463 results about "Corn stover" patented technology

The invention discloses a multifunctional low-temperature corn straw degradation complex microbial inoculant, a preparation method and application, the complex microbial inoculant is compounded by a plurality of microorganisms with straw degradation, potassium dissolving and growth promoting functions, and the complex microbial inoculant comprises the following strains: bacillus subtilis K15, curveolate Prickia L11 and bacillus mycoides L31. The complex microbial inoculant disclosed by the invention realizes synergistic interaction and functional complementation, and through scientific compounding of strains, the straw decomposition rate is remarkably increased, and the decomposition period is obviously shortened; the adaptive capacity and colonization competitiveness of microorganisms in a low-temperature and complex soil environment in winter are enhanced. The complex microbial inoculant disclosed by the invention also has multiple functions of degrading straws, dissolving potassium, producing IAA (Indoleacetic Acid) and the like. The soil potassium which is difficult to utilize can be converted into quick-acting potassium while the straws are quickly decomposed to release nutrients.

The invention relates to the field of agricultural fertilization, in particular to a corn straw returning-to-field and fertilization operation path collaborative scheduling optimization method, which comprises the following steps: performing standardization processing on farmland multi-source original data to obtain a field piece unit standardization feature vector; performing imbalance degree analysis on the feature dimension distance component to obtain a feature contribution balance factor; performing activeness evaluation on neighborhood membership distribution of the field units to obtain a spatial membership smoothing factor; obtaining adaptive distance measurement by combining a feature contribution balance factor and a space membership smoothing factor; and performing hardening processing on the final membership matrix to obtain an agricultural machinery path collaborative scheduling instruction set, thereby solving the problems of misalignment of a zoning result, fragmentation of a management boundary and unreasonable agricultural machinery path scheduling in an abnormal straw accumulation region based on a standard FCM clustering algorithm in the prior art.

The invention discloses a Vinck Cellulomicrobe and application thereof in degradation of corn straw and improvement of soil fertility, and belongs to the field of agricultural microbial technology and solid waste resource utilization. The bacterial strain can secrete a plurality of hydrolase and oxidase including AA10 family lytic polysaccharide monooxygenase, AA2 peroxidase, GH3 and GH1 beta-glucosidase, GH16 / GH17 beta-glucosan endonuclease and AA1 multi-copper oxidase. The bacterial strain has the advantages that the bacterial strain can secrete a plurality of hydrolase and oxidase; fermentation liquor is applied to soil according to the straw mass ratio of 1: 5, and the corn straw degradation rate can be increased under the condition that the mass ratio of soil to straw is 100: 1. Meanwhile, the microbial agent can synergistically improve soil nutrients and increase the contents of rapidly available phosphorus, rapidly available potassium, alkali-hydrolyzable nitrogen, soluble organic carbon and total phosphorus in soil. According to the microbial agent, a straw lignocellulose structure is effectively cracked through a multi-enzyme system synergistic effect, and the dual effects of accelerating straw degradation and improving soil fertility are achieved.

The invention belongs to the field of feed processing, and particularly relates to a sweet potato seedling and corn straw mixed silage preparation method which comprises the following steps: S1, raw material pretreatment: respectively chopping sweet potato seedlings and corn straws; s2, mixing: the chopped sweet potato seedlings and corn straws are weighed, an additive is added, the mixture is uniformly mixed, the additive is a mixed lactic acid bacteria additive, and the addition amount is 0.1 g / kg; s3, loading into a silage container, compacting and sealing; s4, storage: the fermentation temperature range is 15-28 DEG C, preferably 25 + / -1 DEG C. According to comprehensive evaluation, the sweet potato seedlings and the corn straw are mixed and ensiled according to the proportion of 1: 1, and the comprehensive value is the highest. The proportion can effectively balance dry substances and moisture of the two raw materials, and the silage which is excellent in smell, color and texture, complete in nutrition preservation and excellent in fermentation quality can be obtained after the mixed lactic acid bacteria additive is added for ensiling for 60 days.

The invention provides a method for preparing carbon fuel from corn straw based on a functional composite binder, and belongs to the technical field of biomass solid fuel preparation. The preparation method comprises the following steps: uniformly mixing corn stalk charcoal powder with a functional composite binder to obtain a mixture, and then carrying out hot-pressing activation molding to obtain the corn stalk charcoal fuel. The functional composite binder comprises the following raw materials: phosphoric acid, polysilicic acid, polyethylene and sodium lignin sulfonate; the addition amount of the functional composite binder in the corn stalk carbon powder is 10-15 wt.%. According to the method, the controllability of the quality of the raw material carbon is greatly improved, the functional composite binder is adopted, the forming density, falling and breaking resistance and durability of the carbon fuel are improved, the process stability and repeatability are high, and a foundation is laid for large-scale production.

The invention relates to the technical field of polymer composite materials, and provides a composite water-retaining agent based on charcoal and bentonite as well as a preparation method and application of the composite water-retaining agent. The composite water-retaining agent provided by the invention is prepared from the following raw materials: acrylic acid, 2-acrylamido-2-methyl-1-propanesulfonic acid, acrylamide, sodium hydroxide, N, N '-methylene bisacrylamide, ammonium persulfate, modified bentonite and corn straw biochar. The composite water-retaining agent provided by the invention has excellent salt resistance, water holding capacity and structural stability, and the water absorbency in pure water and a 0.9% NaCl solution respectively reaches 2547.30 g / g and 164.45 g / g; when the soil conditioner is applied to saline-alkali soil, the maximum water holding capacity of the soil can be remarkably improved. The preparation process is simple, the cost is low, and the method has important practical significance on promoting ecological environment restoration of the arid mining area and realizing coordinated development of mineral resource development and environmental protection.

The application discloses a kind of multifunctional low-temperature degradation corn stalk composite microbial inoculant, preparation method and application, the composite microbial inoculant is compounded by multiple microorganisms with straw degradation, potassium solution and promoting function, comprising the following strains: bacillus subtilis K15, curvularia geniculata L11 and bacillus mycoides L31.The composite microbial inoculant constructed in the application realizes synergistic effect and functional complementation, through strain scientific compounding, straw decomposition rate is significantly improved, and decomposition period is obviously shortened;Enhance the adaptability and colonization competitiveness of microorganisms in winter low temperature and complex soil environment.The composite microbial inoculant of the application also has multiple functions such as straw degradation, potassium solution and IAA production, etc.At the same time of releasing nutrients by rapid decomposition of straw, it can convert difficult-to-use soil potassium into available potassium.

The invention discloses modified biochar as well as a preparation method and application thereof, and belongs to the technical field of aerobic composting additives, the preparation method of the modified biochar comprises the following steps: adding corn straw biochar into a Na2HPO4 solution according to a solid-to-liquid ratio of 1g: (5-10) mL by adopting an impregnation method, adjusting the pH value of a mixed system to 10.8-11.2 by adopting an alkali liquor, and stirring to obtain a mixed solution; then carrying out magnetic stirring reaction, and after the reaction is finished, carrying out centrifugal separation, washing and drying to obtain the modified biochar. The prepared modified biochar is used as an aerobic composting additive, so that greenhouse gas emission can be remarkably reduced, nitrogen retention and compost nutrient content are improved, compost maturity is promoted, plant toxicity is reduced, and a microbial community structure is directionally regulated and controlled. According to the invention, the functionality of the biochar is enhanced through chemical modification, the synergism of pollution reduction, synergism, carbon sequestration and decay promotion is realized, and an effective technical path is provided for realizing low-carbon, efficient and sustainable organic waste resource utilization.

The invention discloses a corn straw biochar coupled eurytopic triazine herbicide degrading bacterium microsphere and a preparation method thereof, and belongs to the field of bacteria and fermentation engineering. According to the method, the corn straw biochar fired at high temperature is combined with the arthrobacter ureafaciens (Paenarthrobacter ureafaciens with the preservation number of CGMCC (China General Microbiological Culture Collection Center) No.34139), so that the microbial inoculum microspheres with wide environmental adaptability are prepared. The microbial agent can efficiently degrade triazine herbicides in farmland soil, remarkably reduces the adverse effects of the triazine herbicides on sensitive crops, and is suitable for farmland pollution treatment. The technical scheme provided by the invention is simple and convenient to operate, environment-friendly and wide in application prospect.

The invention provides an agricultural waste composite modified edible fungus culture medium and a preparation method thereof. The agricultural waste composite modified edible fungus culture medium is prepared from the following components in parts by mass: 20 to 30 parts of corn straw, 15 to 25 parts of rice hull, 10 to 20 parts of sawdust, 25 to 35 parts of cottonseed hull, 5 to 10 parts of soybean meal, 0.5 to 2.0 parts of complex microbial inoculant, 3 to 8 parts of bentonite, 1 to 3 parts of chitosan, 1 to 2 parts of gypsum and 1 to 2 parts of lime. According to the invention, the complex microbial inoculants are adopted to carry out solid state fermentation modification on the basic mixture, bentonite and chitosan are compounded into the activated functional slurry, and through the synergistic effect of solid state fermentation and the functional slurry, the granular structure, water retention and air permeability of the matrix are fundamentally improved, and efficient activation and slow release of nutrients are realized; finally, the fruiting period of the shiitake mushrooms is shortened to be within 85 days, the yield is increased by 10% or above, the shiitake mushroom proportion is remarkably increased, and high-value utilization of agricultural waste is achieved.

The invention relates to the technical field of environmental functional materials, and discloses a preparation method of composite ceramsite with good nitrogen and phosphorus adsorption performance, and the preparation method specifically comprises the following steps: 1, preparing raw materials: preparing fly ash, bentonite and corn straw according to a mass ratio of 6: 3: 1 as the raw materials; 2, pretreatment: crushing the raw materials to 100 meshes, and drying at 105 DEG C for 24 hours; 3, balling: mixing fly ash, bentonite and corn straw powder according to a ratio of 6: 3: 1, adding deionized water, and stirring to form a ball, so as to prepare a raw material ball with a diameter of 5-7mm; 4, drying: drying the raw material nodules in an environment at 105 DEG C for 24 hours; 5, preheating: preheating the corn straws in a muffle furnace at 400 DEG C for 40 minutes, and pyrolyzing the corn straws to form holes; the power plant waste fly ash, the natural mineral bentonite and the agricultural waste corn straw are reasonably utilized, so that the production cost is reduced, resource utilization of the wastes is realized, and environmental protection is facilitated.

The invention discloses a corn straw biological power generation analysis method based on ecological environment protection, and relates to the technical field of biological power generation analysis, and the corn straw biological power generation analysis method comprises the following steps: continuously scanning a straw flow to obtain multi-source heterogeneous data; inputting multi-source heterogeneous data into the straw characteristic analysis model, and deconstructing key physical and chemical parameters; the key physical and chemical parameters are received, a power generation load instruction and real-time state data of boiler operation are combined, a multi-target optimization problem with the boiler thermal efficiency, the slagging risk index and the key pollutant emission concentration as optimization targets is solved through a power generation prediction control model, and a feeding instruction and a combustion instruction are generated; feeding combustion is monitored, and disturbance parameters and combustion state detection data are obtained; constructing a hybrid control model, and performing control parameter adjustment on known disturbance caused by fuel characteristic fluctuation in disturbance parameters; and the combustion state prediction deviation of the power generation prediction control model and unknown disturbance in the disturbance parameters are adjusted in real time.

The invention discloses a bottom mud ecological restoration material as well as a preparation method and application thereof. The material is composed of a degradable carrier, a treatment flora and a multifunctional filler. The carrier is porous particles die-cast by corn straws and the like; the treatment flora comprises photosynthetic bacteria, bacillus and nitrifying bacteria; the filler is prepared from non-nitrate type hydrotalcite-like compounds, calcium nitrate, nitrate type hydrotalcite-like compounds and a flocculating agent according to a specific mass ratio. The preparation method comprises the following steps: carrying out pressure casting on the carrier, adsorbing the flora, and rolling the filler to form balls. The restoration method comprises the steps that a river channel is cut off in the dry season to form a closed area, materials are put according to the area ratio of 10: 1 for preliminary restoration, and after standing is conducted for 1-5 days, the materials are put along with water flow according to the area ratio of 2: 1 for deep restoration. Through the physical, chemical and biological synergistic effect, the sediment redox environment can be effectively improved, pollutant release and degradation are promoted, operation is easy and convenient, and the risk of secondary pollution is low.

The invention discloses a compound bacterium system and application thereof in degradation of corn straw, and relates to the technical field of microorganisms. The compound bacterium system comprises candida guilliermondii, aspergillus terreus and funalia trogii. The multifunctional efficient degradation compound bacterial system provided by the invention can efficiently degrade cellulose, hemicellulose and lignin in tobacco straws at the same time, and has no negative influence on crop growth. In the application, the high-yield strain candida guilliermondii of the biological membrane is added, so that a biological membrane compound is formed by the compound bacterial system, the straw and the straw degrading enzyme, and the synergistic degradation of lignocellulose is promoted. The compound bacterial system shows a remarkable degradation effect and application potential, the corn straw degradation rate is 38.64%, and the compound bacterial system is remarkable in contrast, and has important significance in promoting agricultural sustainable development and ecological environment protection.

The invention belongs to the field of breeding, and particularly relates to a feed for breeding lumbricus and a preparation method of the feed. The corn straw, the decomposed cow dung and the pseudo-ginseng dregs are used as core raw materials, and functional additives such as the oyster shell powder and the beer yeast paste are used as auxiliary materials, so that the carbon nitrogen ratio and trace elements (such as selenium) are optimized, and the nutritional and medicinal values are ensured. Wherein after the pseudo-ginseng decoction dregs are mixed with the honey water for fermentation, other components in the feed are supplemented, so that the growth of the pheretima can be effectively promoted, and the medicinal value of the pheretima can be improved. The main raw materials are pretreated and then mixed with the auxiliary materials to build a pile for fermentation, temperature-controlled pile turning is performed, pH is adjusted, efficient degradation and sterilization are achieved, and the feed capable of promoting growth of the lumbricus and improving the medicinal value of the lumbricus is obtained.

The invention discloses streptomyces pseudogriseogriseus for promoting straw degradation and increasing soil organic matters, and belongs to the technical field of microorganisms. The streptomyces pseudogriseolus NF3 disclosed by the invention has the activity of CMC-Na enzyme, xylanase, laccase, lignin peroxidase and manganese peroxidase, and can be used for degrading cellulose, hemicellulose and lignin at the same time, and the degradation rate of the streptomyces pseudogriseolus NF3 on corn straws reaches 67.75%; the fertilizer is applied to straw returning soil, soil nutrient release is accelerated, the soil organic matter content is increased, and the crop yield is increased.

Provided are a coal gangue soil amendment, and a preparation method and use thereof. The coal gangue soil amendment includes: a crushed coal gangue material, a crushed cornstalk material, a livestock manure, a compound microbial agent, and a water-absorbing and water-retaining particle, with a weight ratio of the crushed coal gangue material, the crushed cornstalk material, the livestock manure, the compound microbial agent, and the high molecular water-absorbing and water-retaining particle being 50:20:5:3:1, where the coal gangue soil amendment is applied to soil at a weight ratio of 5 g / kg.

The invention discloses a preparation method and application of an anti-continuous cropping microbial fertilizer, and aims to solve the problems of aggravation of crop diseases and insect pests and reduction of yield and quality caused by continuous cropping planting. The preparation method comprises the following steps: activating and uniformly mixing bacillus subtilis and bacillus licheniformis, and adding an alpha-lactalbumin solution and a calcium chloride solution to prepare a bacillus aggregate; adding bentonite into the polytrehalose solution, and performing ultrasonic treatment on the mixture and the humic acid solution to prepare a modified polytrehalose-bentonite compound; uniformly mixing acremonium terricola, trichoderma harzianum and a bacillus aggregate, and adding a wall material solution to prepare a compound bacterium microcapsule preparation; and finally, mixing the microcapsules with the corn straw biochar, the chitosan oligosaccharide and the like to obtain a finished product. Through calcium ion induction and humic acid modified embedding, the strain stability and viable count are improved, soil organic matter and nitrogen phosphorus and potassium nutrients can be activated, pathogenic bacteria are inhibited, the crop rhizosphere environment is improved, the growth index and quality of red kidney beans and potatoes are effectively improved, and the method is suitable for continuous cropping resistant planting of crops.

The invention provides an application of GH48 / GH57 / GH9 family genes carried by bacillus altitudinis H1 in improvement of corn straw rumen fermentation digestibility, and belongs to the technical field of degrading bacteria. According to the invention, a cellulose degradation strain H1 is separated and screened from a goat rumen content, and the preservation number of the strain is GDMCC No: 67152. The invention further discloses a preparation method of the cellulose degradation strain H1. An in-vitro fermentation experiment shows that the soluble carbohydrate content and the lignin content of the corn straw fermented by the H1 strain are remarkably reduced, the 48-hour gas production rate is remarkably reduced, and the propionic acid content is also remarkably reduced. The result shows that the H1 strain has stronger lignin decomposition capability and preferentially degrades hemicellulose and pectin. The H1 strain provided by the invention is proved to have a good corn straw degradation effect.

The utility model relates to the technical field of corn straw bundling, and discloses a novel corn straw bundling machine which comprises a workbench, the upper surface of the workbench is fixedly connected with a protection frame, the outer wall of the protection frame is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a threaded rod, and the output end of the threaded rod is fixedly connected with a second motor. And the outer wall of the threaded rod is rotationally connected to the interior of the protection frame, the outer wall of the threaded rod is in threaded connection with a threaded block, the outer wall of the threaded block is slidably connected to the inner wall of the protection frame, the interior of the threaded block is rotationally connected with a bundling rod, and the bottom end of the bundling rod is fixedly connected with a ratchet wheel block. According to the straw bundling device, the protection frame, the first motor, the threaded rod, the threaded block, the bundling shaft, the ratchet wheel frame, the inner gear ring and the rack are matched with one another, so that one end of straw can be rapidly switched to the other end after bundling is completed, the bundling range is expanded, and the situation that bundling belts are wasted and distributed unevenly due to the fact that the bundling position is fixed is effectively prevented; and the bundling efficiency of the straws is improved.

The invention belongs to the technical field of seedling culture. The invention provides a special nutrient solution for floating seedling raising of tobacco. The nutrient solution comprises the following components: 1000g of water, 0.3-0.5 g of acorus calamus and goldhair hedyotis herb aqueous extract fermented product, 0.1-0.3 part of corn straw steam explosion enzymolysis fermented product, 0.2-0.4 g of calcium ammonium nitrate, 0.6-0.8 g of potassium sulfate, 0.3-0.5 g of ammonium bicarbonate, 0.3-0.5 part of ammonium dihydrogen phosphate, 1-2mg of boric acid and 1-2mg of zinc sulfate. The nutrient solution special for tobacco floating seedling raising can remarkably improve the emergence rate of floating seedling raising, improve the seedling strengthening index and greatly reduce the disease index of tobacco infected with black shank; when the special nutrient solution for tobacco floating seedling raising is prepared, the used technical treatment means are mature technologies in the industry, so that the special nutrient solution has higher feasibility and high industrial application value.

The invention relates to the technical field of microbial fermentation, and discloses a high-protein pig feed prepared by a microbial fermentation technology, which is prepared by the following steps: S1, mixing soybean meal, corn straw and bran according to a mass ratio of 5: 3: 2, crushing to 60-80 meshes, adding a compound microbial agent and water, and adjusting the water content to 45-50% to prepare a fermentation base material; the method comprises the following steps: carrying out first-stage solid-state fermentation for 48-60 hours under the condition of 35-38 DEG C, introducing sterile air in the fermentation process and maintaining the pressure in a tank to be 0.05-0.1 MPa and the stirring speed to be 30-50 rpm, and by arranging a complex microbial inoculant synergistic fermentation system, when the high-protein feed is prepared from soybean meal, corn straws and other plant raw materials, the high-protein feed can be prepared from the soybean meal, the corn straws and other plant raw materials. The specific compatibility proportion of bacillus licheniformis, lactobacillus plantarum and saccharomyces cerevisiae is screened, the synchronous effect of cellulose degradation, organic acid synthesis and mycoprotein enrichment is achieved, and efficient passivation of anti-nutritional factors of different raw materials is guaranteed.

This invention relates to a method for dense planting of grain and medicinal herbs in intercropping, specifically within the field of intercropping of crops and medicinal herbs. The development of modern agriculture through corn / Astragalus intercropping requires reducing water and fertilizer inputs while maintaining high yields. However, it faces challenges such as unscientific management and a lack of technical support for increasing yield and reducing emissions. The method described herein is implemented according to the following steps: Step 1: Pre-planting tillage; Step 2: Drip irrigation tape installation and sowing; Step 3: Irrigation and fertilization in the first year; Step 4: First corn harvest: Harvest the corn at its optimal harvest time in the planting year, and then shred the corn stalks to cover the Astragalus in the furrows; Step 5: Planting corn in the second year; Step 6: Irrigation and fertilization in the second year; Step 7: Harvesting the corn on the ridges and the Astragalus in the furrows in the second year, and shredding and returning the corn stalks to the field after the second harvest; Step 8: Tilling the furrows.

The present application relates to the technical field of intelligent corn straw harvesting, and specifically discloses a straw chopping length detection method and system combining a neural network and image processing, the method comprising: acquiring original images with various morphological characteristics; constructing a YOLOv5 neural network model; outputting the boundary box of the straw target and the reference object; and generating a straw region of interest image; performing image processing on the straw region of interest image and extracting the straw edge; determining the pixel area occupied by the straw based on the straw edge; calculating the pixel length of the straw based on the least-enclosing-rectangle fitting; converting the pixel length of the straw into actual physical dimensions based on the reference object calibration; correcting the actual physical dimensions based on the curvature compensation model; and accurately measuring the length of the chopped corn straw based on YOLOv5 and image processing. The straw region of interest is located by YOLOv5, the target is accurately segmented by traditional image processing, and the original image is processed by the length calculation algorithm, so that the length of the straw can be accurately predicted.

The present application relates to the technical field of soil remediation, and particularly relates to a salt and alkali resisting and reducing equipment suitable for saline and alkaline soil, which comprises a mounting frame, a feeding assembly mounted on the mounting frame, a power assembly, the power assembly connected to the mounting frame, a soil separating plate connected to the power assembly and in a hollow shape, a conveying assembly for continuously conveying salt separating layer materials connected to the soil separating plate, a guide plate arranged on each side of the soil separating plate, a mounting cylinder fixedly connected to the lower part of the soil separating plate, and two outer arc plates in symmetrical distribution rotatably connected to the mounting cylinder. The two outer arc plates are pushed by two connecting rods to expand to opposite sides with the mounting cylinder as the center, and change from a combined shape to an acute angle shape, so as to push the powdery soil on the outer sides of the two outer arc plates to the two sides. At the same time, the two outer arc plates move out of the fan-shaped grooves with corresponding fan-shaped springs, so that the expanded outer arc plates and the fan-shaped springs separate a space for laying corn stalks at the lower part of the ploughing layer.

The invention discloses a bio-organic fertilizer applied to silverweed cinquefoil root planting in saline-alkali soil and a preparation method thereof, and relates to the technical field of bio-organic fertilizers, the bio-organic fertilizer applied to silverweed cinquefoil root planting in saline-alkali soil is prepared from the following raw materials by mass: 40-60 parts of an organic matter carrier including decomposed cattle and sheep manure and corn straw according to a mass ratio of (2-3): 1; 20-30 parts of a saline-alkali soil improver and 0.5-2 parts of microbial flora; 8-15 parts of a functional additive which comprises 3-5 parts of polyaspartic acid calcium salt, 2-4 parts of gamma-polyglutamic acid, 1-2 parts of zinc sulfate and 1-2 parts of borax; 1-3 parts of a slow-release oxygen supply material; the preparation method of the bio-organic fertilizer comprises the following steps: S1, pretreating raw materials; s2, primary fermentation; s3, secondary fermentation; s4, aging and decomposing; s5, carrying out post-treatment; the survival rate of the silverweed cinquefoil root in the saline-alkali soil is greater than 92% and the Na < + > reduction rate of the soil is greater than 40% through directional raw material improvement, staged oxygen supply fermentation, aging decomposition and post-treatment, and an effective solution is provided for economic crop planting in the saline-alkali soil.

The invention relates to the technical field of microorganisms, in particular to a saline-alkaline-tolerant bacillus velezensis JT6, a cellulose degrading enzyme secreted by the same and application of the saline-alkaline-tolerant bacillus velezensis JT6. The bacillus velezensis JT6 disclosed by the invention is preserved in the China General Microbiological Culture Collection Center, the address is Institute of Microbiology, Chinese Academy of Sciences, 3 #, No.1 yard, West Beichen Road, Chaoyang District, Beijing, the preservation date is December 5, 2025, and the preservation number is CGMCC No.36918. The bacillus velezensis JT6 disclosed by the invention can be used for preparing the bacillus velezensis JT6. The strain has cellulose degradation activity, the degradation rate of corn straw is 48.8%, and the degradation rate of rice straw is 24.92%. The strain provided by the invention is used for rapid decomposition of straw returning, is safe to human and livestock, has no pollution to the environment, and has good development and application prospects.

The application provides a corn straw crushing and returning device and a use method thereof, and relates to the field of agricultural equipment. The device cuts the relatively tough corn straw wound on the blade shaft through the use of the blades outside the movable plate. When the device crushes and returns the corn straw, the two rotating rods rotate relatively in the interior of the main body. The rotating rod drives the rotating plate to rotate, and the spring drives the positioning rod to move upward, so that the positioning rod drives the blades outside the movable plate to cut the corn straw wound on the relatively-positioned rotating rod. The device cuts the relatively tough corn straw, prevents the excessive winding of the corn straw from affecting the crushing effect of the blades on the corn straw, reduces the power consumption of the motor drive, prolongs the service life of the motor, makes the blades rotate quickly to cut the corn straw, and improves the returning effect of the corn straw.

The present application relates to the technical field of agricultural machinery, and more particularly to a fruit ear collecting device for corn stalk partial cutting and field returning combined harvesting. The device comprises a machine body, a middle part of the machine body is provided with a guiding conveying part for vertical conveying and displacement of the stalks; and a fruit ear collecting device is installed above the guiding conveying part to collect the fruit ears on the upper half of the stalks. The fruit ear collecting device for corn stalk partial cutting and field returning combined harvesting can complete the collection of the fruit ears during the field returning process, reasonably divide and utilize the crops, improve the operation efficiency and utilization rate, and reduce the labor intensity of the workers.

This invention relates to the field of fertilizer technology, specifically to an organic liquid fertilizer based on straw enzymatic hydrolysate and its preparation method. The method includes: pretreating corn straw with potassium hydroxide, followed by enzymatic hydrolysis with cellulase and xylanase to obtain the enzymatic supernatant; sequentially treating the supernatant with an ultrafiltration membrane with a molecular weight cutoff of 3000 Da and a nanofiltration membrane with a molecular weight cutoff of 500 Da to collect oligosaccharides with a molecular weight window of 500-3000 Da; partially stabilizing the reducing end of the oligosaccharides with sodium borohydride; pre-complexing with boric acid at pH 8.4-8.8; then sequentially adding relatively low molecular weight sodium polyglutamate, calcium chloride dihydrate aqueous solution, and ultra-high molecular weight sodium polyglutamate to construct a sequential complexation system; subsequently adding potassium nitrate and citric acid aqueous solution; and finally, after filtration at 5 μm and heat treatment at 70℃, obtaining the organic liquid fertilizer. This fertilizer has a high proportion of 500-3000 Da oligosaccharides and a low reducing sugar equivalent, inhibiting storage precipitation and browning, and improving the retention rate of extractable oligosaccharides in the soil.