应用生态学报2013，Vol.24Issue(3)：690-696,7.
应用DNDC模型分析管理措施对稻麦轮作系统CH4和N2O综合温室效应的影响
Effects of farming managements on the global warming potentials of CH4 and N2O from a rice-wheat rotation system based on the analysis of DNDC modeling
摘要
Abstract
Taking a rice-wheat rotation system in the suburb of Nanjing, Jiangsu Province of East China as test object, this paper studied the fluxes of CH4 and N2O and their annual dynamics under different farming managements in 2010-2011, and the field observation data were applied to validate the process-based model, denitrification-decomposition (DNDC) model, aimed to approach the applicability of the model to this rotation system, and to use this model to simulate the effects of different environmental factors and farming managements on the global wanning potentials (GWPs) of CH4 and N2O.The results showed that except in the treatment control and during wheat growth season, the simulated cumulative emissions of CH4 and N2O from the rotation system in all treatments were basically in coincide with the observed data, the relative deviations being from 7.1% to 26.3% , and thus, the DNDC model could be applied to simulate the GWPs of cumulative emissions of CH4 and N2O as affected by various environmental factors or management practices.The sensitivity test showed that the GWPs of CH4 and N2O varied significantly with the changes of environmental factors such as the mean annual air temperature, soil bulk density, soil organic carbon, soil texture, and soil pH.Farming managements such as N fertilization, straw returning, and duration of mid-season drainage also had significant effects on the GWPs of CH4 and N2O.Therefore, the above-mentioned environmental factors and fanning managements should be taken into account to estimate the greenhouse gases emission from the rice-wheat cropping system on site-specific or regional scale.关键词
稻麦轮作/DNDC模型/甲烷/氧化亚氮/综合温室效应Key words
rice-wheat rotation/ denitrification-decomposition (DNDC) model/ CH4/ N2O/ global warming potential (GWP)分类
天文与地球科学引用本文复制引用
张啸林,潘晓健,熊正琴,王金阳,杨波,刘英烈,刘平丽..应用DNDC模型分析管理措施对稻麦轮作系统CH4和N2O综合温室效应的影响[J].应用生态学报,2013,24(3):690-696,7.基金项目
公益性行业农业科研专项(200903003)、教育部新世纪人才支持计划项目(NCET-10-0475)、国家自然科学基金项目(40971139,41171238)、博士点基金项目(20110097110001)和中央高校基本科研业务费专项(KYZ201110)资助. （200903003）
