a soil conditioner

A soil conditioner and soil technology, applied in the direction of soil conditioning materials, organic fertilizers, fertilizer mixtures, etc., can solve the problems of reducing arsenic absorption, arsenic absorption performance, low production cost, poor application effect, etc., to achieve strong adsorption and immobilization Ability to reduce arsenic absorption and reduce toxicity

Inactive Publication Date: 2015-08-26
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although many conditioners have been developed successively, due to various reasons, their actual application effects are poor, especially less research on reducing the absorption of arsenic by crops, or less research on this aspect practical application
There are no reports on conditioners that reduce the toxicity of arsenic in soil, reduce the absorption of arsenic by crops, and have lower production costs.

Method used

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Effect test

Embodiment 1

[0022] The soil conditioner provided by the invention comprises: 55% to 65% of magnesium and aluminum double metal oxides, 20% to 30% of straw biomass coke and 10% to 20% of iron phosphate.

[0023] In the above embodiments, 20%-30% of the biomass coke is produced by carbonizing 40-50% of crop straw (such as rice, millet or corn straw).

[0024] In the above embodiments, 55% to 65% of magnesium and aluminum bimetallic oxides are obtained through 55% to 65% of finely ground magnesium aluminum hydrotalcite (hereinafter referred to as hydrotalcite).

Embodiment 2

[0026] The method embodiment of preparing above-mentioned soil conditioner, comprises the steps:

[0027] According to the calculation of the soil conditioner with a total weight of 100 kg, the following materials are weighed: 55 kg of ground magnesium aluminum hydrotalcite, 45 kg of ground corn stalks, 20 kg of ground iron phosphate; the weighed materials are evenly mixed, and Wet it with water until water can come out when grasping it, forming a mixed material;

[0028] Cover the mixed material with a plastic film, and stack it indoors for 3 to 4 days, then place it in a carbonization furnace, heat the mixed material slowly to 490°C in a relatively sealed state, and keep it for 2.8 hours, then stop heating, and let the carbonization process slowly The heated mixed material is taken out after gradually cooling, ground and passed through a 0.20mm sieve to obtain the soil conditioner of the present invention.

Embodiment 3

[0030] The method embodiment of preparing above-mentioned soil conditioner, comprises the steps:

[0031] According to the calculation of the soil conditioner with a total weight of 100 kg, the following materials are weighed: 60 kg of ground magnesium aluminum hydrotalcite, 50 kg of ground corn stalks, 10 kg of ground iron phosphate; the weighed materials are evenly mixed, and Wet it with water until water can come out when grasping it, forming a mixed material;

[0032] Cover the mixed material with a plastic film, and stack it indoors for 3 to 4 days, then place it in a carbonization furnace, heat the mixed material slowly to 500°C in a relatively sealed state, and keep it for 3 hours, then stop heating, and let the carbonization process slowly The heated mixed material is taken out after gradually cooling, ground and passed through a 0.25mm sieve to obtain the soil conditioner of the present invention.

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Abstract

The invention provides a soil conditioning agent, which comprises the following components in percentage by weight: 55-65 percent of a magnesium-aluminum bimetal oxide, 20-30 percent of straw biomass char and 10-20 percent of iron phosphate, wherein the 20-30 percent of straw biomass char is generated by carbonizing 40-50 percent of crop straw; and the crop straw comprises one or more of paddy rice straw, millet straw and corn straw. Due to the adoption of the conditioning agent, the aims of fixing arsenic in soil, lowering the toxicity of arsenic and reducing the absorption of arsenic in crops. Meanwhile, the conditioning agent contains a large quantity of nutritional elements such as calcium, magnesium, phosphorus and the like, so that necessary nutrients can be indirectly supplied to crops in soil.

Description

technical field [0001] The invention relates to a soil conditioner, in particular to a conditioner capable of reducing excessive arsenic toxicity in soil. Background technique [0002] Arsenic (As) is a toxic metalloid element of global concern. For a long time, various production activities such as mineral mining and smelting, coal combustion, use of arsenic-containing pesticides, veterinary drugs, and preservatives, etc., can accelerate the transfer of arsenic to soil, water and other environments to a certain extent, thereby threatening Environmental safety and human health, and the resulting arsenic pollution in soil and water have also received widespread attention. Grain crops are an important way for arsenic to enter the human food chain. Therefore, planting crops on farmland with excessive arsenic has a high risk of arsenic accumulation in agricultural products. How to reduce the absorption of arsenic by crops has also attracted widespread attention. [0003] At th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/08C09K101/00
Inventor 曾希柏李莲芳孙媛媛白玲玉苏世鸣王亚男吴翠霞
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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