Soil conditioner and preparation method thereof
A soil conditioner and activator technology, applied in the field of agricultural chemistry, can solve the problems of improving soil physical and chemical properties, single conditioning effect, poor fertility effect, etc., to achieve the effect of solving soil fertility loss, reducing soil bulk density, and sufficient raw materials
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Embodiment 1
[0040] Embodiment 1: the preparation of biochar
[0041] 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
[0042] Embodiment 2: the preparation of biochar
[0043] 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
[0044] The preparation of embodiment 3 biochar
[0045] 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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