植物营养与肥料学报2012，Vol.18Issue(1)：77-88,12.
稻麦轮作农田氮素循环的DNDC模型分析
Evaluating the validity and sensitivity of the DNDC model to estimate nitrogen cycling in rice-wheat rotation system
摘要
Abstract
Based on in situ measurements of ammonia volatilization and nitrous oxide （N2O） emission from a wheat-rice rotation field, as a representative of cropping system in Yangtze Plain, the reliability and sensitivity of Denitrification-Deeomposition model （DNDC） for forecasting nitrogen cycling and balance were tested in field scale, and influencing factors of various N cycling pathways were identified. A higher reliability was found between soil ammonia volatilization and N2O emission simulated by DNDC model and field results, suggesting that the DNDC model could be used for describing nitrogen loss under different nitrogen fertilizer managements. According to sensitivity test on the DNDC model, both grain yield and crop N uptake were significantly affected by temperature and nitrogen application rate, ammonia volatilization was significantly influenced by fertilizer N type and nitrogen application rate, N2O emission significantly affected by temperature, soil pH and soil organic carbon. More work is needed to improve the validation of DNDC model to estimate ammonia volatilization and N2O emission.关键词
稻麦轮作/氮循环/DNDC模型/敏感性分析Key words
rice-wheat rotation system/nitrogen cycling/DNDC model/sensitivity analysis分类
农业科技引用本文复制引用
夏文建,周卫,梁国庆,王秀斌,孙静文,李双来,刘光荣..稻麦轮作农田氮素循环的DNDC模型分析[J].植物营养与肥料学报,2012,18(1):77-88,12.基金项目
国家再点荩础研究发展讣划课题(2007CB109307) （2007CB109307）
公益性行业(农业)科研专项(201003016) （农业）
同家水稻产业技术体系课题 （）
中央级公益性科研院所基本科研业务费专项资金资助. （）
