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Improver for improving soil fertility and preparation method thereof

A soil fertility and improver technology, applied in organic fertilizers, fertilization devices, fertilizer mixtures, etc., can solve the problems of lack of plant nutrients, low bioavailability, and single improvement effect, so as to control soil erosion and improve biodegradation. improve the efficiency of precipitation use

Inactive Publication Date: 2019-11-12
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of low bioavailability, single improvement effect and no plant nutrient provision of prior art soil improvers, and provide a improver for improving soil fertility and a preparation method thereof, using porous chitin-polymer The hydrophilicity, water absorption swelling, biodegradability and heavy metal adsorption of hydroxyalkanoate nanofibers can store water and provide nutrients for plant growth after degradation, and also promote microbial growth through glucose and humic acid. Arbuscular mycorrhizal fungi promote the formation and maintenance of good soil structure, promote the transformation of mineral elements in the soil matrix, and increase the activity of soil microorganisms. While improving soil fertility, they can also absorb heavy metals in the soil and provide nutrients for plant growth.

Method used

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  • Improver for improving soil fertility and preparation method thereof

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Effect test

Embodiment 1

[0029] The present embodiment provides a kind of improver for improving soil fertility, including 5 parts of Glomus intrarhizogi, 18 parts of porous chitin-polyhydroxyalkanoate nanofibers, 3 parts of glucose and 3 parts of potassium humate. Among them, the porous chitin-polyhydroxyalkanoate nanofiber has a pore diameter of 31nm, a porosity of 52%, a mass ratio of chitin and polyhydroxyalkanoate of 1:2, and the equivalent of polyhydroxyalkanoate The molecular weight is 120000Da, and based on the total weight of the polyhydroxyalkanoate, CO 2 The content is 15% by weight.

[0030] The preparation method of the improver of the present embodiment comprises the following steps:

[0031] Step 1: At room temperature, in a stirred tank, chitin and polyhydroxyalkanoate are dissolved in hexafluoroacetone to obtain a mixed solution, and the weight ratio of chitin, polyhydroxyalkanoate and solvent is 1:3: 5. The stirring speed of the stirring tank is 500r / min, and the stirring time is 1...

Embodiment 2

[0035] The present embodiment provides a kind of improver that improves soil fertility, comprises 7 parts of Glomus intraradices, 10 parts of porous chitin-polyhydroxyalkanoate nanofibers, 2 parts of glucose and 4 parts of potassium humate. Among them, the porous chitin-polyhydroxyalkanoate nanofiber has a pore diameter of 40nm, a porosity of 45%, a mass ratio of chitin and polyhydroxyalkanoate of 1:1, and the equivalent of polyhydroxyalkanoate Molecular weight is 100000Da, and based on the total weight of the polyhydroxyalkanoate, CO 2 The content is 12% by weight.

[0036] The preparation method of the improver of the present embodiment comprises the following steps:

[0037] Step 1: Dissolve chitin and polyhydroxyalkanoate in dimethylacetamide-lithium chloride in a stirred tank at room temperature to obtain a mixed solution, the weight of chitin, polyhydroxyalkanoate and solvent The ratio is 1:4:6, the stirring speed of the stirred tank is 650r / min, and the stirring time ...

Embodiment 3

[0041] The present embodiment provides a kind of improver that improves soil fertility, comprises Glomus mosei 3 parts, porous chitin-polyhydroxyalkanoate nanofiber 22 parts, glucose 4 parts and sodium humate 2 parts. Among them, the porous chitin-polyhydroxyalkanoate nanofiber has a pore diameter of 25nm, a porosity of 60%, a mass ratio of chitin and polyhydroxyalkanoate of 1:3, and the equivalent of polyhydroxyalkanoate The molecular weight is 180000Da, and based on the total weight of the polyhydroxyalkanoate, CO 2The content is 18% by weight.

[0042] The preparation method of the improver of the present embodiment comprises the following steps:

[0043] Step 1: At room temperature, in a stirred tank, chitin and polyhydroxyalkanoate are dissolved in hexafluoroisopropanol to obtain a mixed solution, and the weight ratio of chitin, polyhydroxyalkanoate and solvent is 1: 5:9, the stirring speed of the stirred tank is 400r / min, and the stirring time is 20h; the mixed solutio...

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Abstract

The invention discloses an improver for improving soil fertility. The improver comprises arbuscular mycorrhizal fungi, porous chitin-polyhydroxyalkanoate nanofibers, glucose, and humic acid. The invention also provides a preparation method of the improver for improving soil fertility. The disclosed improver for improving soil fertility utilizes hydrophilicity, water absorption and swelling properties, biodegradability and heavy metal adsorption properties of the porous chitin-polyhydroxyalkanoate nanofibers to preserve moisture and provide nutrients for plant growth after degradation, glucoseand humic acid promote microbial growth, and arbuscular mycorrhizal fungi promote formation and maintenance of a good soil structure, promote conversion of mineral elements in soil matrix, and enhancesoil microbial activity. The improver can absorb heavy metals in the soil and provide nutrients for plant growth while improving soil fertility.

Description

technical field [0001] The invention relates to a soil conditioner, in particular to a conditioner for improving soil fertility and a preparation method thereof. Background technique [0002] Soil fertility is a measure of the soil's ability to provide the various nutrients needed for crop growth. It is an important indicator reflecting soil fertility, a comprehensive expression of various basic properties of soil, the most essential feature of soil that is different from soil parent material and other natural bodies, and also the material basis of soil as natural resources and agricultural production materials. Low soil fertility also has a great impact on the growth and development of crops, such as slow plant growth, poor flowering and pollination, less fruit setting and lower yield. Many existing soils have changes in soil texture, structure, water status, temperature status, biological status, organic matter content or pH due to poor natural conditions of the land, imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04
CPCC05F11/00C05G3/00
Inventor 罗言云
Owner SICHUAN UNIV
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