Biological-carbon-based water retaining agent and preparing method thereof

Abstract

The invention discloses a biological-carbon-based water retaining agent and a preparing method thereof.The preparing method of the provided biological-carbon-based water retaining agent includes the steps that biological carbon is smashed to obtain biological carbon smashing substances, and materials rich in humic acid are smashed to obtain humic acid smashing substances; the biological carbon smashing substances, the humic acid smashing substances, attapulgite-polyacrylamide, N,N'-methylene bisacrylamide and ammonium persulfate are mixed according to the mass ratio of (20-40):10:100:(0.3-0.4):(0.01-0.02) to obtain mixed raw materials; the mixed raw materials and water are mixed according to the mass ratio of 1:(10-20) to obtain pasty mixed raw materials; the pasty mixing raw materials are heated at the temperature of 50 DEG C to 90 DEG C to obtain black colloid substances; the black colloid substances are dried and smashed at the temperature of 60 DEG C to 80 DEG C to obtain the biological-carbon-based water retaining agent.An experiment shows that the biological-carbon-based water retaining agent can be used for water retaining of soil.

Description

technical field [0001] The invention relates to a biochar-based water-retaining agent in the field of biotechnology and a preparation method thereof. Background technique [0002] Soil water-retaining agent is a kind of water-absorbing and water-retaining agent, which can improve the soil moisture properties around plant roots or seeds, and reduce soil water loss. It is known as "plant miniature reservoir". my country is a water-scarce country, and agriculture is the largest water user. The annual water shortage for agricultural irrigation has reached more than 30 billion cubic meters. At the same time, the irrigation water utilization coefficient is only 0.4-0.5, which is far behind the 0.7-0.8 in developed countries. This has led to frequent agricultural droughts. According to statistics, in the past 30 years, the average annual disaster area due to drought in my country has been 361.68 million hectares, and the average annual grain loss has been 3.94 million tons. The sho...

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Problems solved by technology

[0003] At present, soil water retaining agents are divided into raw materials, mainly including synthetic polymers of compounds (including polyacrylonitrile, polyvinyl alcohol, polyacrylamide, polyacrylate and acrylamide acrylate compound, etc.), natural polymers Biochar-based water retaining agent has the advantages of wide source of raw materials, environmental protection, low cost, etc., and has Improving soil and improving fertilizer efficiency are important directions for the development of new environmentally friendly water-retaining agents in the future. At present, the research on biochar-based water-retaining agents has just begun. The patent "a carbon-based water-absorbing agent and its preparation method" (Patent No.: CN103601832A), which provides a preparation method of biochar-based water-retaining agent, the main problem is that the amount of biochar added is very small, the synthesis process is cumbersome, and it is difficult to achieve the purpose of reducing costs; the patent "a kind of soil prepared by using the carbonization product of crop straw "Water-retaining agent" (patent number: CN102585835A), which provides a preparation method of biochar-based water-retaining agent, the main problem is that the amount of biochar added is very large, although the cost can be reduced, but its water-absorbing and water-retaining performance is difficult to achieve the quality of water-retaining agent standard requirement

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