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Using the DSSAT model to simulate wheat yield and soil organic carbon under a wheat-maize cropping system in the North China Plain 被引量:3
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作者 LIU Hai-long LIU Hong-bin +8 位作者 LEI Qiu-liang ZHAI Li-mei WANG Hong-yuan ZHANG Ji-zong zhuye-ping LIU Sheng-ping LI Shi-juan ZHANG Jing-suo LIU Xiao-xia 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2017年第10期2300-2307,共8页
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) m... 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 P205 ha-1 and 37.5 kg K^O ha-~, 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. 展开更多
关键词 DSSAT wheat-maize rotation model evaluation long-term experiment YIELD soil organic carbon
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