文献类型： 会议论文

第一作者： Yuntong Liu

作者： Yuntong Liu ¹ ; Yong Li ² ; Yu'e Li ³ ; Yunfan Wan ¹ ; Deli Chen ⁴ ; Qingzhu Gao ¹ ; Xiaobo Qin ⁴ ;

作者机构： 1.Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences

2.Beijing 100081, China, and Department of Resource Management & Geography, Melbourne School of Land and Environment, The University of Melbourne, Victoria 3010, Australia

3.Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Hunan 410125, China, and Department of Resource Management & Geography, Melbourne School of Land and Environment, The University of Melbourne, Victoria 3010, Australia

4.Beijing 100081, China

关键词： N_2O Emissions;maize-cropped soil;WNMM simulation;impact of climatic variation

会议名称： World Congress of Soil Science

主办单位：

页码： 4512-4515

摘要： The Water and Nitrogen Management model (WNMM) was applied to simulate N_2O emissions from a semi-arid and maize-cropping system on a loam soil at Yuci in the North China Plain (NCP) from May 2007 to September 2007. WNMM satisfactorily simulated cropgrowth, soil water content and soil temperatures at depth and N_2O emissions from the soil, compared with the field observations during calibration and validation. About 89% of total N_2O emissions were estimated as nitrification-induced, according to WNMM simulation for this semi-arid and intensively cultivated maize-cropped soil. The calibrated and validated WNMM was then deployed to simulate N_2O emissions from this soil from 1951 to 2007 for nine management scenarios of N fertiliser application at Yuci. This sensitivity test found that the annual N_2O emissions for this system were significantly correlated to annual N fertiliser application rate (r=0.81) and maize yield (p=0.43). Based on this 57-year simulation, multivariate regression models forestimating annual N_2O emissions were developed to account for climatic variation (including annual solar radiation and rainfall) for this semi-arid and intensively cultivated maize-cropping system in the NCP.

分类号： S15-532