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 so

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

Experimental program
Comparison scheme
Effect test

Example Embodiment

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

[0041] A preparation method of a soil compound amendment includes the following steps:

[0042] a. Mix the tea dregs and livestock 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, and the compost is 24 to 24. After 36 hours, the compost temperature will reach 50~70℃, keep it for 4~7 days, turn over, and decompose after 15~30 days in summer; after 30~60 days in winter, it will decompose and be ready for use, get mixture 1;

[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 dry matter content is 40- 60wt% (preferably 50~55wt%), content of available nitrogen 200~500mg·kg -1 (Preferably 350~400mg·kg -1 ), the content of available phosphorus 200~500mg...

Example Embodiment

[0059] Example 1 Preparation of soil compound amendment (improver 1):

[0060] a. Weigh 2kg of fresh livestock and poultry manure and 8kg of tea dregs and mix them evenly, while adjusting the ratio of the two so that the C / N ratio of the mixture is 16, and then placing them in the fermentation tank for semi-aerobic fermentation and composting, composting 30 pieces After hours, the compost temperature will reach 50℃, keep it for 5 days and turn the pile, and it will decompose after 20 days in summer to get the mixture 1

[0061] b. Air-dry the mixture material 1 and re-mix it, and crush to obtain the mixture material 2;

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

[0063] d. Add 12kg of peat into the mixture 3, and pulverize and stir evenly again to obtain the finished product, namely the soil compound amendment (improver 1). The pH is 9.5, the water content is 10 wt%, the organic matter content in the dry matter is 20 wt%, the calci...

Example Embodiment

[0065] Example 2 Preparation of soil compound amendment (improver 2):

[0066] a. Weigh 7kg of fresh livestock and poultry manure and 17kg of tea dregs and mix them evenly, while adjusting the ratio of the two so that the C / N ratio of the mixture is 25, and then put it in the fermentation tank for semi-aerobic fermentation and composting, composting 30 pieces After hours, the compost temperature will reach 70℃. After 5 days, the compost will be turned over, and it will decompose after 15 days in summer, and the mixture will be obtained.

[0067] b. Air-dry the mixture material 1 and re-mix it, and crush to obtain the mixture material 2;

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

[0069] d. Add 4kg of peat into the mixture 3, and pulverize and stir evenly again to obtain the finished product, namely the soil compound amendment (modifier 2). Its pH is 7.5, water content is 30wt%, organic matter content in dry matter is 30wt%, calciu...

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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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