Method for using Miscanthus sinensis biochar as soil organic silicon fertilizer

A biochar and organosilicon technology, applied in the application, fertilization device, fertilizer mixture and other directions, can solve the problems of odorous harmful volatile organic compounds, complex process, environmental pollution, etc., to improve photosynthetic efficiency, simple process and long-lasting repair effect. Effect

Inactive Publication Date: 2019-09-24
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main purpose of this patent is to produce biochar with high effective silicon. The raw material u

Method used

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  • Method for using Miscanthus sinensis biochar as soil organic silicon fertilizer
  • Method for using Miscanthus sinensis biochar as soil organic silicon fertilizer
  • Method for using Miscanthus sinensis biochar as soil organic silicon fertilizer

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Embodiment 1

[0029] Miscanthus collected in the field was put into three sets of tube furnaces N 2 Under the atmosphere, the heating rate was 10°C / min, and the three groups of miscanthus were pyrolyzed and carbonized at 300°C, 500°C, and 700°C for 2 hours, respectively, to obtain Miscanthus biochar. After analysis, the total silicon content was enriched from 66.8±5.46mg / g in the original Miscanthus biomass to 223±4.32mg / g, 636±7.08mg / g and 722±7. 29.7 mg / g. Among them, the water-soluble silicon increased from 1.15±0.054mg / g in the original Miscanthus biomass to 4.39±0.29mg / g, 71.6±0.65mg / g and 87.2±1.02mg in charcoal at 300°C, 500°C, and 700°C, respectively / g.

Embodiment 2

[0031] Put miscanthus collected in the field and rice straw collected in farmland into a tube furnaceN 2 Under the atmosphere, the heating rate was 10°C / min, and pyrolysis and carbonization were carried out at 700°C for 2 hours to obtain Miscanthus biochar and straw biochar, respectively. After analysis, the total silicon content (722±29.7mg / g) in miscanthus biochar was significantly higher than that in straw biochar (614±15.3mg / g), and its water-soluble silicon content (87.2±1.02mg / g) was also significantly higher and straw biochar (77.1±5.22mg / g), both of which are much higher than the total silicon and water-soluble silicon levels of soil in my country.

Embodiment 3

[0033] Put miscanthus collected in the field, rice husks collected in farmland and kenaf stalks harvested in the field into a tube furnaceN 2 Under atmosphere, the heating rate was 10°C / min, and pyrolysis and carbonization were carried out at 700°C for 2 hours to obtain Miscanthus biochar, rice husk biochar and kenaf biochar respectively. After analysis, the total silicon content of the three were 722±29.7mg / g, 771±25.2mg / g and 30.3±1.08mg / g respectively. In the long-term repeated water-soluble silicon leaching (the prepared biochar was leached for 24 hours each time, and the data were obtained after 15 rounds of leaching), it was found that the silicon dissolution of Miscanthus biochar was the highest and stable (35.8±1.39mg / g~75.0±1.64 mg / g), significantly higher than that of rice husk biochar (11.0±0.50mg / g~25.4±1.01mg / g), much higher than that of kenaf biochar (0.343±0.019mg / g~1.78±0.214mg / g).

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Abstract

The invention provides a method for using Miscanthus sinensis biochar as soil organic silicon fertilizer, wherein the Miscanthus sinensis biochar is applied into farmland, and the surface layer of the soil with the depth of 0-30 centimeter is ploughed to fully mix with the Miscanthus sinensis biochar, wherein that amount of the Miscanthus sinensis biochar is 1-3% of the mass of the soil. The biochar is prepared from grass family Miscanthus sinensis, the selected raw material is perennial tall herbaceous plant containing rich lignocellulose and is a wild weed widely grown on wasteland such as forest edge or roadside in tropical and subtropical regions of China, and is easier to obtain in large quantities and has economy compared with other raw materials. In addition, the invention uses raw materials to directly carbonize, the process is simple, and no secondary pollution is generated. In addition, the Miscanthus sinensis biochar of the present invention has the ability of long-term silicon dissolution when used.

Description

technical field [0001] The invention relates to the technical field of soil fertilizers, in particular to a method for using Miscanthus biochar as soil organic silicon fertilizer. Background technique [0002] Silicon is the second most abundant element in the earth's crust, and it is also a very important element in the process of plant growth and development. Appropriate application of silicon fertilizer can promote the growth and development of crops, regulate the nutrient absorption of crops, enhance the disease resistance of plants, increase the yield of agricultural products, etc., and can also improve the soil and accelerate the maturation of the soil. In addition, silicon fertilizer can also effectively reduce the risk of nitrogen and phosphorus loss, activate nitrogen and phosphorus nutrients in the soil, reduce the transpiration efficiency of plants, and improve water use capacity, thereby saving irrigation and reducing soil nitrogen and phosphorus loss. [0003] ...

Claims

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Application Information

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IPC IPC(8): C05D9/00C05G3/04C05G3/80
CPCC05D9/00C05G3/80
Inventor 晁元卿李锐敏林庆祺王诗忠汤叶涛仇荣亮
Owner SUN YAT SEN UNIV
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