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Soil water-retaining agent prepared by using carbonized product of crop straws

A technology of crop straw and soil water-retaining agent, which is applied in the fields of soil conditioning materials, application, agriculture, etc.

Inactive Publication Date: 2012-07-18
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]In northern my country, most of the farmlands are arid and semi-arid areas, with severe water shortage and low productivity; the following problems exist in farmland irrigation: the concept of water-saving irrigation is not popularized; Large, occupying 70% of the total water; irrigation costs are high, and the utilization coefficient is low, only 0.3-0.4, which is far behind the 0.7-0.9 in developed countries. Therefore, it is urgent to improve the efficiency of irrigation water use and develop soil moisture conservation and water conservation. measure
[0004] Polyacrylamide (PAM) is a surface modification substance. After soil application, it can increase soil aggregation, stabilize soil structure, prevent soil loss and inhibit soil water evaporation and water retention Fertilizer and other functions, especially the strong water retention capacity, but the high cost of PAM limits its widespread use in agriculture

Method used

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  • Soil water-retaining agent prepared by using carbonized product of crop straws

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Soil water retaining agent made from the carbonization product of crop straw, take 100g of bio-black carbon (Shangqiu Sanli New Energy Co., Ltd.) obtained by carbonization of crop straw passed through a 60-mesh sieve, add 65mL of water, mix well, add 10g of PAM (purchased From Sinopharm Chemical Reagent Co., Ltd., model MW10 million), mix evenly, bake until the moisture content is 10%-30%, then take it out, cut into pieces of about 0.3-0.5cm in length and width; then dry to constant weight, That is, a water-retaining agent is obtained. The crop straw is raw material of wheat, corn, rice husk, sorghum or soybean straw.

Embodiment 2

[0013] Soil water-retaining agent made from the carbonization product of crop straw, take 100g of bio-black charcoal obtained by carbonization of crop straw passed through a 60-mesh sieve, add 70mL of water, mix well, add 15g of PAM, mix well, and bake until the moisture content is 10% -30% can be taken out, cut into pieces about 0.3-0.5cm long and 0.5cm wide; then dried to constant weight to obtain water retaining agent. The crop straw is raw material of wheat, corn, rice husk, sorghum or soybean straw.

Embodiment 3

[0015] The difference from Example 1 is that 100g of bio-black carbon passed through a 60-mesh sieve is taken, 75mL of water is added, and the quality of PAM is 20g.

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Abstract

The invention discloses a soil water-retaining agent prepared by using a carbonized product of crop straws. The soil water-retaining agent is characterized by comprising the carbonized product of crop straws and PAM (polyacrylamide); and the weight ratio of PAM to biochar is 1: 10-2: 10. The crop straws are rice husk or straws of wheat, corn, sorghum or soybean. A preparation method comprises the following steps of: grinding a biochar product obtained by carbonization of crop straws, screening by a 60-mesh sieve, adding water and mixing uniformly, adding PAM and mixing uniformly, drying till the moisture content is 10%-30%, taking out and cutting into small blocks with length about 0.3-0.5 cm and width about 0.3-0.5cm; and then drying till the weight is constant, and obtaining the water-retaining agent. The water-retaining agent can be used for slowing down spontaneous evaporation of soil moisture and improving content of soil moisture, thereby being applicable to keeping and increasing moisture of farmland soil.

Description

technical field [0001] The invention relates to a bio-black carbon water-retaining agent made of agricultural waste biomass carbonization products and polyacrylamide (PAM) and a preparation method thereof. The problem of agricultural production reduction caused belongs to the technical field of agricultural water conservation. technical background [0002] In northern my country, most of the farmland is in arid and semi-arid areas, with severe water shortage and low productivity; the following problems exist in farmland irrigation: the concept of water-saving irrigation is not popularized; the water consumption for irrigation is large, taking up 70% of the total water; The coefficient is low, only 0.3-0.4, which is far from 0.7-0.9 in developed countries. Therefore, it is urgent to improve the efficiency of irrigation water use and develop soil moisture conservation and water-saving measures. [0003] my country is a large agricultural production country, and straw is the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K101/00
Inventor 陈静潘根兴李恋卿郑金伟郑聚锋张旭辉
Owner NANJING AGRICULTURAL UNIVERSITY
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