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Method for utilizing bamboo reed charcoal to reduce soil nitrous oxide discharge

A nitrous oxide, biochar technology, applied in chemical instruments and methods, biofuels, land preparation methods, etc., to improve soil fertility, the method is simple, and the effect of soil improvement

Inactive Publication Date: 2013-04-24
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, Arundox reeds is used as raw material to prepare biochar and the prepared biochar is used to reduce farmland soil N 2 The emission of O has not yet been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Using the above-ground stems of Arundos reeds as raw materials, remove the leaves from the above-ground stems of Arundis, cut into 1 cm sections, air-dry, and store for later use. Place the air-dried Arundis in an atmosphere furnace, feed high-purity nitrogen at a rate of 300 mL / min as a protective gas, raise the rate of 10 °C / min to 350 °C for carbonization for 2 h, and naturally cool to room temperature under the protection of nitrogen. The soil was collected from a corn field in the suburb of Chengyang District, Qingdao City, Shandong Province. After the soil is picked up, clean up debris, grass roots and other sundries, air-dry them, pass through a 2mm soil sieve, put them into cultivation tanks, 60g per tank, and mix the biochar crushed to 2mm with the soil evenly at a ratio of 5%. Cultivate at 30°C for 7 days, and keep the soil water content at 100% during the cultivation. Gas samples were collected periodically during the incubation period, N 2 The O content wa...

Embodiment 2

[0021] Use reed bamboo leaves as raw materials, cut into 5cm pieces, air-dry, and store for later use. Put the air-dried reed bamboo leaves in an atmosphere furnace, feed high-purity nitrogen at a rate of 200mL / min as a protective gas, raise the rate of 5°C / min to 600°C for carbonization for 1.5h, and naturally cool to room temperature under the protection of nitrogen . The soil was collected from vegetable greenhouses in the suburbs of Chengyang District, Qingdao City, Shandong Province. After the soil is picked up, clean up debris, grass roots and other sundries, air-dry, pass through a 2mm soil sieve, put into cultivation tanks, 60g per tank, mix the biochar crushed to 1mm with the soil evenly at a ratio of 1%. Cultivate at 25°C for 30 days, and keep the soil water content at 80% during the cultivation. Gas samples were collected periodically during the incubation period, N 2 The O content was determined by gas chromatography. The experimental results showed that during...

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Abstract

The invention relates to a method for utilizing bamboo reed charcoal to reduce agricultural soil nitrous oxide (N2O) discharge and belongs to the technical field of greenhouse gas emission reduction. The method for utilizing the bamboo reed charcoal to reduce agricultural soil N2O discharge aims at reducing the soil N2O discharge caused by massive use of nitrogenous fertilizer in the agricultural production process. The technical scheme is that the method comprises the steps of first airing collected bamboo reed, cutting the bamboo reed into small sections of 1-5cm, preparing the bamboo reed into the charcoal in a thermal cracking method at 200-650 DEG C under protection of inert gases with the flow velocity of 200-500mL / min; smashing the well prepared charcoal into particles of 1-5mm, enabling the particles to be fully mixed with agricultural soil according to the proportion of 0.1-10%, keeping soil moisture content at 70-110%, and performing culture for 6-100 days at 20-30 DEG C so that the discharge of N2O in the agricultural soil can be effectively reduced. The method can be used for ordinary farmland soil and can also be used for facility agricultural soil.

Description

technical field [0001] The invention belongs to the technical field of greenhouse gas emission reduction, in particular to a method for reducing soil nitrous oxide (N 2 O) Method of discharge. Background technique [0002] N 2 O is an important greenhouse gas, the content of which is about 320ppb in the atmosphere, but it is of great significance to the global atmospheric environment. N 2 O can absorb infrared radiation, and its global warming potential is 298 times and 11.9 times that of carbon dioxide and methane of the same mass, respectively, and it persists in the atmosphere for up to 114 years. At the same time, N 2 O can react with ozone in the stratosphere, and is currently the most important emission to deplete the ozone layer, and has become the chief culprit in the destruction of the ozone layer in the 21st century. [0003] Atmospheric N 2 The annual escape amount of O is 16.4Tg (1Tg=10 12 g) Nitrogen, and increase at a rate of 0.2% to 0.3% per year. Atmo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/00C10B53/02C09K17/02
CPCY02E50/10
Inventor 郑浩王震宇李锋民罗烨姜志祥
Owner OCEAN UNIV OF CHINA
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