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Soil composite modifier and preparation method and application thereof

A kind of improvement agent and soil technology, applied in the field of soil improvement and soil conditioning materials, can solve the problems of crop yield reduction, nutrient element leaching, heavy metal activity increase, etc., to achieve the effect of increasing yield, reducing absorption, and improving soil properties

Active Publication Date: 2014-08-27
广东农环检验检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Soil acidification will lead to a large amount of leaching of nutrients such as Ca, Mg, and P in the soil; and the activity of heavy metals in the soil will greatly increase. The poisoning of heavy metals in acidic soil is the main factor that inhibits crop growth and leads to crop yield reduction.

Method used

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  • Soil composite modifier and preparation method and application thereof
  • Soil composite modifier and preparation method and application thereof
  • Soil composite modifier and preparation method and application thereof

Examples

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preparation example Construction

[0040] (2) A preparation method of soil compound improver

[0041] A preparation method of a soil compound improver, comprising the steps of:

[0042] a. Mix tea leaves and poultry manure evenly, and adjust the ratio of the two so that the C / N ratio of the mixture is between 16 and 25, and then put it in the fermentation tank for semi-aerobic fermentation and composting, composting 24-24 After 36 hours, the composting temperature reaches 50-70°C, and after 4-7 days, the compost is turned over, and the compost is decomposed after 15-30 days in summer; it is decomposed after 30-60 days in winter, and the mixed material 1 is obtained;

[0043] The characteristics of the mixed material 1 are: the C / N ratio is between 16~25, preferably between 18~21, the water content is 30~65wt% (preferably 45~55wt%), and the organic matter content in the dry matter is 40~ 60wt% (preferably 50-55wt%), available nitrogen content 200-500mg·kg -1 (preferably 350-400 mg·kg -1 ), available phosphorus ...

Embodiment 1

[0059] The preparation of embodiment 1 soil compound improver (improvement agent 1):

[0060] a. Weigh 2kg of fresh livestock and poultry manure and 8kg of tea dregs, mix and stir evenly, and adjust the ratio of the two to make the mixture C / N ratio 16, and then place it in the fermentation tank for semi-aerobic fermentation and composting, composting 30 pieces Hours later, the composting temperature reached 50°C, turned over after 5 days, and became decomposed after 20 days in summer to obtain the mixed material 1;

[0061] b. Air-dry the mixed material 1 and mix again, and pulverize the mixed material 2;

[0062] c. Add 30kg of alkaline waste into the mixed material 2, and mix well to obtain the mixed material 3;

[0063] d. Add 12 kg of peat to the mixed material 3, pulverize and stir again to obtain a finished product, that is, a composite soil improver (improver 1). Its pH is 9.5, water content is 10wt%, organic matter content in dry matter is 20wt%, calcium content is ...

Embodiment 2

[0065] The preparation of embodiment 2 soil compound amendments (improvement agent 2):

[0066] a. Weigh 7kg of fresh livestock and poultry manure and 17kg of tea dregs, mix and stir evenly, and adjust the ratio of the two to make the mixture C / N ratio 25, and then place it in the fermentation tank for semi-aerobic fermentation and composting, composting 30 pieces Hours later, the composting temperature reached 70°C, turned over after 5 days, and decomposed after 15 days in summer to obtain the mixed material 1;

[0067] b. Air-dry the mixed material 1 and mix again, and pulverize the mixed material 2;

[0068] c. Add 10kg of alkaline waste into the mixed material 2, and mix well to obtain the mixed material 3;

[0069] d. Add 4 kg of peat to the mixed material 3, crush and stir again to obtain the finished product, namely the soil compound improver (improver 2). Its pH is 7.5, water content is 30wt%, organic matter content in dry matter is 30wt%, calcium content is 1.5wt%, ...

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Abstract

The invention discloses a soil composite modifier and a preparation method and application thereof. The soil composite modifier is prepared from following raw materials in parts by mass: 10-30 parts of alkaline waste materials, 8-17 parts of tea dregs, 4-12 parts of peat, and 2-7 parts of excrements of livestocks. The preparation method comprises the steps of uniformly mixing the tea dregs and the excrements of livestocks, composting and fermenting, composting completely, mixing uniformly again and cutting up, sequentially mixing with the alkaline waste materials and peat uniformly. The soil composite modifier has stable properties, not only can improve the pH value and physical and chemical properties of southern acid soil, but also can lower the effectiveness of heavy metals in the soil, improve the activity of enzyme in the soil, lower the pollution of heavy metal polluted soil to underground water, and reduce the heavy metals absorbed by crops; and the modifier takes industrial and agricultural wastes as the raw material, turns waste into wealth, is low in cost and easy to prepare, and is a an ideal soil composite modifier which is used for treating acid heavy metal polluted soil and lowering heavy metals of vegetables.

Description

technical field [0001] The invention belongs to the technical field of soil improvement and soil conditioning materials, and in particular relates to a composite soil improver and its preparation method and application. Background technique [0002] Soil acidification is one of the main problems restricting the sustainable development of agriculture in my country, especially in the red soil area in southern China, the problem of soil acidification is very serious. The area of ​​various types of acidified soil in my country is about 200 million hm 2 , while the area of ​​such soil in Guangdong Province accounts for about 60%. In recent years, with the development of industry, acid rain deposition has been increasing, and the abuse of chemical fertilizers, especially the extensive use of ammonium nitrogen fertilizers, and the continuous harvesting of crops to remove alkaline substances in the soil have further aggravated soil acidification. Soil acidification will lead to a ...

Claims

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Application Information

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IPC IPC(8): C09K17/40C09K101/00C09K109/00
Inventor 魏岚邹献中李衍亮刘忠珍黄玉芬杨少海孙丽丽陈勇
Owner 广东农环检验检测有限公司
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