农业环境科学学报2018，Vol.37Issue(1)：196-204,9.DOI:10.11654/jaes.2017-0876
尿素和生物质炭对茶园土壤pH值及CO2和CH4排放的影响
The effect of wheat-straw derived biochar on the soil pH and emissions of CO2 and CH4 from tea garden soil
摘要
Abstract
Laboratory experiments were conducted to study the effect of biochar addition on the amelioration of acidified tea garden soil and the resultant greenhouse gas emissions.Different amounts of wheat-straw derived biochar(no biochar(BO):0 g· kg-1;low biochar(B1):10g· kg-1;medium biochar(B2):30 g· kg-1;and high biochar(B3):50 g· kg-1;with or without urea (N or N0)) were added to tea garden soil.The effects of these biochar additions on soil pH,as well as CO2 and CH4 emissions was measured.The results indicate that the addition of biochar significantly improved the acidified tea garden soil pH(P＜0.05).The soil pH was found to increase with an increasing application rate of biochar,with the soil pH valuc for N0B1,N0B2,and N0B3 increasing by 0.18,0.53,and 1.06,respectively.A high biochar(B3) application rate resulted in higher cumulative emissions of CO2 and CH4.A 3％ addition of biochar was enough to improve soil pH within a short period of time.When biochar was combined with urea for addition to the soil,higher soil pH values and CO2 emissions were observed,while CH4 emissions were inhibited compared to biochar addition alone.Therefore,the addition of biochar has a more positive effect on the amelioration of acidic soils when soil acidification is not serious.A lower addition rate of biochar is recommended to improve soil pH,while decreasing the emission of greenhouse gases.关键词
茶园/尿素/小麦秸秆生物质炭/pH/CO2/CH4Key words
tea garden/urea/wheat-straw derived biochar/pH/CO2/CH4分类
资源环境引用本文复制引用
蒋梦蝶,何志龙,孙赟,周维,胡荣桂,林杉..尿素和生物质炭对茶园土壤pH值及CO2和CH4排放的影响[J].农业环境科学学报,2018,37(1):196-204,9.基金项目
国家重点基础研究发展规划(973)项目(2012CB417100) （973）
中央高校基本科研业务费专项(2662016PY098) （2662016PY098）
国家自然科学基金项目(41201255)The National Basic Research Program of China(2012CB417100) （41201255）
The Fundamental Research Funds for the Central Universities(2662016PY098) （2662016PY098）
The National Natural Science Foundation of China(41201255) （41201255）
