Simulation of rice yield under different irrigation and nitrogen application managements by CropSyst model

Acta Agriculturae Slovenica

卷:103

Mojtaba REZAEI¹  Narjes ZARE²  Mohammadreza KHALEDIAN²  Nader PIRMORADIAN² 

[1] Rice Research Institute, Rasht, Iran;

[2] Water Engineering Department, Faculty of Agricultural Sciences, University of Guilan;

关键词: oryza;    rice;    irrigation;    flood irrigation;    fertilizer application;    nitrogen;    plant models;   

DOI  :  10.14720/aas.2014.103.2.3

来源: DOAJ

【 摘 要 】

The aim of this study was the calibration and validation of CropSyst model for rice in the city of Rasht. The necessary data were extracted from a field experiment which was carried out during 2005-2007 in a split-plot design. The main plots were irrigation regimes including continuous flooding irrigation and 5-day irrigation intervals. The subplots consisted of four nitrogen levels: zero N application, 45, 60 and 75 kg N ha^-1. Normalized Root Mean Squared Error (nRMSE) and Residual Mass Coefficient (Crm) in calibration years were 9.3 % and 0.06, respectively. In validation year, nRMSE and Crm were 9.7 % and 0.11, respectively. According to other indices to assess irrigation regimes and fertilizer levels, the most suitable treatments regarding environmental aspect were 5-day irrigation regime and 45 kg N ha^-1.

【 授权许可】

Unknown