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CN-122010627-A - Stress-resistant water-soluble fertilizer for relieving saline-alkali stress and preparation method thereof

CN122010627ACN 122010627 ACN122010627 ACN 122010627ACN-122010627-A

Abstract

The invention belongs to the technical field of functional fertilizers, and discloses a stress-resistant water-soluble fertilizer for relieving saline-alkali stress and a preparation method thereof. The rhizosphere ion balance is regulated by introducing calcium nitrate, zinc sulfate and potassium silicate, sodium ions are selectively adsorbed and the rhizosphere acid-base environment is regulated by utilizing modified bentonite, and meanwhile, the expression of a plant stress resistance signal path is induced by applying methyl salicylate, so that the synergistic regulation and control of the optimization of the rhizosphere ion environment and the improvement of the plant endogenous stress resistance capability are realized. The fertilizer can effectively reduce the proportion of sodium and potassium in crops, improve the growth stability and nutrient absorption efficiency of crops under the saline-alkali condition, has stable process, and is suitable for the water-fertilizer integrated application of crops in saline-alkali areas.

Inventors

  • LIU RUI
  • BAI YINGWEN
  • LI LU
  • JIA XIAOWEN
  • MEI LI
  • YUAN ZHE

Assignees

  • 陕西欧盖尼农业科技有限公司

Dates

Publication Date
20260512
Application Date
20260227

Claims (10)

  1. 1. The stress-resistant water-soluble fertilizer for relieving the saline-alkali stress is characterized by comprising, by weight, 40-65 parts of water-soluble macroelement nutrients, 5-15 parts of mineral adjusting factors, 3-12 parts of modified bentonite, 0.05-1.0 part of plant signal activating agents, 3-10 parts of medium trace element components and 1-5 parts of water-soluble dissolution-assisting stabilizers.
  2. 2. The stress-resistant water-soluble fertilizer according to claim 1, wherein the water-soluble macroelement nutrient consists of ammonium nitrate, monopotassium phosphate and potassium sulfate, and the mass ratio of the ammonium nitrate to the monopotassium phosphate to the potassium sulfate=1-2:0.5-1.5:1-2.
  3. 3. The stress-resistant water-soluble fertilizer according to claim 1, wherein the mineral conditioning factor comprises calcium nitrate, zinc sulfate and potassium silicate, and the mass ratio of the calcium nitrate to the zinc sulfate to the potassium silicate is 1-2:0.5-1.5:0.5-1.5.
  4. 4. The stress-resistant water-soluble fertilizer according to claim 1, wherein the preparation method of the modified bentonite specifically comprises the following steps: S101, drying bentonite under a heating condition, crushing and sieving to obtain pretreated bentonite; S102, dispersing the pretreated bentonite in deionized water, adding quaternary ammonium salt with the mass of 5% -10% of that of the bentonite, and reacting under the conditions of heating and stirring; S103, washing the modified product until the conductivity is lower than a preset range, centrifuging, suspending in a mixed solution containing tetraethoxysilane and an alkaline auxiliary agent, and continuing to react under the constant temperature condition; s104, washing, drying and crushing the bentonite subjected to coating modification to obtain a final modified bentonite finished product.
  5. 5. The stress-resistant water-soluble fertilizer of claim 1, wherein: the plant signal activator is methyl salicylate; The medium trace element component comprises chelate boron, chelate iron and magnesium sulfate; The water-soluble auxiliary dissolution stabilizer is one or more selected from sodium citrate, polyaspartic acid, sodium lignin sulfonate and potassium sodium tartrate.
  6. 6. A method for preparing a stress-resistant water-soluble fertilizer for alleviating saline-alkali stress, the stress-resistant water-soluble fertilizer being as set forth in any one of claims 1 to 5, comprising the steps of: s1, sequentially adding ammonium nitrate, monopotassium phosphate and potassium sulfate into pure water, and stirring and mixing to form a basic nutrient solution; s2, sequentially adding calcium nitrate, zinc sulfate and potassium silicate into the basic nutrient solution, and continuously stirring in the adding process to form a composite nutrient system; S3, slowly adding the modified bentonite into the mixed solution, and uniformly dispersing under the action of a stirring device to form a bentonite suspension system; S4, sequentially adding methyl salicylate, chelating boron, chelating iron and magnesium sulfate, stirring and mixing, continuously adding a water-soluble dissolution-assisting stabilizer, and uniformly mixing to obtain the stress-resistant water-soluble fertilizer.
  7. 7. The method for preparing a stress-resistant water-soluble fertilizer according to claim 6, wherein the time for adding the modified bentonite in the step S3 is controlled to be 10-30 minutes, and the stirring speed is maintained to be 500-1000 revolutions per minute.
  8. 8. The method for preparing the stress-resistant water-soluble fertilizer according to claim 6, wherein after the methyl salicylate and the medium trace elements are added in the step S4, stirring is continued for 10-20 minutes, and then the water-soluble dissolution-assisting stabilizer is added.
  9. 9. The stress-resistant water-soluble fertilizer according to claim 1, wherein the stress-resistant water-soluble fertilizer is a liquid preparation or a suspension preparation in which liquid and solid coexist.
  10. 10. The stress-resistant water-soluble fertilizer as claimed in claim 1, wherein the stress-resistant water-soluble fertilizer is suitable for water-fertilizer integrated application by drip irrigation, spray application or root irrigation.

Description

Stress-resistant water-soluble fertilizer for relieving saline-alkali stress and preparation method thereof Technical Field The invention belongs to the technical field of functional fertilizers, and particularly relates to a stress-resistant water-soluble fertilizer for relieving saline-alkali stress and a preparation method thereof. Background The saline-alkali soil in China has wide resource distribution, the area exceeds one hundred million mu, and the saline-alkali soil is mainly concentrated in northeast, northwest and North China. The soil is influenced by high salinity and high alkalinity, the rhizosphere environment of crops is bad, the moisture absorption is blocked, the ion toxicity is aggravated, the nutrient imbalance and the photosynthesis efficiency are reduced, and the sustainable development of agriculture and the utilization efficiency of cultivated land resources are seriously restricted. In order to relieve the adverse effect of saline-alkali stress on crop growth, the development of functional stress-resistant fertilizer has become an important direction for agricultural scientific research and fertilization management. The common water-soluble fertilizer in the existing market mostly uses nitrogen, phosphorus and potassium as main nutrients and is supplemented by medium trace elements, so that basic nutrition supply can be met, but the water-soluble fertilizer has limited effects in relieving saline-alkali stress, optimizing rhizosphere environment and improving salt tolerance of crops. Although some modified fertilizers attempt to be added with stress-resistant regulators or adsorption materials, the problems of single component, poor ion selectivity, insignificant synergistic effect, poor use stability and the like exist, and the compound demands of full-period nutrition regulation and stress slow release of crops in high-stress environments of saline-alkali soil are difficult to meet. Therefore, there is a need to design a novel stress-resistant water-soluble fertilizer integrating functions of ion buffer regulation, rhizosphere environment improvement, balanced nutrition supply and signal activation stress resistance. The fertilizer has good water solubility and application convenience, has multi-component coordination salt and alkali resistance, and can effectively improve the stress resistance and nutrient utilization efficiency of crops under the condition of salt and alkali stress. Disclosure of Invention In order to solve the defects in the background art, the invention aims to provide a stress-resistant water-soluble fertilizer for relieving the saline-alkali stress and a preparation method thereof, the fertilizer consists of water-soluble macroelements, mineral regulating factors, modified bentonite, plant signal activators, medium trace elements and dissolution assisting stabilizers, and can synergistically improve the rhizosphere ion environment of crops and improve the saline-alkali resistance and nutrient absorption efficiency of the crops. The aim of the invention can be achieved by the following technical scheme: The stress-resistant water-soluble fertilizer for relieving the saline-alkali stress comprises, by weight, 40-65 parts of water-soluble macroelement nutrients, 5-15 parts of mineral regulating factors, 3-12 parts of modified bentonite, 0.05-1.0 part of plant signal activators, 3-10 parts of medium and trace element components and 1-5 parts of water-soluble dissolution-assisting stabilizers. Further preferably, the water-soluble macronutrient is composed of ammonium nitrate, monopotassium phosphate and potassium sulfate, and the mass ratio of the ammonium nitrate to the monopotassium phosphate to the potassium sulfate=1-2:0.5-1.5:1-2. Further preferably, the mineral conditioning factors comprise calcium nitrate, zinc sulfate and potassium silicate, and the mass ratio of the calcium nitrate to the zinc sulfate to the potassium silicate is 1-2:0.5-1.5:0.5-1.5. Further preferably, the preparation method of the modified bentonite specifically comprises the following steps: S101, drying bentonite under a heating condition, crushing and sieving to obtain pretreated bentonite; S102, dispersing the pretreated bentonite in deionized water, adding quaternary ammonium salt with the mass of 5% -10% of that of the bentonite, and reacting under the conditions of heating and stirring; S103, washing the modified product until the conductivity is lower than a preset range, centrifuging, suspending in a mixed solution containing tetraethoxysilane and an alkaline auxiliary agent, and continuing to react under the constant temperature condition; s104, washing, drying and crushing the bentonite subjected to coating modification to obtain a final modified bentonite finished product. Further preferably, the plant signal activator is methyl salicylate; The medium trace element component comprises chelate boron, chelate iron and magnesium sulfate; The water-soluble auxiliary dissolutio