74results about How to "Increased available potassium content" patented technology

The invention discloses a carbon-based composite material for arsenic and cadmium polluted soil remediation and application of the composite material. The carbon-based composite material disclosed by the invention is prepared by the steps: taking crop straws as raw materials, and charring to prepare charcoal; mixing with an iron salt solution according to a certain solid-liquid ratio, regulating the pH value of the solution in the process so as to realize coprecipitation of the two materials; performing pyrolysis, thereby obtaining the carbon-based composite material. The carbon-based composite material prepared in the invention is applied to arsenic and cadmium compound polluted soil, and methods such as turning over, watering and the like are combined, so that the content of arsenic and cadmium in an effective state can be obviously reduced; therefore, the arsenic and cadmium in the soil can be transferred to a direction with low biotoxicity and migration, the physicochemical properties of the soil can be improved to a certain degree, and the composite material is suitable to be applied to multiple types of soil. The arsenic and cadmium ions in a water body can be effectively removed, the preparation process is simple in operating steps, and the material is wide in source, low in production cost and environment-friendly.

The invention provides a microbial agent YF, wherein the microbial agent YF comprises four strains. The four strains are Bacillus soniensis B-2, Bacillus paralicheniformis B-26, Bacillus soniensis N-16 and Bacillus pumilus N-17. The four strains are all preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation date is March 5,2020, wherein the preservation number of the Bacillus soniensis B-2 is CGMCC NO.19454, the preservation number of the Bacillus paralicheniformis B-26 is CGMCC NO.19449, the preservation number of the Bacillus sorola N-16 is CGMCC NO.19448, and the preservation number of the Bacillus pumilus N-17 is CGMCC NO.19450. The microbial inoculum provided by the invention can effectively prevent the corn stalk rot in saline soil, improve soil quality of the saline soil, and obviously promote growth of corns.

The invention relates to an acidic soil conditioner and a preparation method thereof. The method comprises the following steps: preparation of a phosphate-containing solid from glyphosate waste liquid; preparation of a soil conditioner; granulation; drying; etc. Compared with CK, the pH value, effective phosphorus content and rapidly-available potassium content in soil of a capsicum area where the acidic soil conditioner is applied are increased by 0.44 unit, 21.60% and 33.87%, respectively; as for disease resistance, the incidence of capsicum anthracnose and the incidence of capsicum phytophthora blight are reduced by 17.83% and 26.21% compared with a control group, respectively; moreover, the contents of cadmium, lead, total mercury and total arsenic in capsicum fruit are reduced by 24.21%, 23.37%, 31.58% and 17.39%, respectively. According to the invention, recycling sustainable utilization of high-pollution waste water in production of glyphosate is realized; the pH value of acidic soil is increased; and disease resistivity and harmful heavy metal ion absorbing capacity of plants are improved.

The invention discloses an improvement method of soil ecological depth in a moderate saline-alkali land. The improvement method comprises the steps that one, area surface sundries and weeds of the saline-alkali land to be improved are cleared; two, composite biological ameliorant is spread on the surface of the saline-alkali land to be improved and mixed with sand, carbide slag and potassium humate, a large quantity of soil beneficial microorganisms are bred in the short term, and soil activity is rapidly activated; three, the saline-alkali land to be improved is subjected to ploughing, leveling, irrigation, and film covering, then heat preservation and humidification for 10-15 days, acid-base balance is regulated while the soil salinity and alkali content is reduced, so that the microorganisms are over propagated and suffocated to death, and a sterile soil environment is created; four, membrane is removed and soil is air-dried, fermented organic fertilizer is applied, then salt-tolerant plants are sown to improve the biological depth of soil; five, when the growth of the sown salt-tolerant plants reaches the maximum, the salt-tolerant plants are removed and moderate saline-alkalisoil improvement is completed. The method is low in improvement cost, good in effect, and ecological and environmentally friendly.

The invention discloses a dedicated carbon-based fertilizer for cotton fields and a preparation method thereof. The dedicated carbon-based fertilizer for the cotton fields is prepared from the following raw materials in parts by weight: 15 to 18 parts of diammonium phosphate, 2 to 5 parts of urea, 2 to 5 parts of potassium sulfate, 30 to 45 parts of cotton straw biochar, 8 to 16 parts of gypsum and 8 to 16 parts of bentonite. The preparation method comprises the following steps: step 1, carbonizing the cotton stalks in an oxygen limit mode under 450 to 550 DEG C to prepare biomass charcoal andmeanwhile, evenly spraying pyroligneous on the prepared biomass charcoal; step 2, sieving the bentonite and gypsum by a 100-mesh sieve and sieving the cotton stalk biomass charcoal by a 60-mesh sieve; step 3, mixing all the raw materials together and evenly stirring to prepare a carbon-based fertilizer mixture; step 4, preparing the carbon-based fertilizer mixture into fertilizer particles; step5, utilizing a drying machine to dry the fertilizer particles to obtain the carbon-based fertilizer for cotton straws.

The invention discloses a fertilizer special for walnut, comprising, by weight, 40-50 parts of urea, 20-25 parts of ammonium dihydrogen phosphate, 25-30 parts of potassium humate, 15-20 parts of magnesium sulfate, 10-15 parts of diatomite, 1-2 parts of solid bacterial agent, 200-230 parts of corn stalk, 80-100 parts of wheat bran, 100-150 parts of farm manure, 50-80 parts of sawdust, and 50-60 parts of peanut shell. Waste is well utilized in the fertilizer, soil environment is improved using the fertilizer, less environmental damage is caused, and the fertilizer has high nutritional value and slow-release ability, the trouble of frequent application is omitted, and cost is saved; in addition, the fertilizer has certain effect of resisting disease and pest damage, less pesticide is applied, and the environment is protected. In total, yield of Chinese walnut is increased by 15-20%, and the Chinese walnut is imparted high nutritional value and has considerable market benefit.

The invention discloses lysinibacillus fusiformis and an application thereof in land reclamation and ecological reconstruction in a mining area. The strain is the lysinibacillus fusiformis, and has acollection number of CGMCC No. 9799. The strain is capable of improving the nutrient content of land reclamation soil in the mining area, and has obvious effects for improving the content of organic matters, alkali-hydrolyzale nitrogen, rapidly available potassium and available phosphorus in the land reclamation soil in the mining area. Moreover, further experiments prove that, the lysinibacillusfusiformis is capable of further improving the biomass of crops, and for culture of wheat or oilseed rapes, the biomass of crops in the land reclamation soil in the mining area can be improved; particularly important, due to use of the lysinibacillus fusiformis, the community structure of soil microorganisms can be effectively and obviously changed, the microbial diversity of the soil is improved,and the quantity of microbes is effectively increased. Therefore, remediation of the microbial community in the soil is accelerated, and the lysinibacillus fusiformis can be widely applied to remediation of the land reclamation soil in the mining area.

The invention relates to a special functional organic and inorganic controlled-release blended fertilizer for wheat in coast saline-alkali soil. The blended fertilizer contains the following components in parts by mass: 2000-3600 parts of a humic acid conditioner, 60-100 parts of common urea, 200-280 parts of sulfur and resin controlled-release urea, 500-900 parts of calcium superphosphate, 50-100 parts of a potassium sulfate fertilizer, 5-15 parts of a zinc sulfate fertilizer and 5-15 parts of a borax fertilizer. The special formula fertilizer for wheat is prepared according to the salinity content situation of the coast saline-alkali soil and the characteristics of high alkalinity, low effective phosphorus content and extremely high rapidly available potassium content; the fertilizer has the soil effects that the pH value of the soil is adjusted, the salt damage is retarded, the formation of soil aggregates is promoted, and the soil moisture is preserved; the fertilizer has the characteristics that the controlled release of nutrients is realized, the fertilizer efficiency is improved, the soil does not need to be topdressed once fertilized, and finally, the effects of improving the soil, increasing the yield and effect and saving the labor force are achieved; and the fertilizer has relatively good ecological, economic and social benefits.

The invention relates to a fish peptide organic fertilizer which comprises leftovers of aquatic products such as fishes and shrimps as a principal ingredient of a main material, various strains, potassium humate, potassium fulvic acid, a high-purity vinegar solution, a spreader, an IDS (iduronic sulfatase) reinforcer and an EDTA (ethylene diamine tetraacetic acid) chelating agent. The liquid organic fertilizer can regulate a pH (potential of hydrogen) value of soil till the soil is suitable for crop planting, improves acidity and alkalinity of the soil, effectively loosens and improves the soil, optimizes a micro-environment of the soil, improves crop resistance, can effectively improve product quality, and increases a crop yield.

The invention relates to a phosphate-solubilizing potassium-solubilizing complex microbial agent special for tea trees and a preparation method of the phosphate-solubilizing potassium-solubilizing complex microbial agent. The preparation method disclosed by the invention comprises the following steps: separating to obtain bacillus aryabhattai WP2, pseudomonas putida YP8 and potassium-solubilizing bacteria K2; inoculating the bacillus aryabhattai WP2, pseudomonas putida YP8 and potassium-solubilizing bacteria K2 into an LB fluid medium, thereby obtaining three kinds of liquid strain seeds; fully mixing the obtained three kinds of liquid strain seeds according to a volume ratio of 1:1:1, inoculating the seeds into a solid complex support, and culturing at a constant temperature of 35 DEG C for 24-48 hours until the viable count in the solid complex support reaches 4.0*10<10>cfu / g; drying the microbial agent meeting the viable count requirement at the temperature of 40 DEG C until the moisture content is less than or equal to 5%, thereby obtaining the special complex microbial agent special for tea trees. The special complex microbial agent disclosed by the invention has the phosphate-solubilizing and potassium-solubilizing effects. After the strain is prepared into a solid microbial agent, 2kg of the agent is applied to a tea garden per mu, so that the content of rapidly available phosphorus and rapidly available potassium in soil can be effectively improved, the one-hundred-bud weight of tea leaves can be improved, and the tea quality is improved.

The invention relates to the technical field of saline-alkali land improvement, in particular to a biological improvement method of a secondary saline-alkali land. The method comprises the following steps of: (1) digging a furrow on the surface of a saline-alkali land, wherein the width of the furrow is 20-40 cm and the depth of the furrow is 10-20 cm; (2) uniformly applying an organic fertilizerinto the furrow, wherein the dosage of the organic fertilizer is 450-650 kg per acre; covering soils back after applying the fertilizer, covering the soils with a film, and treating for 1-4 weeks; (3)planting a saline-alkali-resistant herbage hairy vetch on the soils of the saline-alkali land in the first year; (4) planting two-year seedlings of Elaeagnus angustifolia at the first four months ofthe second year, wherein the row spacing of plants is 2.5 m*2.5 m, and the seedlings are intercropped with Suaeda salsa; (5) intercropping a sesame with the Elaeagnus angustifolia after harvesting theSuaeda salsa in the third year. The method can improve the organic content of the secondary saline-alkali land, improve the soil structure, reduce the alkalinity and the salt content of the soils, improve the salt resistance of crops, increase the contents of hydrolyzed nitrogen, quick-acting phosphorus and quick-acting potassium in the soils, and improve the economic benefit of the secondary saline-alkali land.

The invention provides a microbial organic fertilizer containing silicic acid. The raw materials of the organic fertilizer include potassium fulvate, peat, palmitic acid, amino acids, chicken bones, silicic acid, organic nitrogen, phellandrene, alkyd resin powder, Water hyacinth plant, red jade soil, psyllium seed husk powder, pseudomonas hibiscus hibiscus, halococcus cod; the invention also provides a preparation method of the above fertilizer. In the fertilizer prepared by the present invention, the number of effective viable bacteria is 64-680 million cfu / g, the total nitrogen content is 3.3-3.5wt%, the total phosphorus content is 3.0-3.2wt%, the total potassium content is 2.2-2.3wt%, and the organic matter (on a dry basis) content is 47.2-47.5wt%, water content 21.0-21.3wt%, pH is 5.6-5.7; the fertilizer prepared by the present invention has the effect of improving saline-alkali soil, reducing sulfate content and soil pH in soil to increase the organic matter content in the soil.

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

The invention discloses an acid soil conditioner prepared from red algal waste and kitchen waste. The acid soil conditioner is prepared by mixing red algal waste powder, solid waste of food residue, waste fungus sticks, dolomite powder and shell powder according to a weight ratio of 1:0.8:0.8:0.1:0.1, wherein the red algal residue powder is supplied from red algal waste, and the solid waste of food residue is supplied from the kitchen waste. The acidic soil conditioner has the advantages that the pH (potential of hydrogen) value of the soil is obviously increased, and the acidity of the soil is improved; after applying, the content of alkaline-decomposing nitrogen, content of quick-effect potassium and content of effective phosphor in the soil are certainly increased, and the acid soil conditioner is suitable for the improvement of tobacco-planting soil.

The invention relates to a fertilizer special for improving physical and chemical properties of tobacco planting soil. The fertilizer comprises the following components in percentage by weight: 40%-50% of biochar, 5%-15% of water-retaining agent, 20%-30% of ammonium nitrate, 5%-15% of potassium dihydrogen phosphate, and 10%-20% of potassium sulfate, wherein the biochar is obtained by burning peanut shells under low temperature and oxygen deficient conditions. According to the technical scheme, based on the biochar in combination with the water-retaining agent, the carbon-nitrogen ratio of thesoil can be increased by the biochar and the content of organic matters in the soil can be increased; the water-retaining agent is capable of increasing the water content of the soil; besides, ammonium nitrate is used for controlling the dosage of nitrogen, and potassium dihydrogen phosphate and potassium sulfate are used for supplementing K and P elements so as to improve the physical and chemical properties of the tobacco planting soil. The volume weight of the soil can be reduced, and the water content, the alkali-hydrolyzable nitrogen content, the fast-acting phosphorus content and the fast-acting potassium content in the soil can be increased; the contents of the fast-acting nutrients of the soil can be kept at relatively high levels, and the quality of tobacco leaves can be improved.

The invention belongs to the technical field of production of fertilizers, and particularly relates to a special biological organic fertilizer for forage grass and a production method of the special biological organic fertilizer. The special biological organic fertilizer for the forage grass comprises the following raw materials in parts by weight: 70-100 parts of animal excrement, 50-60 parts oftung residues, 50-65 parts of sugarcane tail tips, 30-50 parts of mushroom bran, 20-40 parts of soy sauce lees, 10-40 parts of rapeseed cakes, 3-5 parts of bentonite, 10-20 parts of molasses, 3-6 parts of diammonium phosphate, 4-7 parts of magnesium sulfate heptahydrate, 5-10 parts of potassium humate, 1.0-1.5 parts of a trace element fertilizer, 5-8 parts of bone powder, 5-7 parts of cortex meliae powder, 4-6 parts of baeckea frutescen powder and 13-18 parts of a fermentation microbial inoculum. The special biological organic fertilizer for the forage grass is rich in organic matters and a large amount of beneficial biological bacteria, the survival rate of the beneficial biological bacteria in soil is high, the number of beneficial microorganisms in the soil can be effectively increased,and the activation property of the soil can be improved; and by application of the special biological organic fertilizer for the forage grass, growth of the forage grass can be promoted effectively,and the yield and quality of the forage grass are improved.

The invention discloses a soil improvement bactericide and a preparation method thereof. Wormcast, humic acid crude powder, potassium hydroxide and microbial cultures are used as main materials, and a wetting dispersant is used as an auxiliary material. The invention belongs to the technology of cycle of organic fertilizers and resources of agricultural wastes. The soil improvement bactericide prepared by adopting the preparation method is high in organic content, strong in biological activity of culture and complete in nutrition, and has the comprehensive effects of increasing roots, strengthening seedling, resisting stress, preventing diseases, resisting lodging, promoting precocity, resisting residue, preventing pollution, increasing yield and improving the soil quality. The soil improvement bactericide is simple in preparation process, low in production cost, easy to operate, agile to produce, convenient to use and easy to popularize and apply in a large area.

The invention discloses garden cultivation soil prepared from high-alkalinity river / lake mud and a preparation method and application method thereof. The method comprises the following steps that a mud cake is air-dried, and crushed for preprocessing, hydrochloric acid is used to reduce the high alkalinity of the mud cake, an EM bacteria liquid is prepared, and aerobic fermentation is carried outon a mixture of a mud matrix, rice bran , peat and the EM bacteria liquid. The method is simple in operation, low in cost and convenient for industrial production, the high-alkalinity river / lake mud is treated, the cultivation soil that can be used is produced, and the economic and environmental benefits are high. The prepared cultivation soil is high in fertilizer efficiency and low in content ofheavy metal, different items of the cultivation soil reach the national technical standards, the soil can be used to cultivate different green plants, and the survival rate, growth speed and crown widths of the plants can be improved greatly.

The invention discloses a granular water-soluble microbial fertilizer and a carrier thereof. The granular water-soluble microbial fertilizer comprises, by weight, 15 to 25 parts of potassium fulvate, 20 to 30 parts of monoammonium, 20 to 30 parts of potassium nitrate, 1 to 4 parts of Grondverbeteraar, 0.5 to 1 part of rooting powder, 5 to 15 parts of amino acids, 2 to 4 parts of a salt-alkali regulating agent and 5 to 15 parts of trace elements. 1 to 5 parts by weight of a scavenger flora and 1 to 5 parts by weight of an anti-inflammation flora are added into the granular water-soluble microbial fertilizer. The granular water-soluble microbial fertilizer is applicable to vast areas where integration of water and fertilizer is promoted and to drip irrigation, sprinkling irrigation and watering; the granular water-soluble microbial fertilizer has high contents of rapidly available nitrogen, phosphorus and potassium, and is good in effect; the granular water-soluble microbial fertilizer is capable of improving soil properties, changing microbial floras in soil, loosening soil, adjusting acid-base balance and preventing soil-borne diseases; and the granular water-soluble microbial fertilizer is convenient to use, saves time and labor and can be cooperatively used with other fertilizer for mechanical sowing, broadcasting, drip irrigation and spraying.

The invention relates to the technical field of soil improvement, in particular to a method for improving saline and alkaline land through red clover and elaeagnus angustifolia. The method comprises the following steps of 1, conducting deep tillage and loose ploughing on the saline and alkaline land, and applying decomposed organic fertilizer to serve as base fertilizer; 2, sowing red clover seeds, and inoculating nodule bacteria and arbuscular mycorrhizal fungi; 3, removing overground parts and main roots of the red clover after the red clover is harvested, conducting ditching on the surfaceof soil, and sowing elaeagnus angustifolia seeds. By means of the improvement method, the salt content and pH of the saline and alkaline land are significantly lowered, the contents of soil nutrient substances such as the organic matter, nitrogen, phosphorus and potassium are increased, the growth of the red clover and the elaeagnus angustifolia is better, the economic value of the saline and alkaline land is increased while the saline and alkaline land is improved, and the method has certain practical significance in production.

The invention provides hardening-preventing microorganism coated fertilizer. The hardening-preventing microorganism coated fertilizer comprises a hardening preventing agent, compound fertilizer and a coating agent; the weight ratio of the hardening preventing agent, the compound fertilizer and the coating agent is (20 to 50) to (2000 to 4000) to (40 to 80); the hardening preventing agent comprises hardening preventing oil, carbon powder, urea and potassium humate; the coating agent comprises feather protein powder, mountain flour and fungicide and is used for improving disease resistance of crops and the yield of crops.

The invention discloses a method for testing the effect of medicago sativa L.-corn / wheat rotation on soil. The method is characterized in that Gannon No. 3 medicago sativa L. is taken as a test material to study the effect of different rotation treatments of medicago sativa L.-corn (AC), medicago sativa L.-wheat (AW), medicago sativa L.-corn-corn (ACC) and medicago sativa L.-wheat-wheat (AWW) (bytaking a un-ploughed 5a medicago sativa L. grassland as a control, CK) on soil nutrient content, microbial population and medicago sativa L. auto-toxic substance content change. Results show that through the rotation of corn and wheat by medicago sativa L., population structures of soil microorganisms can be significantly improved, the auto-toxic substance content is reduced, and nutrients are increased in consumption and are decreased in accumulation.

The invention discloses a soil loosening fertility intensifier as well as a preparation method and application thereof. The soil loosening fertility intensifier is prepared by performing passivation culture on rice husk char and dewatered sludge according to a mass ratio of 1:(2.5-20) for 30-35 days. A using method is that 250-500g of the loosening fertility intensifier is added into every 1000g of soil. The soil loosening fertility intensifier disclosed by the invention can significantly increase the permeability of the soil, quickly improve every fertilizer effect index of the soil, improve the physicochemical properties of the soil and improve the comprehensive fertility level of the soil. The soil loosening fertility intensifier disclosed by the invention fully uses the advantages of each of the two advantages in the aspect of soil improvement, the raw materials are easily available, low in price and simple and convenient in process, and the remaining sludge can be effectively treated and a biomass-gasified byproduct rice husk char can be subjected to resource utilization at the same time.

The invention discloses a bio-organic fertilizer for inhibiting bupleurum chinensis continuous cropping obstacle. The bio-organic fertilizer can improve soil physical and chemical properties, effectively decompose nitrogen, phosphorus and potassium in soil, and contains excellent natural organic matters and nitrogen, phosphorus, potassium, silicon, iron, magnesium and other nutrient elements; the contents of alkali-hydrolyzale nitrogen and rapidly-available potassium are increased, the content of organic matters is increased, and a beneficial microorganism area environment is facilitated, pollution due to application of chemical fertilizers on cultivated soil is reduced, the growth of beneficial microorganisms is promoted so as to inhibit infection of pathogenic bacteria on bupleurum chinensis plants, the organic matter components in the soil can be effectively increased, and the formation of a soil aggregate structure is promoted; with application of the bio-organic fertilizer, the growth and development of bupleurum chinensis in the continuous cropping soil are promoted, the yield of bupleurum chinensis is significantly improved, and the quality of bupleurum chinensis can be improved.

The invention belongs to the technical field of fertilizer preparation and discloses a straw and coco coir fertilizer for cultivation of fruits and vegetables and a preparation method thereof. Raw materials of the straw and coco coir fertilizer for cultivation of fruits and vegetables are: crop straw, coco coir, potassium humate, bentonite, sodium bicarbonate, urea, ammonium nitrate, zinc nitrate,sodium selenite, ammonium molybdate, a straw-decomposing inoculant and an insecticide. Meanwhile, the invention discloses a preparation method of a straw and coco coir fertilizer for cultivation of fruits and vegetables. According to the invention, uniform porosity can be generated, and the fertilizer has effects of preventing water and soil loss and effectively relieving soil hardening. Throughnitridation of plant straw and urea, the fertilizer can provide soil with rich organic matter and effectively provides the soil with various trace elements, thus promoting growth of fruits and vegetables. With the addition of the insecticide, it can be effectively ensured that roots of fruits and vegetables will not be damaged by pests, use of various pesticides is reduced, and output of fruits and vegetables is increased.

The invention discloses a high-potassium-solubilizing paenibacillus mucilaginosus strain. The high-potassium-solubilizing paenibacillus mucilaginosus strain is paenibacillus mucilaginosus GT018-JZ18112 and is preserved in the China General Microbiological Culture Collection Center on May 7, 2019, the preservation address is No.3, No.1 yard, Beichen West Road, Chaoyang District, Beijing, and the preservation number is CGMCC No.17702. The high-potassium-solubilizing paenibacillus mucilaginosus strain has excellent potassium-dissolving capacity and can improve the soil fertility.

The invention discloses an organic fertilizer and a preparation method thereof. The preparation method comprises the following steps of (1) adding auxiliary materials into food wastes with water content of 60 to 80 wt% until the water content is reduced to 50 to 59 wt%, so as to obtain a mixture; (2) adding a fermenting bacterial agent into the mixture, and performing fermentation. The organic fertilizer has the advantages that the food wastes are fermented to obtain the organic fertilizer, so as to maximize the effective cyclic utilization of nutritional substances when the food wastes are used for producing the fertilizer, avoid the waste of resources, and produce the high economic benefits; when the organic fertilizer is applied, the excessive accumulation of nitrogen and phosphor in soil is avoided, the content of quick-effect potassium in the soil is obviously increased, the activity of the soil is improved, the seed germinating and root germinating are promoted to supply nutrients and active substances for the crop, and the intensity of photosynthesis is enhanced; the necessary multiple nutritional elements required by the crop can be continuously supplied for a long time inthe continuous mineralization process in the soil, the fertility of the soil is improved, the physical and chemical properties of the soil are improved, and the product quality is improved.

The invention discloses a method for remediating polychlorinated biphenyl-polluted soil by utilizing arbuscular mycorrhizal fungi and combining pig-derived biochar. The method comprises the followingsteps: selecting 0-20cm surface soil of the polychlorinated biphenyl-polluted soil, removing sundries in the soil, and carrying out air drying under natural conditions for later use; sowing the soil,the arbuscular mycorrhizal fungi and the pig-derived biochar in a mass ratio of 35:4:1 under ambient temperature condition, turning over, uniformly mixing, and watering to 60% of maximum water-holdingcapacity of the soil, so that degradation of polychlorinated biphenyl in the soil is realized. The arbuscular mycorrhizal fungi and the pig-derived biochar respectively obviously increase effective phosphorus content of the soil, and the pig-derived biochar also obviously increases organic carbon in the soil, rapidly available potassium content and pH value; the pig-derived biochar obviously promotes infection rate of mycorrhiza fungi, and the arbuscular mycorrhizal fungi are inoculated and the pig-derived biochar is added, so that abundance of bacteria is improved; the pig-derived biochar with the particle size larger than 0.25mm is added while the arbuscular mycorrhizal fungi are inoculated, degradation rate of polychlorinated biphenyl in the soil is obviously improved, and the degradation of plant biomass and polychlorinated biphenyl in the soil is promoted.

The invention relates to the technical field of crop cultivation, in particular to a loess plateau corn and wheat rotation planting method, and is applicable to recycling of agricultural waste resources. According to the researched and developed rotation planting method of spring corn matched with winter wheat, a plant belt is used for cultivating plants, a non-planting belt is used for stacking and fermenting straws, land utilization rate is greatly increased, the decomposition time of the straws is prolonged to twelve months from original seven months, the decomposition rate of the straws isgreatly increased, soil fertility is increased by prolonging the decomposition time of the straws, use of chemical fertilizers is decreased, and recycling of straw agriculture waste resources is greatly improved. According to the researched and developed method, the applying amount of a phosphate fertilizer can be reduced by 59%, the applying amount of a nitrogen fertilizer can be reduced by 40%,the yield of the wheat and the corn is obviously increased, the contents of soil organic matters, total nitrogen and rapidly available potassium are obviously increased, and soil fertility quality isimproved. Straws of the wheat and the corn are completely crushed and then returned to fields, the straws are effectively treated, and the possibility of environmental pollution caused by straw burning is completely avoided.