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A kind of trace element slow-release fertilizer in straw organic matter cross-linked polypeptide chelation and preparation method thereof

A technology of medium and trace elements and organic matter, applied in phosphate fertilizers, fertilization devices, fertilizer mixtures, etc., can solve the problems of high cost, limited wide-scale popularization and application, secondary pollution of applied soil, difficult treatment technology, etc. The effect of inhibiting and slow release, increasing chelation and colloid, and improving crop products and quality

Active Publication Date: 2022-02-25
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 still in the initial stage of development. Due to its dense structure, a large number of crystal regions and stable hydrogen bonds, its processing technology is very difficult.
For example, for the treatment of straw resources, the main application methods are primary utilization methods such as straw returning to the field and simple treatment to make feed. Technologies such as straw solid briquette fuel, straw pyrolysis gasification and rapid pyrolysis are immature and costly , affecting popularization and application; technologies such as cellulose degradation to produce ethanol are still in the research and development stage
The main utilization method of protein waste resources is also applied to the low-value development of animal feed, lacking innovative and mature efficient utilization of new technologies and processes

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 present invention "a trace element slow-release fertilizer in straw organic matter cross-linked polypeptide chelation and its preparation method" relates to the comprehensive utilization of agricultural waste resources and the production technology of functional fertilizers. Agricultural waste rich in cellulose resources (crop straw, sargassum) and protein-rich waste such as cephalopod processing waste, fish processing waste, livestock and poultry processing waste, oil processing waste, etc. After dissolution degradation and modification, the phosphorylated organic matter complex and phosphorylated protein hydrolyzate were obtained, and then the straw organic matter cross-linked protein microspheres were obtained by cross-linking reaction, and then the medium and trace elements were fixed and loaded, and granulated to make rich Slow-release fertilizers containing organic matter, protein, nitrogen, phosphorus and potassium, and medium / trace elements, the method of the present invention greatly increases the porosity and specific surface area of ​​the fertilizer, increases the negative charge on its surface, and increases the complexation point of trace elements in its chelation position and capacity, increase the loading of medium and trace elements, and strengthen the steric hindrance and slow-release effect of slow-release fertilizers.

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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Patent Type & Authority Patents(China)
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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