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

• Autorzy: Noreldin T. , Ouda S. , Mounzer O. , Abdelhamid M. T.

Identyfikatory

DOI

10.1515/jwld-2015-0016

Warianty tytułu

PL

Model CropSyst do nawodnień pszenicy metodą deszczowania i metodą kroplową na glebach piaszczystych

• Języki publikacji: EN

Abstrakty

EN

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.

PL

CrosSyst (ang. Cropping Systems Simulation) wykorzystano jako narzędzie analityczne do zarządzania wodą do nawodnień w celu zwiększenia produktywności pszenicy. Przeprowadzono dwa eksperymenty terenowe w celu: 1) kalibracji modelu CropSyst w odniesieniu do pszenicy uprawianej w warunkach nawodnień deszczownianych i kroplowych, 2) zastosowania wyników symulacji do analizy zależności między wielkością nawodnień a plonem i 3) symulacji wpływu oszczędności wody użytej do nawodnień na plon pszenicy. W eksperymentach zastosowano trzy warianty nawodnień kroplowych (100%, 75% i 50% ewapotranspiracji – ETc) i pięć wariantów nawadniania deszczownianego (100%, 80%, 60%, 40% i 20% ETc). Wyniki kalibracji wykazały, że wartość RMSE wynosiła 0,03 i 0,14 t·ha^–1 odpowiednio dla ziarna i biomasy. Model umożliwiał symulację dobowego stresu wodnego w ciągu całego sezonu wegetacyjnego. W wariancie 90% ETc nie tylko stwierdzono zmniejszenie strat plonu w każdym z systemów nawodnień, ale także zwiększenie produktywności wody. Dlatego można zalecić stosowanie dawki 90% ETc w celu oszczędności wody i zwiększenia jej produktywności.

Słowa kluczowe

EN

crop modeling; CropSyst model; deficit irrigation; drip irrigation; sprinkler irrigation; Triticum aestivum; water saving

PL

model CropSyst; modelowanie plonów; nawodnienia deszczowniane; nawodnienia kroplowe; oszczędność wody; potrzeby nawodnień; Triticum aestivum

• Wydawca: Wydawnictwo ITP
• Czasopismo: Journal of Water and Land Development
• Rocznik: 2015
• Tom: no. 26
• Strony: 57--64
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Noreldin T.

• Water Requirements and Field Irrigation Research Department, Soils, Water and Environment Research Institute, Agricultural Research Center; 9 El-Gamah Street El-Giza, Egypt

autor

Ouda S.

• Water Requirements and Field Irrigation Research Department, Soils, Water and Environment Research Institute, Agricultural Research Center; 9 El-Gamah Street El-Giza, Egypt

autor

Mounzer O.

• Irrigation Department, CEBAS-CSIC, Campus Universitario de Espinardo 30100 Espinardo, Apartado 164, Spain

autor

Abdelhamid M. T.

• Botany Department, National Research Centre, 33 El Behouth Street, Dokki, 12622, Giza, Egypt

Bibliografia

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