Using the DSSAT model to simulate wheat yield and soil organic carbon under a wheat-maize cropping system in the North China Plain

文献类型： 外文期刊

第一作者： Liu Hai-long

作者： Liu Hai-long;Zhu Ye-ping;Liu Sheng-ping;Li Shi-juan;Liu Hong-bin;Lei Qiu-liang;Zhai Li-mei;Wang Hong-yuan;Zhang Ji-zong;Zhang Jing-suo;Liu Xiao-xia

作者机构：

关键词： DSSAT;wheat-maize rotation;model evaluation;long-term experiment;yield;soil organic carbon

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2017 年 16 卷 10 期

页码：

收录情况： SCI

摘要： Crop modelling can facilitate researchers' ability to understand and interpret experimental results, and to diagnose yield gaps. In this paper, the Decision Support Systems for Agrotechnology Transfer 4:6 (DSSAT) model together with the CENTURT soil model were employed to investigate the effect of low nitrogen (N) input on wheat (Triticum aestivum L.) yield, grain N concentration and soil organic carbon (SOC) in a long-term experiment (19 years) under a wheat-maize (Zea mays L.) rotation at Changping, Beijing, China. There were two treatments including NO (no N application) and N150 (150 kg N ha(-1)) before wheat and maize planting, with phosphorus (P) and potassium (K) basal fertilizers applied as 75 kg P2O5 ha(-1) and 37.5 kg K2O ha(-1), respectively. The DSSAT-CENTURY model was able to satisfactorily simulate measured wheat grain yield and grain N concentration at NO, but could not simulate these parameters at N150, or SOC in either N treatment. Model simulation and field measurement showed that N application (N150) increased wheat yield compared to no N application (NO). The results indicated that inorganic fertilizer application at the rates used did not maintain crop yield and SOC levels. It is suggested that if the DSSAT is calibrated carefully, it can be a useful tool for assessing and predicting wheat yield, grain N concentration, and SOC trends under wheat-maize cropping systems.

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