Straw organic matter cross-linked polypeptide chelated medium trace element slow-release fertilizer and preparation method thereof

A technology of medium and trace elements and organic matter, applied in the direction of phosphate fertilizer, fertilization equipment, fertilizer mixture, etc., can solve the problems of high cost, limited wide-scale promotion and application, secondary pollution of soil, and difficult treatment technology, etc., to achieve enhanced space position Blocking and slow-release effects, increasing chelation and colloidal properties, and improving the effects of crop products and quality

Active Publication Date: 2020-07-14
ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) The cost of existing products is relatively high: most of the slow-release fertilizers used in the market are coated slow-release fertilizers. Because they mainly use organic materials as solvents and coating materials, and the equipment consumes a lot of energy, the price of fertilizers is expensive 1. The coating material is difficult to degrade, and it is easy to cause secondary pollution when applied to the soil; (3) The trace elements in the commonly used trace element compound fertilizer exist in the form of metal ions, which are easily solidified by the soil, making the utilization rate of trace elements relatively low. Low, water-soluble metal chelates can be used as micro-fertilizers to obtain obvious yield-increasing effects, but the high cost limits its wide-scale application
But on the whole, it is st...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Add 100g of superphosphoric acid and 20g of ammonium sulfonate to a 2-liter reaction kettle and mix evenly. Weigh 100g of dried corn stalks, crush them to 100 mesh, add them to the reaction kettle, adjust the temperature to 50°C, and stir Liquefaction for 4 hours to form a viscous straw organic matter mixed system in the dispersed state of sulfonated lignin suspended particles and phosphorylated linear cellulose / hemicellulose molecules;

[0038](2) Take 100g of squid processing scraps (including squid skin and viscera) to remove 70% of the water, grind to 100 mesh, disperse and dissolve in 100g of 10% potassium hydroxide solution, and add 20g of potassium tripolyphosphate , react at 80°C for 4h to form phosphorylated protein hydrolyzate;

[0039] (3) Under ice bath conditions, add the protein hydrolyzate formed in step (2) to the reactor and mix with the straw organic matter system formed in step (1) to form a straw organic matter-protein hydrolyzate complex solutio...

Embodiment 2

[0045] (1) Add 100g of superphosphoric acid and 40g of ammonium sulfonate into a 2-liter reaction kettle and mix evenly. Weigh 80g of dried rice husk, crush it to 100 mesh, add it to the reaction kettle, adjust the temperature to 40°C, and stir Liquefaction for 4 hours to form a viscous straw organic matter mixed system in the dispersed state of sulfonated lignin suspended particles and phosphorylated linear cellulose / hemicellulose molecules;

[0046] (2) Take 60 g of rapeseed meal and dry it to remove 80% of the water, crush it to 100 mesh, disperse and dissolve it in 60 g of 10% potassium hydroxide solution, add 10 g of sodium tripolyphosphate, and react at 80 ° C for 3 h , forming polysaccharide-polypeptide-lignin cross-linked microspheres;

[0047] (3) Under ice-bath conditions, add the protein hydrolyzate formed in step (2) to the reactor and mix with the straw organic matter system formed in step (1) to form a straw organic matter-protein hydrolyzate complex solution, an...

Embodiment 3

[0053] (1) Add 100g of superphosphoric acid and 40g of ammonium sulfonate into a 2-liter reactor and mix evenly. Weigh 100g of dried rice, crush it to 100 mesh, add it to the reactor, adjust the temperature to 60°C, and liquefy under stirring conditions. 4h, forming a viscous straw organic matter mixed system of sulfonated lignin suspended particles and phosphorylated linear cellulose / hemicellulose molecular dispersion state;

[0054] (2) Get 100g of tilapia skin partly dry after removing 70% moisture, pulverize to 100 mesh, disperse and dissolve in 100g mass fraction and be 10% potassium hydroxide solution, and add 20g potassium tripolyphosphate, at 70 ℃ Under reaction for 2h, phosphorylated protein hydrolyzate was formed;

[0055] (3) Under ice bath conditions, add the protein hydrolyzate formed in step (2) to the reactor and mix with the straw organic matter system formed in step (1) to form a straw organic matter-protein hydrolyzate complex solution, and oxidize it with hy...

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Abstract

The invention discloses a straw organic matter cross-linked polypeptide chelated medium trace element slow-release fertilizer and a preparation method thereof, and relates to agricultural waste resource comprehensive utilization and functional fertilizer production technologies. The method comprises the following steps: dissolving, degrading and modifying agricultural wastes (crop straws and sargassum thunbergii) rich in cellulose resources and wastes (such as cephalopod processing leftovers, fish processing leftovers, livestock and poultry processing leftovers, oil processing leftovers and the like) rich in proteins; preparing a phosphorylated organic matter compound and a phosphorylated protein hydrolysate; carrying out cross-linking reaction to obtain straw organic matter cross-linked protein microspheres; then fixedly loading medium and trace elements; and performing pelleting to manufacture the slow-release fertilizer rich in organic matters, protein, nitrogen phosphorus potassium, medium/trace elements. According to the method disclosed by the invention, the porosity and the specific surface area of the fertilizer are greatly increased, so that negative charges on the surfaceof the fertilizer are increased, the complexing point location and the capability of chelating the medium trace elements are improved, the medium and trace element loading capacity is improved, and the steric hindrance and the slow release effect of the slow release fertilizer are enhanced.

Description

technical field [0001] The invention relates to the technical field of environment and resource utilization, in particular to a slow-release fertilizer for trace elements in straw organic matter cross-linked polypeptide chelation and a preparation method thereof Background technique [0002] Slow-release fertilizer is a new type of fertilizer that develops sustainable ecological agriculture, improves fertilizer utilization, and is environmentally friendly. At present, domestic research on slow-release fertilizers has made some progress, but there are still some problems, mainly as follows (1) There are few slow-release fertilizers for medium and trace elements: the existing slow-release fertilizers contain a single nutrient element, and most of the reports are nitrogen-containing slow-release fertilizers. There are few researches and industrialized products on medium and trace elements . There are 17 kinds of nutrients necessary for plant growth, including macronutrients an...

Claims

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Application Information

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IPC IPC(8): C05G3/40C05G3/00C05G5/12C05G3/80
CPCC05G3/00C05B1/02
Inventor 胡雪芳王士奎孙昊李旭锐裴海生
Owner ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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