生物质炭对菜地土壤甲烷和氧化亚氮及二氧化碳排放的影响

Effect of Biochar on Soil Greenhouse Gases Emission

以菜地土壤为供试土壤,通过室内盆栽试验,研究不同生物质炭原料(毛竹粉、稻草)、不同生物质炭添加量(0.5%、1%干土)对土壤甲烷、氧化亚氮和二氧化碳排放的影响。试验结果表明,与不添加生物质炭相比,添加生物质炭可以有效减少土壤温室气体的排放;其中相同添加量的稻草炭的有效性高于毛竹炭;相同原料的生物质炭其添加量越多,温室气体排放量越小;在生物质炭施加初期,对甲烷排放的影响较少,但随着时间推移,影响效果增强,而对氧化亚氮、二氧化碳排放的影响正相反;生物质炭对氧化亚氮的影响强度高于甲烷与二氧化碳。

In this paper, vegetable soil as the experimental soil, through the indoor pot experiment, study the dif-ferent biochar materials （bamboo powder, rice straw）, different kinds of biomass carbon amounts （ 0.5%, 1%dry soil） effects on soil methane and carbon dioxide emissions, nitrous oxide. The test results show that, compared with not adding biochar, biochar addition can be effective in reducing greenhouse gases emissions;the same add-ed effective straw biochar is higher than that of bamboo biochar;the same raw material of biochar, the more add-ed amount of biochar the less greenhouse gas emissions;applied early in the biomass carbon, effects on methane emission less, but with the time, the effect is enhanced, and the nitrous oxide, carbon dioxide emissions is having the opposite effect;biochar impact on nitrous oxide strength higher than that of methane and carbon dioxide.