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CN-121991695-A - Salinized land modifier and application thereof

CN121991695ACN 121991695 ACN121991695 ACN 121991695ACN-121991695-A

Abstract

The invention relates to the technical field of land improvers, in particular to a salinized land improver and application thereof. The salinized soil modifier provided by the invention can obviously improve the salinized resistance of plants, can improve the stress resistance of plants in seedling and growing periods after being applied to the plants planted in the salinized soil, can better grow under salt stress, can improve the indexes such as plant height, maximum leaf area, leaf number, leaf chlorophyll content and the like of the plants, can promote the yield to be improved, can effectively relieve the salt stress hazard of the plants, has an overall effect superior to that of potassium fulvate, can simultaneously avoid the problem of soil structural damage or secondary pollution caused by applying substances such as potassium fulvate, and has a good application prospect in the agricultural production of the salinized soil.

Inventors

  • Qiu Yanci
  • ZHANG HUIRU
  • Rao Chitong
  • XU JIAQI
  • ZHANG HAOQIAN

Assignees

  • 上海蓝晶微生物科技有限公司

Dates

Publication Date
20260508
Application Date
20251205
Priority Date
20250813

Claims (10)

  1. 1. A salinized soil conditioner, characterized in that the soil conditioner comprises PHBH and a base fertilizer; In the land modifier, the mass ratio of PHBH to the base fertilizer is (0.03-0.5) to (0.2-2).
  2. 2. The salinized soil conditioner of claim 1, wherein the PHBH is PHBH in the form of vesicle-like inclusion bodies.
  3. 3. The salinized soil conditioner of claim 2, wherein the PHBH is provided in the form of a PHBH-producing bacterium fermentation broth, a bacterial suspension, or a bacterial pellet.
  4. 4. A salinized soil conditioner according to any one of claims 1 to 3, wherein the base fertilizer comprises a nitrogen fertilizer, a phosphorus fertilizer and a potassium fertilizer.
  5. 5. The salinized soil conditioner according to claim 4, wherein the mass ratio of PHBH to nitrogen, phosphorus and potassium contained in the basic fertilizer is (0.03-0.5): (0.03-0.2): (0.03-0.2): (0.01-0.2), wherein nitrogen is by mass of nitrogen element, phosphorus is by mass of P 2 O 5 and potassium is by mass of K 2 O.
  6. 6. The salinized soil conditioner of claim 5, wherein the nitrogen fertilizer comprises one or more selected from the group consisting of ammonium sulfate, ammonium chloride, ammonium bicarbonate, liquid ammonia, aqueous ammonia, sodium nitrate, ammonium nitrate, calcium nitrate, urea; and/or the phosphate fertilizer comprises one or more selected from calcium superphosphate, triple superphosphate, monoammonium phosphate, diammonium phosphate, calcium magnesium phosphate fertilizer and phosphate rock powder; and/or the potash fertilizer comprises one or more selected from potassium chloride, potassium sulfate, potassium nitrate, monopotassium phosphate, dipotassium phosphate and plant ash.
  7. 7. The use of the salinized soil conditioner of any one of claims 1-6 to improve the anti-salinization performance of plants.
  8. 8. The use of a salinized soil modifier of any one of claims 1-6 to promote plant growth, development and/or yield enhancement in salinized soil.
  9. 9. A method for improving the salinization resistance of plants, which is characterized in that the method comprises the step of applying the salinization soil improver according to any one of claims 1 to 6 to plants or the soil in which the plants are planted.
  10. 10. A method for promoting the growth, development and/or yield improvement of plants in salinized soil, which is characterized in that the method comprises the step of applying the salinized soil modifier of any one of claims 1-6 to plants or the soil in which the plants are planted.

Description

Salinized land modifier and application thereof Technical Field The invention relates to the technical field of land improvers, in particular to a salinized land improver and application thereof. Background Currently, the global saline-alkali soil area is approximately 10 hundred million hectares, occupies 7% of land area, and is widely distributed in arid and semiarid regions. Development of salinized soil and improvement of grain productivity have become strategic demands for guaranteeing grain safety. The improvement method of the salinized land comprises the steps of physical improvement, namely, reducing the salt content of surface soil in general through irrigation and salt washing, deep ploughing and soil turning, covering and isolating, and the like, but has the problems of high water consumption, high cost, easy recurrence and the like, planting and turning green manure pasture, returning straws to fields, applying bacterial manure, planting salt-tolerant plants, planting tree forestation and the like, and can improve the soil fertility, improve the soil structure, improve the microclimate of farmlands, reduce the evaporation of surface water and inhibit salt returning. However, the above conventional method requires a lot of resources, is difficult to achieve a stable improvement effect for a long period of time, and has problems of high cost, low flexibility, low economic benefit, and the like. Biological improvement improves the saline soil by adding a microbial preparation, but the high-salt environment of the saline soil can influence the survival rate of microorganisms, so that the activity and the efficacy of the saline soil are unstable. Therefore, there is a need to develop efficient soil amendments to solve the problems of salinized soil improvement and plant cultivation processes. Disclosure of Invention The invention provides a salinized soil improver and application thereof. The invention discovers that poly (3-hydroxybutyric acid-co-3-hydroxycaproic acid) (PHBH) can obviously improve the salt resistance of salinized land plants when being applied to the salinized land plants in the process of developing an improver with the function of improving the salt stress resistance of the salinized land plants, promotes the growth and the yield improvement of the salinized land plants, has an effect obviously superior to that of other PHAs (for example PHB), and has better application effect after being compounded with basic fertilizers such as nitrogen fertilizer, phosphate fertilizer, potash fertilizer and the like. Specifically, the present invention provides the following technical solutions. In a first aspect, the invention provides a salinized soil conditioner, which comprises PHBH and a base fertilizer, wherein the mass ratio of PHBH to the base fertilizer is (0.03-0.5): 0.2-2. By compounding PHBH and a basic fertilizer and controlling the proportion thereof within the range, PHBH can be effectively promoted to exert the effect of improving the salinization resistance of plants, and the growth and the yield of salinization land plants are obviously improved. The PHBH has a unique molecular structure and is used as a natural energy storage substance of cells, and the PHBH can realize plant growth promotion in a saline environment by enhancing the activity of plant antioxidant enzymes (such as SOD, CAT and the like), increasing the soluble sugar content of plant root systems and activating an ABA (ABA) pathway, so that the salt tolerance of plants is improved, can provide an energy source for microorganisms, improves the survival rate of microorganisms in saline soil, maintains the health of the soil, activates a soil microorganism-plant interaction network, induces plants to generate stress-resistance related secondary metabolites and activates a stress-resistance signal pathway of the plant root systems. Realizing more efficient colonization of beneficial microorganisms in soil. PHBH employed in the present application is produced by microbial fermentation. The variety of microorganisms that produce PHBH by fermentation is large and is mainly distributed among bacteria, including Alcaligenes (Cupriavidus, ralstonia) such as Cupriavidus necator (Ralstonia eutropha), pseudomonas (Pseudomonas) such as Pseudomonas putida, pseudomonas aeruginosa, halophiles (Halomonas) such as Halomonas campaniensis, halomonas bluephagenesis, methylotrophic bacteria (Methylotrophs) such as Methylobacterium extorquens, methylomonas methanica, bacillus such as Bacillus megaterium, bacillus cereus, azotobater such as Azotobacter vinelandii, azotobacter chroococcum, photosynthetic bacteria such as Rhodospirillum such as Rhodospirillum rubrum, rhodobacter sphaeroides, and other species such as extreme environmental microorganisms such as thermophiles (Thermus thermophilus) or acidophilic bacteria, recombinant engineering bacteria such as E.coli, yeast, etc., which can produce PHBH by genetic engineering. The form