung, 3-5 parts of shell powder,10-15 parts of purslane, 15-25 parts of whole alfalfa plants, 20-30 parts of urea, 15-25 parts of calcium superphosphate and 4-8 parts of biological agent. An organic fertilizer serves as the main fertilizer, and a small quantity of chemical fertilizer and biological fungicide are added, so that damage of the chemical fertilizer to soil is reduced. The biological fungicide is used for killing bacteria in the soil, and the activity of beneficial bacteria is improved, so that the purposes of preventing and treating diseases of peanuts are achieved, and the planting yield of the peanuts is improved.

The invention relates to a treating method for soil hardening, and belongs to the field of soil treatment. According to the invention, food waste is used as a raw material for treating soil hardening,so that full utilization of resources is realized. Firstly, the food waste is subjected to self-fermentation, the macromolecular substance in the food waste is reduced, and the content of small molecular nutrient substances is increased; and then the fermented food waste is combined with soil. In a treatment process, steam is utilized to increase the grading decomposition of the food waste, so that the absorption of nutrient substances by the soil is promoted, and the opening of soil pores is realized. Finally, fly maggots are utilized to carry out turning, so that the soil structure is improved. The fermented food waste is mixed with the soil, and the nutrition in the soil is further increased, so that the soil hardening is treated, the risks of soil erosion and surface soil hardening are avoided, and resource utilization of the food waste is realized.

The invention relates to the field of medicinal fertilizers and provides a green ecological medicinal fertilizer for soybeans and a preparation method of the green ecological medicinal fertilizer. According to a formula, the green ecological medicinal fertilizer for soybeans is prepared from the following raw materials in parts by weight: 2-10 parts of walnut leaves, 4-10 parts of apple leaves, 10-20 parts of birch leaves and 10-30 parts of soybean straws. The preparation method comprises the concrete steps of (a) cleaning the leaves in a NaCl water solution according to the weight part, and airing; (b) uniformly stirring the aired leaves and the soybean straws (ground until the diameter is up to 0.5-1cm), diluting 1 part of prepared vinegar yeast by using 100kg of cold boiled water, and then, uniformly spraying the vinegar yeast; (c) covering and sealing a compost by using a plastic film, and then, wrapping the compost by using the straws until the compost is fermented to be mature; and (d) preparing the vinegar yeast, namely, culturing 1 part of the vinegar yeast in a culture medium prepared according to the formula: 3-4ml of edible alcohol, 0.4g of glucose, 1g of yeast extracts, 1.5g of calcium carbonate, 1.5g of agar and 100g of water at the temperature of 30 DEG C for 2 days, and then, storing in a refrigerator (4 DEG C). By using the green ecological medicinal fertilizer for soybeans, the aims of turning waste into wealth and combining a fertilizer and a medicine are achieved, and nutritive elements required by growth of soybeans can be comprehensively provided.

The invention relates to a protective farming and cultivating method, which is characterized in that a bisection crop-grass intercropping subsoiling straw-returning technology is employed, namely, a small ridge of 70 cm is employed; crops and leguminous forages are intercropped, so that a seedling region and a leguminous forage region are formed; two-row bunch planting is employed in the seedling region; proper close planting can be employed in the seedling region; a pitch is 20-25 cm; two rows of the crops are planted at intervals; the crops are planted in a triangle manner. According to the protective farming and cultivating method, a bisection method is employed for translation every year; the crops and the leguminous forages are intercropped in the first year; straws are all applied into the seedling region after harvesting, the straws are mulched; the crops are planted in the previous leguminous forage region in the second year; the leguminous forages are planted in the previous seedling region in the first year; the crops are not planted in the region in which the straws are applied; after the straws are thoroughly decomposed for one year, the crops are planted, so that the influence of the current-year straw returning on the crop yield is prevented, and the complete straw returning treatment of soil can be realized within two years.

The invention discloses a composite fermented feed for cows, and a preparation method and application of the composite fermented feed, and belongs to the technical field of biological fermented feeds.The composite fermented feed for cows disclosed by the invention consists of the following components in parts by weight: 20-30 parts of rice husks, 46-68 parts of fermented peanut meal, 50-70 partsof ammoniation corn straw, 10-18 parts of fermented algae powder, 2-5 parts of chitosan oligosaccharide, 2-4 parts of oyster powder and 2-4 parts of maifan stone powder. According to the composite fermented feed for cows disclosed by the invention, the components are reasonable in collocation, so that the milk production of the cows can be increased, and the nutritional quality of produced milk can also be increased; and according to the composite fermented feed disclosed by the invention, the intestinal microecology environment of the cows is improved, so that the digestion situation of nutrient components can be improved, the capacity of organisms for absorbing calcium and phosphorus can be increased, and nitrogen metabolism can be strengthened.

The invention provides fertilizer special for peanut planting and capable of increasing yield. The fertilizer comprises, by weight, 60-80 parts of cake fertilizer, 25-35 parts of celery, 15-20 parts of charcoal, 5-8 parts of shell powder, 3-5 parts of biological bacteria, 30-40 parts of urea, 20-30 parts of calcium superphosphate and 2-3 parts of micro fertilizer. Organic fertilizer is taken as main fertilizer, and a little chemical fertilizer and biological flora are added, so that damage to soil caused by chemical fertilizer is reduced; the biological flora is utilized to improve soil fertility and soil activity, so that yield is increased, and green planting is realized.

The invention discloses anti-continuous cropping and continuous cropping fertilizer and a production method, bacterial fertilizer is composed of the bacterial liquid of azotobacter chroococcus, bacillus cereus and silicate bacteria and carrier, trace fertilizer is composed of borax, ammonium molybdate, zinc sulfate, SiO2, CaO, MgO and carrier, and then the bacterial fertilizer and the trace fertilizer are mixed to produce the fertilizer. The invention as the bio-enzyme preparation has no side effect of toxicity and can effectively resolve the problems of the continuous cropping harm and continuous cropping barrier of crops. The invention has a specific effect on resolving the salinization and sub-salinization of soil in a greenhouse and can regulate the abilities of nutrient absorption and disease resistance of soil. The invention can effectively restrain the growth of harmful pathogens, such as soil nematodes, etc. and rapidly promote the propagation of beneficial microorganisms. The invention can promote the rootage of plants and increase the survival rate of seedlings. The invention perfectly resolves problems of the continuous cropping harm and low yields of manifold crops, such as corn, paddy, soybean, coarse cereals, vegetables, etc.

The invention discloses an ecological high-value hilly tea garden construction method. The construction method comprises the following steps: (1) conducting variety selection, specifically, selecting local tea varieties, namely selecting Taoyuan big-leaf tea, western Hunan golden tea and Baihao early as the varieties of the hilly slope tea garden; (2) conducting land selection and preparation, specifically, selecting and preparing a hilly land parcel with the slope being lower than 25 degrees; (3) planting clover to prevent water and soil loss, specifically, planting clover after soil preparation of the tea garden; (4) conducting tea planting, specifically, A, conducting tea seedling selection, B, selecting planting period, C, selecting planting density, and D, selecting planting method of planting straightly, straightly and stably; (5) conducting grass planting, specifically, A, planting Pennisetum purpureum Schum and the like in Taiwan of China, and B, planting hemarthria hemarthria; (6) conducting grazing and pasture maintenance, specifically, grasses planted in the first year of Pennisetum purpureum Schum in Taiwan of China promote stumps of Pennisetum purpureum Schum, and conducting grazing after Hemarthria hemarthria is planted in the second year; and (7) raising chickens in the tea garden. Tea planting, grass planting, shepherding and chicken raising are organically combined, a healthy tea garden ecological system is established, the tea quality is improved, high-quality commercial sheep and chicken are produced, and the purposes of high quality, high efficiency, good ecological environment and sustainable development are achieved.

The invention discloses a method for cultivating seedlings of selenium-enriched Camellia oleifera, and belongs to the technical field of Camellia oleifera planting. The cultivation method comprises the following steps of: S1, treatment of seeds; S2, treatment of a seedling cultivating land: applying seedling cultivating fertilizer, wherein the seedling cultivating fertilizer is prepared from the following raw materials of: dried pig manure, raw loess, tea bran, tea seed shells, phosphate fertilizer, shale powder, yeast, urea, orange peels, bean bran, ferrous sulfate, pomace and water; S3, sowing of the seeds; S4, management during a seedling period; and S5, other daily management. The Camellia oleifera seedlings cultivated by using the method has a high survival rate, robust plants and a certain content of selenium, and after transplanting and final planting are conducted on the Camellia oleifera seedlings, fast forest establishment, high yield and good quality are achieved; in the later management of Camellia oleifera planting, the Camellia oleifera absorbs the element of selenium easily, so that cultivated Camellia oleifera seeds have a high content of selenium, and the nutrientcontent in the Camellia oleifera seeds is improved.

The invention relates to a microbial fertilizer granule which comprises a core layer and a coating layer, wherein the core layer comprises the following materials in parts by weight: 4-8 parts of crushed straws, 2-6 parts of crushed wood chips, 10-12 parts of clay and two strains of each of cellulose degradation bacteria, azotobacteria and phosphate solubilizing bacteria, which are uniformly mixed, wherein the quantity of each strain is more than 1*(10<5>-10<6>) in every gram of core layer mixture; and the coating layer is formed by drying 3%-6wt% of a gelatin solution coating the outer side of the core layer in the shade. The invention also relates to a preparation method of the microbial fertilizer granule and a corresponding microbial fertilizer granule carrier. The microbial fertilizer granule disclosed by the invention overcomes the defect of the traditional microbial fertilizer that microbes cannot be stably colonized in soil and is capable of profitably recycling waste biological materials which are difficult to dispose in agricultural production.

The invention discloses a process for efficiently converting green electricity into low-energy-consumption air separation energy storage and purifying and liquefying CO2. The required device comprises a filter, an air compressor, an air pre-cooling system, a molecular sieve adsorber, an electric heater, a main heat exchanger, rectifying towers I and II, main condensation evaporators I, II, III and IV, subcoolers I and II, a high-temperature expansion machine, a low-temperature expansion machine, a low-temperature refrigerator, a liquid nitrogen pump I, a circulating nitrogen compressor, a water cooler behind the circulating nitrogen compressor, a liquid nitrogen storage tank, a CO2 rectifying tower, a CO2 supercharger and a liquid CO2 storage tank, wherein the molecular sieve adsorber, the electric heater, the main heat exchanger, the rectifying towers I and II, the main condensation evaporators I, II, III and IV are alternately used. According to the invention, medium and high pressure nitrogen, high purity rich oxygen and liquid nitrogen are prepared by using green electricity, CO2 enriched and purified by a circulating flue gas purification system is purified and liquefied to prepare gaseous and liquid CO2 products, the medium and high pressure nitrogen and the gaseous CO2 products are subjected to oil displacement in an oil well, the green electricity is stored in a liquid form by the liquid nitrogen and the liquid CO2 products, and the green electricity is subjected to oil displacement in the oil well and / or expansion power generation after being pressurized and vaporized. And efficient conversion and utilization of green electricity are realized.

The invention discloses a biofermented feed for cattle and sheep and a preparation method thereof, and belongs to the technical field of feeds. The feed is prepared from, by weight, 30-40 parts of fermentation materials, 10-20 parts of dried distiller's grain powder, 5-15 parts of corn flour, 3-8 parts of bran, 2-6 parts of dried molasses, 1-3 parts of vitamins, 1-3 parts of trace elements, 1.5-3.5 parts of a lignin adhesive and 0.5-1 part of a mildewproofagent. Accordingly, corn stalks are pulverized into grass powder, and mixed and fermented with ramie grass and alfalfa, crude feed difficultto digest is fermented to be turned into the feed easy to digest, and the nutritional value of the feed is improved; the feed provides rich nutrient substances, and the palatability of the feed is obviously improved; meanwhile, the utilization rate of the nutrient is improved, and the requirements of animal growth are met.

The invention discloses a compound fermented feed for dairy cows, its preparation method and application, and belongs to the technical field of biological fermented feed. The compound fermented feed for dairy cows of the present invention is composed of the following components in parts by weight: 20-30 parts of rice husk, 46-68 parts of fermented peanut meal, 50-70 parts of ammoniated corn stalks, and 10-18 parts of fermented algae powder , Chitosan oligosaccharide 2-5 parts, oyster powder 2-4 parts, medical stone powder 2-4 parts. The reasonable combination of components of the compound fermented feed for dairy cows of the present invention can not only increase the milk production of dairy cows, but also improve the nutritional quality of the produced milk; Improve the digestion of nutrients, increase the body's ability to absorb calcium and phosphorus, and enhance nitrogen metabolism.

The invention discloses a ramie feed for cattle and sheep and a preparation method thereof, and belongs to the technical field of feeds. The feed is prepared from, by weight, 80-140 parts of corn straw grass meal, 40-70 parts of ramie grass, 8-20 parts of leguminous forage, 1-2 parts of bone meal, 5-10 parts of corn flour, 5-10 parts of wheat bran, 1-2 parts of molasses, 1-2 parts of grease, 0.5-1part of ammonium bicarbonate and 10-12 parts of zymophyte liquid. According to the ramie feed for the cattle and the sheep and the preparation method thereof, corn straw is smashed into grass meal, the grass meal, the ramie grass and the smashed leguminous forage are mixed and fermented, the fermented mixture is mixed with the corn flour, the wheat bran, the molasses and the grease, and the granular feed for the cattle and the sheep is prepared. The feed for the cattle and the sheep is taken as the feed for replacing green hay, and the surplus and deficiency in low and peak seasons can be regulated. After crude fibers in the corn straw are fermented, the rate of digestion for the crude fibers is increased, in addition, during fermentation, the ammonium bicarbonate is added, the rate of digestion for the crude fibers is further increased, and the content of crude protein is increased.

The invention particularly provides a heating-free granulation production method of humic acid, aiming at solving the problems of an existing granulation technology that the strength of humic acid particles is not enough, and the energy consumption of granulation is high. The heating-free granulation production method of the humic acid comprises the following steps: after uniformly mixing and stirring humic acid powder, ammonium sulfate powder and urea powder according to the ratio of (92.5 to 94) to (5 to 6.5) to 1, adding the mixture into a granulation machine; atomizing water which accountsfor 29 percent to 32 percent of the total weight of the materials, and spraying the water on the surfaces of the materials; mixing and granulating at a rotary speed of 27r / min to 43r / min to obtain the humic acid particles; after staying in a room-temperature conveying system for 20min to 50min, sieving finished-product humic acid particles with the grain diameter of 2mm to 4mm through a multi-grade sieving device. According to the heating-free granulation production method of the humic acid, an additive is cheap and easy to obtain, the production cost is low, and technological conditions aresimple; the problem that the strength of humic acid particles is not enough is effectively improved; when the humic acid is applied to soil, a soil granular structure can be improved; the humic acid can be widely popularized and applied to the technical field of agriculture.

The invention relates to a protective farming and cultivating method, which is characterized in that a bisection crop-grass intercropping subsoiling straw-returning technology is employed, namely, a small ridge of 70 cm is employed; crops and leguminous forages are intercropped, so that a seedling region and a leguminous forage region are formed; two-row bunch planting is employed in the seedling region; proper close planting can be employed in the seedling region; a pitch is 20-25 cm; two rows of the crops are planted at intervals; the crops are planted in a triangle manner. According to the protective farming and cultivating method, a bisection method is employed for translation every year; the crops and the leguminous forages are intercropped in the first year; straws are all applied into the seedling region after harvesting, the straws are mulched; the crops are planted in the previous leguminous forage region in the second year; the leguminous forages are planted in the previous seedling region in the first year; the crops are not planted in the region in which the straws are applied; after the straws are thoroughly decomposed for one year, the crops are planted, so that the influence of the current-year straw returning on the crop yield is prevented, and the complete straw returning treatment of soil can be realized within two years.

The invention discloses chemical fertilizer special for hemerocallis citrina, and belongs to the technical field of chemical fertilizer production. The chemical fertilizer special for the hemerocalliscitrina is prepared from the following raw materials in parts by weight: 50-80 parts of straw, 30-50 parts of rape seed cake, 30-50 parts of tea seed cake, 5-15 parts of soil powder, 3-10 parts of humic acid, 3-10 parts of liquid probiotics and an appropriate amount of water. The produced chemical fertilizer is green, non-pollution, rich in nutrition and durable in fertilizer efficiency, and thefertilizer is rich in a large number of beneficial substances, including multiple kinds of organic acid, and peptide and abundant nutrient elements, including nitrogen, phosphorus and potassium; not only can comprehensive nutrition be provided for crops, but also the fertilizer efficiency is durable, soil organic matters can be added and updated, microorganism propagation is promoted, the physicochemical property and the biological activity of soil are improved, and the chemical fertilizer special for the hemerocallis citrina is a main nutrient for green food production.

The invention discloses a grafting method for raising seedlings of Camellia oleifera, and belongs to the technical field of Camellia oleifera planting. The grafting method for raising the seedlings ofCamellia oleifera comprises the following steps of: (1) seed soaking and sprouting; (2) seed sowing and seedling raising; (3) grafting: A, preparing rootstocks, B, cutting scions, and C, conducting grafting; (4) transplantation: spreading base fertilizer on a transplanting land, and carrying out transplanting, wherein the base fertilizer is prepared from the following raw materials of: dried pigmanure, raw loess, tea bran, medical stone powder, phosphate fertilizer, urea, hemp roots, honeysuckle vines, Artemisia apiacea, orange peels, ferrous sulfate, apple pomace and water; and (5) management. The Camellia oleifera seedlings cultivated by using the grafting method has a high survival rate and robust plants, and the cultivation time can be shortened; in addition, after transplanting andfinal planting are conducted on the Camellia oleifera seedlings, forest establishment is fast, the yield is high, and the quality is good.

The invention relates to a cooling cycle system with a pressure control device. The cooling cycle system comprises a cold box. The cold box comprises a cold box body containing first liquid nitrogen and a closed cycle for cooling a cooling object and at least partially located inside the cold box. The cooling cycle system further comprises a pressure control container located inside the cold box and connected with the closed cycle and containing second liquid nitrogen. The pressure control container comprises a pressure sensor for characterizing the internal pressure of the pressure control container, a low-temperature regulating valve for discharging the gas second liquid nitrogen from the pressure control container and a first heater for heating the second liquid nitrogen in the pressurecontrol container. The cooling cycle system solves the pressure control problem of a supercooled liquid nitrogen cooling cycle system.

The invention relates to the technical field of silage, and provides a method for increasing the protein content of silage corn feed. The method which comprises the following steps that silage corn is planted on two sides of a planting belt, and soybeans are planted in the planting belt; 2-3 days after the soybeans and the corn are sown, herbicide is correspondingly sprayed in the period of 2-3 compound leaves of the soybeans and the period of 3-5 leaves of the corn; topdressing is correspondingly carried out in a corn seedling stage, a corn jointing-booting stage and a tasseling-flowering stage; and harvesting and ensiling are carried out from the late milk-ripening stage to the early dough-ripening stage of the corn kernels and the late plump-grain stage of the soybeans. According to the method for increasing the protein content of the silage corn feed, silage corn and soybeans are compositely planted, so that the edge row advantage of high-stalk crop corn is exerted, the utilization rate of land, water, nutrients, space and light and heat resources is increased, nitrogen fixation of soybean root nodules increases soil nitrogen, diversity of soil bacterial communities is enriched, soil quality is improved, the effect of crop rotation is achieved, a planting and breeding combined circular agriculture mode is realized, and the ecological benefit is remarkable.

As disadvantages of chemical nitrogen production and a large number of used chemical fertilizers become increasingly obvious and the effect of increasing yield becomes increasingly unobvious, the invention provides a biological nitrogen production method. The core of the method is that: according to the characteristics of different nitrogen-fixing microorganisms, the relation between the different nitrogen-fixing microorganisms and plants, different living conditions of the different nitrogen-fixing microorganisms and the plants, and the mechanism principle and related scientific theories of biological nitrogen fixation, and by various measures, systematic coordination, overall cooperation and combined action, the nitrogen-fixing microorganism in soil are cultured and increased, and the nitrogen fixing capacity of the nitrogen-fixing microorganisms is improved; and the nitrogen-fixing microorganisms are used to produce nitrogenous fertilizers so as to meet the requirement of plant growth on nitrogen. The method has the advantages of capacity of continuously reducing the using amount of the chemical fertilizers, gradually recovering and improving soil fertility, improving the stress resistance and quality of crops and saving resources, environmental-friendliness, circular replaceability and sustainable development.