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Biochar based water-retaining agent suitable for improving collapsing hill badland soil and promoting vegetation growth and preparation method of biochar based water-retaining agent

A technology of biochar and water-retaining agent, applied in the direction of soil preparation methods, chemical instruments and methods, soil conditioning materials, etc., can solve the problems of environmental risks, single function, and high cost of water-retaining agent application, and achieve a win-win situation for the economy and the environment. The effect of promoting plant growth, good economic benefits and environmental benefits

Active Publication Date: 2019-08-30
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problems of water-retaining agents are high application cost, single function, some harmful substances will be produced during the degradation process, and there are potential environmental risks.

Method used

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  • Biochar based water-retaining agent suitable for improving collapsing hill badland soil and promoting vegetation growth and preparation method of biochar based water-retaining agent
  • Biochar based water-retaining agent suitable for improving collapsing hill badland soil and promoting vegetation growth and preparation method of biochar based water-retaining agent
  • Biochar based water-retaining agent suitable for improving collapsing hill badland soil and promoting vegetation growth and preparation method of biochar based water-retaining agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A preparation method of biochar-based water-retaining agent, comprising the following steps:

[0015] Preparation of biochar: remove PVC bags and other sundries from the waste mushroom sticks after picking shiitake mushrooms, break them into pieces with a diameter of 1cm, and then air-dry them naturally to reduce the moisture content to 10wt%; place the air-dried waste bacteria sticks under oxygen-limited conditions Pyrolysis and carbonization under high temperature; set the heating rate to 10 ℃ / min, pyrolysis and carbonization temperature to 500 ℃, holding time under this condition for 2 h, then naturally cool to room temperature, grind it to pass through a 100-mesh sieve; the obtained biochar The properties are as follows: pH 10.24, total carbon content 549.70g kg -1 , total nitrogen 13.41 g kg -1 , total phosphorus 4.11g kg -1 , total potassium 16.33 g kg -1 .

[0016] Starch-acrylic acid type water retaining agent: commercially available agricultural water retai...

Embodiment 2

[0021] A kind of method that biochar-based water-retaining agent is used for ryegrass planting and soil improvement:

[0022] Implemented in potted plants: the soil was taken from the Qingliu base of Sanming Yisheng Agriculture and Forestry Co., Ltd., which is a severely eroded site. The soil pH is 5.43 and the organic matter is 5.76 g kg -1 , total nitrogen 0.43 g kg -1 , total phosphorus 0.26 g kg -1 , total potassium 8.13 g kg -1 , alkaline hydrolyzed nitrogen 24.58 mg kg -1 , available phosphorus 6.41 mg kg -1 , available potassium 81.54 mg kg -1 .

[0023] Pot test flowerpot specifications (caliber 20cm, height 15cm, bottom diameter 16cm), the test plant is ryegrass; after the soil is air-dried, pass through a 5 mm sieve for later use, each pot is filled with 1.5kg of soil, and the biochar-based water retention obtained in Example 1 is taken Mix 3 g of agent with the soil and plant ryegrass, repeat 6 pots for each treatment, and plant 20 plants in each pot. At the ...

Embodiment 3

[0035] The steps of an improved method for using a biochar-based water-retaining agent in eroded land are the same as in Example 2, the only difference being that the biochar-based water-retaining agent in the experimental group was changed from 3 g to 7.5 g. The soil physical and chemical properties and plant growth indicators were measured. The test results are as follows:

[0036] Table 4 Effects of experimental treatments on growth indexes of ryegrass

[0037]

[0038] It can be seen from Table 4 that the plant height, weight and water content of the ryegrass in the test group were higher than those of the control group, the biochar group and the water-retaining agent, and the plant height was 13.50% higher than that of the control group, which was 7.63% higher than that of the water-retaining agent group. %; the weight increased by 21.50% compared with the control group, and increased by 13.00% compared with the water-retaining agent group; the water content increased ...

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Abstract

The invention discloses a biochar based water-retaining agent suitable for improving collapsing hill badland soil and promoting vegetation growth and a preparation method of the biochar based water-retaining agent. The biochar based water-retaining agent is prepared by steps that biochar prepared from waste shiitake mushroom sticks is dried and ground, then the biochar and a starch-acrylic acid water-retaining agent are mixed in a mass ratio of 1:4 and processed, and the biochar based water-retaining agent is prepared, and water-retention capacity analysis and soil application research for theprepared biochar based water-retaining agent are performed. The biochar based water-retaining agent can improve physicochemical properties of collapsing hill badland soil, promote plant growth and realize comprehensive utilization of waste, and has the advantages of being environmentally friendly, economical and remarkable in effect.

Description

technical field [0001] The invention relates to a biochar-based water-retaining agent suitable for soil improvement and vegetation growth promotion in collapsed hillocks, and a preparation method thereof, belonging to the field of water-retaining agents. Background technique [0002] Drought, water shortage and soil degradation have always been an important factor restricting the sustainable development of agriculture and economic and social development in my country. In recent years, the application of chemical materials or preparations to improve crop yield and water use efficiency has been widely practiced, and a new technological approach to chemical water-saving agriculture for drought resistance, water conservation, and production increase has gradually been formed. Water-retaining agent is a high-molecular polymer with super-absorbent and water-retaining capacity made of strong water-absorbing resin or starch. It can quickly absorb pure water hundreds or even thousand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40A01B79/02C05G3/04C09K101/00C05G3/80
CPCC09K17/40A01B79/02C05D9/00C09K2101/00C05G3/80
Inventor 毛艳玲王晓朋邹双全童晨晓朱巧莲胡坤林梦奇
Owner FUJIAN AGRI & FORESTRY UNIV
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