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Minimizing trade-offs between wheat yield and resource-use efficiency in the Nile Delta - A multi-model analysis

文献类型： 外文期刊

作者： Kheir, Ahmed M. S. 1 ; Hoogenboom, Gerrit 3 ; Ammar, Khalil A. 1 ; Ahmed, Mukhtar 5 ; Feike, Til 6 ; Elnashar, Abdelrazek 7 ; Liu, Bing 9 ; Ding, Zheli 10 ; Asseng, Senthold 11 ;

作者机构： 1.Int Ctr Biosaline Agr, Directorate Programs, Dubai 14660, U Arab Emirates

2.Soils Water & Environm Res Inst, Agr Res Ctr, Giza 12112, Egypt

3.Univ Florida, Dept Agr & Biol Engn, Gainesville, FL USA

4.Univ Florida, Food Syst Inst, Gainesville, FL USA

5.PMAS Arid Agr Univ, Dept Agron, Rawalpindi 46300, Pakistan

6.Julius Kuehn Inst JKI, Inst Strategies & Technol Assessment, Fed Res Ctr Cultivated Plants, D-14532 Kleinmachnow, Germany

7.Cairo Univ, Fac African Postgrad Studies, Dept Nat Resources, Giza 12613, Egypt

8.Chinese Acad Sci, Aerosp Informat Res Inst, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China

9.Nanjing Agr Univ, Natl Engn & Technol Ctr Informat Agr, Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Key Lab Crop Syst Anal & Decis Making,Jiangsu Key, Nanjing, Peoples R China

10.Chinese Acad Trop Agr Sci CATAS, Haikou Expt Stn, Haikou, Peoples R China

11.Tech Univ Munich, Dept Life Sci Engn, Digital Agr, D-85354 Freising Weihenstephan, Germany

关键词： Wheat simulation model; DSSAT; Water use efficiency; Radiation use efficiency; Deficit irrigation; Food security; Long-term simulation

期刊名称：FIELD CROPS RESEARCH （ 影响因子：6.145； 五年影响因子：7.234 ）

ISSN： 0378-4290

年卷期： 2022 年 287 卷

页码：

收录情况： SCI

摘要： Current wheat crop management practices in the Nile Delta of Egypt are unsustainable due to the overuse of limited water resources. Therefore, the aim of this study was to investigate opportunities to maximize wheat yield and resource efficiency including irrigation water use efficiency (WUE), nitrogen use efficiency (NUE), and solar radiation use efficiency (RUE). Three wheat simulation models (CERES, CROPSIM and NWheat) of the Decision Support System for Agrotechnology Transfer (DSSAT) were calibrated and evaluated for the modern spring wheat cultivar Sakha95 across field experiments with sowing date and irrigation treatments over three successive growing seasons. All three crop models showed a satisfactory agreement between simulated and measured grain yield and water use under both limited and unlimited conditions. The three crop models were then used to simulate yield, WUE, NUE and RUE under various N and irrigation treatments for 10 sites representing the wheat growing area of the Nile Delta using historical weather data from 1981 to 2010. Increasing nitrogen fertilizer to 300 kg N ha-1 improved grain yield across the Nile Delta (to 9800 kg ha-1), WUE (to 30.6 kg ha-1 mm-1), and RUE (to 0.89 g MJ-1), but with diminishing returns for each kilogram of fertilizer applied and, hence, a decreasing NUE (to 28.9 kg grain yield kg N-1). Irrigation at 80% plant available water depletion was the optimal treatment, which minimized water use with a slight decline in grain yield (7992 kg ha-1), WUE (28.0 kg ha-1), and RUE (0.67 g MJ-1). For food security and optimal utilization of available solar radiation, the highest yield seems most desirable. However, with limited water and N fertilizer resources, a high WUE and NUE could be more critical for a sustainable wheat production in the Nile Delta and other irrigated arid wheat growing regions.

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