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Production method of crop straw porous pyrolysis biochar adsorption slow release fertilizer
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A technology of crop straw and production method, which is applied to the field of crop straw porous pyrolysis biochar adsorption slow-release fertilizer, can solve the problems of waste of fertility, soil desertification, soil compaction, etc., and achieve the effects of avoiding rainwater erosion and long fertilizer effect time.
Inactive Publication Date: 2019-03-01
JIANGXI INST OF REO SOIL +1
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[0003] In addition, after chemical fertilizers are applied, they are easily eroded by rainwater and lost, resulting in waste of fertility, affecting the growth of crops, and increasing the cost of agricultural production
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Embodiment 1
[0026] A method for producing crop straw porous pyrolysis biochar to adsorb slow-release fertilizer, wherein the crop straw is rice straw, comprising the following steps:
[0027] (1) Straw sorting, collecting rice straw in the farmland, and preliminary cleaning to remove soil, stones and other sundries in the rice straw;
[0028] (2) Drying, spreading the sorted rice stalks in step (1) to dry to remove moisture attached to the rice stalks;
[0029] (3) crushing, adding the rice straw after drying in step (2) into the crushing device for crushing;
[0030] (4) Mix the pore-forming agent, weigh 100 parts of the rice straw crushed in step (3) and put it into the soaking equipment, and add 200 parts of the pore-forming agent solution to soak the rice straw, soak it for 60 minutes, remove it, and air-dry it at low temperature;
[0031] (5) Pyrolysis, put the rice straw obtained in step (4) into a stainless steel reaction tank, heat and crack it under continuous nitrogen protectio...
Embodiment 2
[0035] A method for producing crop straw porous pyrolysis biochar to adsorb slow-release fertilizer, characterized in that the crop straw is rice straw, comprising the following steps:
[0036] (1) Straw sorting, collecting rice straw in the farmland, and preliminary cleaning to remove soil, stones and other sundries in the rice straw;
[0037] (2) Drying, spreading the sorted rice stalks in step (1) to dry to remove moisture attached to the rice stalks;
[0038] (3) crushing, adding the rice straw after drying in step (2) into the crushing device for crushing;
[0039] (4) Mix the pore-forming agent, weigh 100 parts of the rice straw crushed in step (3) and put it into the soaking equipment, and add 200 parts of the pore-forming agent solution to soak the rice straw, soak it for 60 minutes, remove it, and air-dry it at low temperature;
[0040] (5) Pyrolysis, put the rice straw obtained in step (4) into a stainless steel reaction tank, heat and crack under continuous nitroge...
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Abstract
The invention discloses a production method of cropstraw porous pyrolysisbiochar adsorption slow release fertilizer. The biological straw includes cropstraw, wheat straw, rice straw and the like; one kind of the crop straw or a mixture of several kinds of crop straw in any ratio can be selected as a raw material, and the porous pyrolysisbiochar adsorption slow release fertilizer is prepared through the steps of straw sorting, airing, breaking, mixing with a pore forming agent, pyrolysis pore forming, fertilizer preparation through adsorption and the like. The production method disclosed bythe invention has the advantages of simple production technology, easily available raw materials, low cost and little environmental pollution and is suitable for large-scale production; the chemicalfertilizer molecules are adsorbed in the pores of the porous pyrolysis biochar and are slowly released in soil, thus the fertilizer efficiency lasts long, and quick loss of the fertility caused by rainwater erosion is avoided.
Description
technical field [0001] The invention relates to the field of soil improvers, in particular to a production method for absorbing slow-release fertilizers by porous pyrolysis biochar of crop straws. Background technique [0002] Land is the most important agricultural production resource, and the improvement of agricultural productivity also overdraws the production potential of the land. On the one hand, the long-term and extensive use of chemical fertilizers has caused problems such as soil compaction and water pollution. On the other hand, high-intensity agricultural production and land use have led to problems such as soil fertility decline, soil acidification, and soil desertification. In addition, in traditional agriculture, straws are often disposed of by incineration on the spot after harvesting crops, resulting in serious air pollution and serious safety hazards. [0003] In addition, after chemical fertilizers are applied, they are easily eroded by rainwater and los...
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