A method for in-situ carbonization of agricultural and forestry solid waste and improving continuous cropping obstacles

A technology of solid waste and continuous cropping obstacles, applied in the fields of land preparation, agriculture, agricultural machinery and implements, etc., can solve the problems of complex biomass carbonization process, low soil organic matter content, low effective utilization rate, etc., to improve crop yield, increase Soil organic matter, the effect of carbon sequestration and emission reduction

Active Publication Date: 2021-04-23
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the current problems of low effective utilization rate of agricultural and forestry solid waste, serious incineration pollution, low soil organic matter content, serious continuous cropping obstacles, and complicated biomass carbonization process, the present invention provides a method for on-site carbonization of agricultural and forestry solid waste and improvement of continuous cropping obstacles. The method, the present invention can effectively treat agricultural and forestry solid waste in the land, avoid environmental pollution, increase soil organic carbon content, improve soil fertility, kill harmful pathogenic microorganisms in soil and biomass, and improve soil continuous cropping obstacles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Upland rice has been continuously planted in a plot for 3 years, and under the same conditions of cultivation and fertilization, the yield of upland rice in the first year of the plot is 240kg / mu, the yield of upland rice in the second year is 210kg / mu, and the yield of upland rice in the third year is 170kg / mu ;After harvesting the upland rice in the third year, treat the soil of the plot by carbonizing agricultural and forestry solid waste and returning it to the field and improving the obstacles to continuous cropping;

[0025] A method for on-site carbonization of agricultural and forestry solid waste and improvement of continuous cropping obstacles, the specific steps are as follows:

[0026] (1) Dry the agricultural and forestry solid waste (rice straw) to a moisture content of ≤12%, and crush it to a length of ≤20cm to obtain a biomass segment;

[0027] (2) Plow the soil to the plow layer, plow till the soil particle size is ≤10cm, and then dry the plo...

Embodiment 2

[0032] Example 2: A plot of corn has been continuously planted for 3 years, and under the same conditions of cultivation and fertilization, the corn yield of the plot is 800kg / mu in the first year and 720kg / mu in the second year; after harvesting the corn in the second year , the soil of the plot was treated by carbonizing agricultural and forestry solid waste on site and improving the obstacles to continuous cropping;

[0033] A method for on-site carbonization of agricultural and forestry solid waste and improvement of continuous cropping obstacles, the specific steps are as follows:

[0034] (1) Dry agricultural and forestry solid waste (corn stalks) to a moisture content of ≤10%, and crush it to a length of ≤18cm to obtain biomass segments;

[0035] (2) Plow the soil to the plow layer, harrow until the soil particle size is ≤9cm, and then dry the harrowed soil until the moisture content is ≤14% to obtain soil particles;

[0036] (3) Sieve the soil particles in step (2) to...

Embodiment 3

[0040] Example 3: Rapeseed has been continuously planted in a plot for 4 years, and under the same condition of cultivation and fertilization, the yield of rapeseed in the plot is 420kg / mu in the first year, 400kg / mu in the second year, and 350kg / mu in the third year , the output of rapeseed in the fourth year is 280kg / mu; after the rapeseed is harvested in the fourth year, the soil of the plot is treated by carbonizing agricultural and forestry solid waste and returning it to the field and improving continuous cropping obstacles;

[0041] A method for on-site carbonization of agricultural and forestry solid waste and improvement of continuous cropping obstacles, the specific steps are as follows:

[0042] (1) Dry the agricultural and forestry solid waste (rape straw) to a moisture content of ≤11%, and crush it to a length of ≤16cm to obtain a biomass segment;

[0043] (2) Plow the soil to the plow layer, harrow until the soil particle size is ≤9cm, and then dry the harrowed s...

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PUM

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Abstract

The invention relates to a method for on-site carbonization of agricultural and forestry solid waste and improvement of continuous cropping obstacles, and belongs to the technical field of biomass carbonization. The invention drys and pulverizes agricultural and forestry solid wastes to obtain biomass segments; plows the soil to the plow layer, plows till the soil particle diameter is less than or equal to 10 cm, and then dries the soil after plowing to obtain soil particles; sieves the soil particles to obtain particles Soil particle A with a diameter ≥ 3cm and soil particle B with a particle size < 3cm, the soil particle A and the biomass section are evenly mixed and piled into several evenly distributed conical mounds, and the soil particle B is evenly covered on the conical mound Above: The conical mound is ignited at the upwind position of the conical mound. At a temperature of 250-400°C, the biomass in the conical mound reacts with low-temperature pyrolysis carbonization and heats the soil; the conical mound is cooled to the environment After the temperature is reached, it is flattened to obtain cultivated soil. The invention can effectively treat agricultural and forestry solid waste in the land, avoid environmental pollution, increase soil organic carbon content, and improve soil fertility.

Description

technical field [0001] The invention relates to a method for on-site carbonization of agricultural and forestry solid waste and improvement of continuous cropping obstacles, and belongs to the technical field of biomass carbonization. Background technique [0002] At present, with the advancement of urbanization and the rapid development of industry in my country, the management and investment of agricultural and forestry land are increasingly weakened. A large amount of agricultural and forestry solid waste, such as crop straw, has not been effectively utilized, and has been piled up for a long time to occupy land, or even burned in large quantities. Increased environmental pressure and exacerbated environmental pollution. However, nowadays, as environmental problems become more and more serious, low-carbon, recycling and sustainability have become the objective needs of my country's agricultural development. The sustainable development of agriculture, in the final analysis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01B79/00
CPCA01B79/00
Inventor 田森林赵群李英杰柴小龙黄建洪胡学伟曹妍耿映雪屠依娜党雅馨
Owner KUNMING UNIV OF SCI & TECH
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