文献类型： 会议论文

第一作者： Xuechun Wang

作者： Xuechun Wang ¹ ; Shishun Tao ¹ ; Mingde Hao ² ; Wei Li ³ ;

作者机构： 1.School of Life Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan 712100, China

2.Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China

3.Fujian Academy of Agricultural Sciences Central Laboratory Fuzhou, Fujian 350003, China

关键词： the loess plateau;winter wheat;fertilizer;EPIC model

会议名称： IFIP TC 5/SIG 5.1 conference on computer and computing technologies in agriculture

主办单位：

页码： 93-106

摘要： Higher fertilization on winter wheat increased the fluctuation of winter wheat yield in different rainfall years and impacted the sustainable development of winter wheat production on the Loess Plateau. Based on the long term field experimental data at Chagnwu Agricultural Station, this paper evaluated the EPIC model. And this paper also suggested a sustainable fertilizer level for winter wheat, based on the analysis of simulation results in different rainfall regions. Results of this study indicated that: 1) The EPIC model simulated both winter wheat yields and soil water among different fertilizer levels well, with the mean R value of 0.91 and 0.89 respectively. 2) With the increasing of fertilizer, the value of IRFG (Increase Rate of Grain yield by Fertilizer) and WUEG (Water Using Rfficiency for Grain yield) became higher, when soil water in deep soil was not be used excessively; however, the value of IRFG became lower, when soil water in deep soil was used excessively. 3) In the semi-humid region, fertilizer for winter wheat should be from N_4 to N_5; in the semi-humid and drought-prone region and in the semi-arid region, it should be from N_3 to N_4; in the semi-arid and drought-prone region, it should be lower than N_3.

分类号： S1`TP3