CropSyst model for wheat under deficit irrigation using sprinkler and drip irrigation in sandy soil

Journal of Water and Land Development

TahanyNoreldinWaterRequirementsandFieldIrrigationResearchDepartment,Soils,WaterandEnvironmentResearchInstitute,AgriculturalResearchCenter¹  MagdiT.AbdelhamidBotanyDepartment,NationalResearchCentre,33ElBehouthStreet,Dokki,12622,Giza,EgyptEmailOtherarticlesbythisauthor:DeGruyterOnlineGoogleScholar¹  SamihaOudaWaterRequirementsandFieldIrrigationResearchDepartment,Soils,WaterandEnvironmentResearchInstitute,AgriculturalResearchCenter³  9El-GamahStreetEl-Giza,EgyptOtherarticlesbythisauthor:DeGruyterOnlineGoogleScholar⁴  OussamaMounzerIrrigationDepartment,CEBAS-CSIC,CampusUniversitariodeEspinardo30100Espinardo,Apartado164,SpainOtherarticlesbythisauthor:DeGruyterOnlineGoogleScholar⁴ 

[1] 9 El-Gamah Street El-Giza, Egypt;Botany Department, National Research Centre, 33 El Behouth Street, Dokki, 12622, Giza, Egypt;Irrigation Department, CEBAS-CSIC, Campus Universitario de Espinardo 30100 Espinardo, Apartado 164, Spain;Water Requirements and Field Irrigation Research Department, Soils, Water and Environment Research Institute, Agricultural Research Center

关键词: Keywords: crop modeling;    CropSyst model;    deficit irrigation;    drip irrigation;    sprinkler irrigation;    Triticum aestivum;    water saving;   

DOI  :  10.1515/jwld-2015-0016

学科分类：农业科学（综合）

来源: Instytut Technologiczno-Przyrodniczego / Institute of Technology and Life Sciences

【 摘 要 】

CropSyst (Cropping Systems Simulation) is used as an analytic tool for studying irrigation water management to increase wheat productivity. Therefore, two field experiments were conducted to 1) calibrate CropSyst model for wheat grown under sprinkler and drip irrigation systems, 2) to use the simulation results to analyse the relationship between applied irrigation amount and the resulted yield and 3) to simulate the effect of saving irrigation water on wheat yield. Drip irrigation system in three treatments (100%, 75% and 50% of crop evapotranspiration – ETc) and under sprinkler irrigation system in five treatments (100%, 80%, 60%, 40%, and 20% of ETc) were imposed on these experiments. Results using CropSyst calibration revealed-that results of using CropSyst calibration revealed that the model was able to predict wheat grain and biological yield, with high degree of accuracy. Using 100% ETc under drip system resulted in very low water stress index (WSI = 0.008), whereas using 100% ETc sprinkler system resulted in WSI = 0.1, which proved that application of 100% ETc enough to ensure high yield. The rest of deficit irrigation treatments resulted in high yield losses. Simulation of application of 90% ETc not only reduced yield losses to either irrigation system, but also increased land and water productivity. Thus, it can be recommended to apply irrigation water to wheat equal to 90% ETc to save on the applied water and increase water productivity.

【 授权许可】

Unknown