Method for reducing emission of nitrous oxide in soil of camellia oleifera forest by utilizing bamboo reed charcoal

Abstract

The invention discloses a method for reducing the emission of nitrous oxide in the soil of a camellia oleifera forest by utilizing bamboo reed biochar, belonging to the field of emission reduction ofgreenhouse gas. The method comprises the following specific steps: step 1, preparation of a raw material: harvesting mature bamboo reeds, cutting the stems of the mature bamboo reeds into bamboo reedpieces with lengths in a range of 1-3 cm, drying the bamboo reed pieces in the air for 1 day, and drying the bamboo reed pieces in a drying oven for a plurality of hours; step 2, carbonization of thebamboo reed pieces: transferring the bamboo reed pieces into a muffle furnace, carrying out heating to a carbonizing temperature in an inert gas atmosphere, keeping the carbonized bamboo reed pieces at a constant temperature for a plurality of hours, and performing natural cooling to room temperature to obtain the bamboo reed biochar; step 3, treatment of the bamboo reed biochar: grinding and sieving the bamboo reed biochar, taking bamboo reed biochar with fineness of 80 to 40 meshes, and treating the bamboo reed biochar with 200 ml of a hydrogen chloride solution with a concentration of 1 mol / L for 10 hours to remove ash in the bamboo reed biochar; step 4, biochar activation: activating the biochar by adopting a KOH method, wherein the BET specific surface area of the activated biochar isnot less than 1200 m<2> / g; and step 5, biochar-soil mixing: mixing the bamboo reed biochar with soil according to a ratio of 1%-5%, adding water after uniform mixing, and enabling the water content of the soil to reach 60% or above.

Description

technical field [0001] The invention relates to the technical field of greenhouse gas emission reduction, in particular to a method for reducing nitrous oxide emission in camellia oleifera forest soil by using reed bamboo biochar. Background technique [0002] Nitrous oxide is one of the most important greenhouse gases in the atmosphere, which mainly comes from the process of nitrification and denitrification of soil. In recent years, more and more studies have shown that in middle- and high-latitude and high-altitude regions, soil nitrous oxide emissions during freeze-thaw periods account for an important proportion of the total annual emissions. In the context of global warming, how to curb this part of the emissions has become a research hotspot in this field. As a new soil amendment, biochar has shown a certain potential in reducing soil nitrous oxide emissions. [0003] The type of tree species in the plantation had a significant impact on the nitrogen dioxide emissio...

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the bamboo is directly sown into the soil after being carbonized, and the specific surface area, pore size and distribution, density and adsorption capacity of the biochar have not been improved, and the nitrogen dioxide adsorption capacity of the soil is limited.