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Biochar soil conditioner and preparation method thereof

A technology of soil conditioner and biochar, which is applied in the field of agricultural chemistry, can solve the problems of improving soil physical and chemical properties, poor fertility effect, and single conditioning effect, so as to solve the problems of soil fertility loss and poor physical and chemical properties, cost saving, and sufficient raw materials. The effect

Active Publication Date: 2017-09-08
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the poor fertility effect of most of the existing technologies, the conditioning effect is single, and it cannot simultaneously improve the physical and chemical properties of the soil, increase the porosity of the soil, increase the nutritional content, retain water and fertilizer, promote the reproduction of beneficial microorganisms, inhibit pests and diseases, and passivate heavy metals. Problem, the invention provides a kind of biochar soil conditioner and preparation method thereof

Method used

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  • Biochar soil conditioner and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0039] Embodiment 1: the preparation of biochar

[0040] Bake the biochar raw material in an oven at 115°C for 20 hours, and pulverize it to obtain a powdered biomass raw material with a particle size of less than 10 cm; raise the temperature of the powdered biomass raw material from normal temperature to 300 °C at a rate of 30 °C / min under anaerobic conditions. ℃, keep warm for 2h, then raise the temperature to 900°C at a rate of 10°C / min, and maintain the temperature for 3h to pyrolyze and carbonize the powdered biomass raw material to obtain unactivated biochar; add 2mol Soak in / L potassium hydroxide, activate for 3-5h, wash at least 3 times with hot water at 80°C and distilled water at room temperature, then soak the biochar in 4mol / L phosphoric acid solution, activate for 3-5h, and wash at 80°C Wash with hot water and distilled water at normal temperature for at least 3 times, dry and pulverize until the particle size is less than 1 mm to obtain biochar.

Embodiment 2

[0041] Embodiment 2: the preparation of biochar

[0042] Bake the biochar raw material in an oven at 115°C for 20 hours, and pulverize it to obtain a powdered biomass raw material with a particle size of less than 10 cm; raise the temperature of the powdered biomass raw material from normal temperature to 300 °C at a rate of 30 °C / min under anaerobic conditions. ℃, keep warm for 2h, then raise the temperature to 900°C at a rate of 10°C / min, and maintain the temperature for 3h to pyrolyze and carbonize the powdered biomass raw material to obtain unactivated biochar; add 1mol Soak in / L potassium hydroxide, activate for 3-5h, wash with hot water at 80°C and distilled water at room temperature for at least 3 times, then soak the biochar in 3mol / L phosphoric acid solution, activate for 3-5h, and wash at 80°C Wash with hot water and distilled water at normal temperature for at least 3 times, dry and pulverize until the particle size is less than 1 mm to obtain biochar.

Embodiment 3

[0043] The preparation of embodiment 3 biochar

[0044] Bake the biochar raw material in an oven at 115°C for 20 hours, and pulverize it to obtain a powdered biomass raw material with a particle size of less than 10 cm; raise the temperature of the powdered biomass raw material from normal temperature to 300 °C at a rate of 30 °C / min under anaerobic conditions. ℃, keep warm for 2h, then raise the temperature to 900°C at a rate of 10°C / min, and maintain the temperature for 3h to pyrolyze and carbonize the powdered biomass raw material to obtain unactivated biochar; add 0.5 Soak in mol / L potassium hydroxide, activate for 3-5 hours, wash with hot water at 80°C and distilled water at room temperature for at least 3 times, then soak the biochar in 2mol / L phosphoric acid solution, activate for 3-5 hours, and wash at 80°C Wash with hot water and distilled water at room temperature at least 3 times, dry and pulverize until the particle size is less than 1 mm to obtain biochar.

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Abstract

The invention relates to a biochar soil conditioner and a preparation method thereof. The soil conditioner is prepared from, by weight, 2-10 parts of biochar, 1-5 parts of pyroligneous liquor, 5-10 parts of composite microorganisms, 3-5 parts of binder and 4-10 parts of organic matter. The soil conditioner can maintain soil fertility by means of the adsorption effect of biochar, adsorb nitrogen, phosphorus and potassium in soil, promote the activity of microorganisms in the soil and microorganism decomposition, improve the soil porosity, reduce the soil bulk density, increase the soil permeability, solve such problems as soil fertility loss and poor physical and chemical properties, effectively solve such a phenomenon as soil acidification, improve the quality of agricultural products, promote early ripening of crops, and increase the yield of the crops.

Description

technical field [0001] The invention relates to the field of agricultural chemistry, in particular to a biochar soil conditioner and a preparation method thereof. Background technique [0002] Soil is the foundation of agricultural production and the most basic means of production in planting. However, at present, land resources are insufficient and the production environment is deteriorating day by day. Problems such as soil erosion, compaction, acidification, heavy metal pollution, and secondary salinization are intensified, which have a bad impact on the growth of crops. [0003] Soil conditioner (Soil Conditioner) is made of agricultural water-retaining agent and natural peat rich in organic matter and humic acid or other organic matter as the main raw materials, supplemented by biologically active ingredients and nutrient elements, and processed by scientific technology. It has extremely remarkable three soil conditioning properties of water retention, fertilization an...

Claims

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Application Information

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IPC IPC(8): C09K17/40C01B32/324C01B32/348C09K101/00
CPCC09K17/40C09K2101/00
Inventor 李刚李军赖兆菲
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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