生态与农村环境学报2011，Vol.27Issue(5)：1-6,6.
免耕对华北平原潮土N2O和CO2排放的影响
Effects of Non-Tillage on N2O and CO2 Emissions From Sandy Loam Soil in the North China Plain
摘要
Abstract
To investigate effects of non-tillage on N2O and CO2 emissions in the North China Plain, a field experiment was conducted to measure N2O and CO2 emissions from soil under conventional tillage and soil that had just assumed non-tillage practice, using closed chamber technique and gas chromatography during the maize growing season. Cumulative N2O emission from the non-tillage soil was 0. 31 kg ? Hm-2, just slightly higher than from the tilled soil, being 0. 27 kg ? Hm-2 . In contrast, non-tillage significantly increased soil CO2 emission by 41.6% compared to tillage ( 1 333 kg ? Hm-2). N2O emission peaks appeared after irrigation, heavy rainfall or consecutive cloudy days. N2O emission peaks in the non-tillage treatment ranged from 28. 1 to 38: 4μg ? M-2 ? H-1 , which were greater than those in the tillage treatment (18. 6 -25. 7 μg ? M-2 ? H-1). N2O and CO2 fluxes in the two tillage systems displayed a significant exponential relationship with soil temperature, and the seasonal variation of N2O and CO2 fluxes could be better explained by soil temperature in tilled soil than in non-tilled soil.关键词
氧化亚氮/二氧化碳/免耕/温室气体/华北平原/潮土Key words
nitrous oxide/ carbon dioxide/ non-tillage/ greenhouse gas/ North China Plain/ fluvo-aquic soil分类
资源环境引用本文复制引用
蔡延江,丁维新,朱安宁,张佳宝..免耕对华北平原潮土N2O和CO2排放的影响[J].生态与农村环境学报,2011,27(5):1-6,6.基金项目
国家自然科学基金(40971134) （40971134）
中国科学院知识创新重要方向性项目(KZCX2-YW-439) （KZCX2-YW-439）
