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当前位置: 首页 > 文章 > Using the DSSAT model to simulate wheat yield and soil organic carbon under a wheat-maize cropping system in the North China Plain 农业科学学报 (英文) 2017,16 (10)
Position: Home > Articles > Using the DSSAT model to simulate wheat yield and soil organic carbon under a wheat-maize cropping system in the North China Plain Journal of Integrative Agriculture 2017,16 (10)

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

作  者：
Liu Hai-long;Liu Hong-bin;Lei Qiu-liang;Zhai Li-mei;Wang Hong-yuan;Zhang Ji-zong;Zhu Ye-ping;Liu Sheng-ping;Li Shi-juan;Zhang Jing-suo;Liu Xiao-xia
单  位：
Beijing Municipal Stn Agroenvironm Monitoring, Beijing 100029, Peoples R China;Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr, Key Lab Nonpoint Source Pollut Control, Beijing 100081, Peoples R China;Chinese Acad Agr Sci, Inst Agr Informat, Minist Agr, Key Lab Agriinformat Serv Technol, Beijing 100081, Peoples R China
关键词：
DSSAT;wheat-maize rotation;model evaluation;long-term experiment;yield;soil organic carbon
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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