Method for improving north acidified soil by utilizing biochar

A biochar and soil technology, applied in the restoration of polluted soil, etc., can solve the problems of poor economic efficiency of comprehensive utilization, low degree of commercialization and industrialization, and achieve the goal of improving soil nutrient utilization rate, simple use, and improving soil quality Effect

Inactive Publication Date: 2012-09-19
青岛贝尔卡环境生物工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still quite a lot of peanut shells that have not been utilized, and those that have been utilized are mostly extensive and low-level utilization, which results in poor economic efficiency and low commercialization and industrialization of these agricultural residues.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Crush peanut shells into small pieces with a diameter of 0.1 cm, dry them at 60°C and place them in a vacuum tube furnace, and pass through N at a flow rate of 500ml / min. 2 For 30 minutes, the gas in the furnace body was exhausted, heated to 400°C at a heating rate of 5°C / min, kept at 400°C for 1 hour, and then cooled to room temperature to obtain black biochar. Crush the biochar into a powder with a diameter of less than 2mm, and apply it to the orchard soil to be repaired according to the mass ratio of biochar: soil = 1:100.

[0035] After 49 days of biochar application, the soil pH increased by 0.5 units, the soil bulk density decreased from 1.23g / ml to 1.17g / ml, the organic matter content increased from 14.2g / kg to 16.8g / kg, and the soil quality improved.

Embodiment 2

[0037] Crush the peanut shells into small pieces with a diameter of 2 cm, dry them at 60°C and put them in a vacuum tube furnace, and pass through N at a flow rate of 500ml / min. 2 After 30 minutes, the gas in the furnace body was exhausted, heated to 400°C at a heating rate of 5°C / min, kept at 400°C for 2 hours, and then cooled to room temperature to obtain black biochar. Crush the biochar into a powder with a diameter of less than 2mm, and apply it to the orchard soil to be repaired according to the mass ratio of biochar:soil=5:100.

[0038] After 49 days of biochar application, the soil pH increased by 1.4 units, the soil bulk density decreased from 1.23g / ml to 1.13g / ml, the organic matter content increased from 14.2g / kg to 22.8g / kg, and the soil quality was greatly improved.

Embodiment 3

[0040] Crush the peanut shells into small pieces with a diameter of 2 cm, dry them at 60°C and put them in a vacuum tube furnace, and pass through N at a flow rate of 500ml / min. 2 After 30 minutes, the gas in the furnace body was exhausted, and the temperature was raised to 400°C at a heating rate of 5°C / min, kept at 400°C for 1.5 hours, and then cooled to room temperature to obtain black biochar. Crush the biochar into a powder with a diameter of less than 2mm, and apply it to the orchard soil to be repaired according to the mass ratio of biochar:soil=3:100.

[0041] After 49 days of biochar application, the soil pH increased by 1.1 units, the soil bulk density decreased from 1.23g / ml to 1.18g / ml, the organic matter content increased from 14.2g / kg to 20.8g / kg, and the soil quality was greatly improved.

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Abstract

The invention relates to a method for improving north acidified soil by utilizing biochar. The method comprises the steps of: grinding peanut shells into slices with diameter of 2cm, drying at 60 DEG C, putting in a vacuum tubular furnace, leading in N for 230 minutes at flow velocity of 500ml/min, emptying gas in the furnace body, heating to 400 DEG C under condition of rising rate of 5 DEG C/min, maintaining 400 DEG C for two hours, then cooling to room temperature, thus obtaining black biochar; and grinding the biochar into powder with diameter smaller than 2mm, and applying the biochar and soil with 1 to 5 percent mass ratio into orchard soil or farmland to be restored. The method has the advantages of being simple to use, obviously improving the quality of soil, improving utilization rate of soil nutrient, being simple to use and obvious and endurable in effects, and providing a new way for improving north acidified soil.

Description

technical field [0001] The invention relates to the technical field of soil ecological restoration, in particular to a method for using biochar to improve northern acidified soil. [0002] Background technique [0003] With the development of social economy and agriculture, due to the long-term excessive application of nitrogen fertilizer and other reasons, the area and degree of acidification soil in northern my country are gradually increasing. Excessive application of nitrogen fertilizers is the main cause of farmland soil acidification. In the past 20 years, up to 90% of the northern farmland soils have experienced varying degrees of acidification. Among them, the degree of soil acidification of economic crops dominated by greenhouse vegetables and orchards is more serious. Soil acidification not only causes the loss of nutrient elements in the soil, but also increases the solubility of various metals and heavy metal compounds in the soil, which leads to the increase o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 宿兴华
Owner 青岛贝尔卡环境生物工程有限公司
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