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Modeling the combined impacts of deficit irrigation, rising temperature and compost application on wheat yield and water productivity

文献类型： 外文期刊

作者： Ding, Zheli 1 ; Ali, Esmat F. 2 ; Elmahdy, Ahmed M. 4 ; Ragab, Khaled E. 5 ; Seleiman, Mahmoud F. 6 ; Kheir, Ahmed 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci CATAS, Haikou Expt Stn, Haikou, Hainan, Peoples R China

2.Taif Univ, Dept Biol, Coll Sci, POB 11099, At Taif 21944, Saudi Arabia

3.Assiut Univ, Fac Agr, Hort Floriculture Dept, Assiut, Egypt

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

5.Agr Res Ctr, Field Crops Res Inst, Wheat Res Dept, Giza, Egypt

6.King Saud Univ, Coll Food & Agr Sci, Plant Prod Dept, POB 2460, Riyadh 11451, Saudi Arabia

7.Menoufia Univ, Fac Agr, Dept Crop Sci, Shibin Al Kawm 32514, Egypt

关键词： Evapotranspiration; Climate change; Greenhouse gas emissions; Priestley-Taylor; Penman-Monteith

期刊名称：AGRICULTURAL WATER MANAGEMENT （ 影响因子：4.516； 五年影响因子：5.12 ）

ISSN： 0378-3774

年卷期： 2021 年 244 卷

页码：

收录情况： SCI

摘要： Limited water resources and climate change in arid and semi-arid regions have negative impacts on food and water security. Management of irrigation and compost may be used to tackle this issue. Crop models are the powerful tools that could predict grain yield (GY) and water productivity (WP) under a broad range of irrigation, compost and temperature interactions. In addition, modeling irrigation management requires the selection of the most suitable evapotranspiration (ET) approach to achieve robust simulations. To achieve this goal, two crop models in Decision Support System for Agrotechnology Transfer (DSSAT) (i.e. CERES-Wheat and N-Wheat), were calibrated and evaluated using a field dataset of three growing seasons in a high-temperate region in Egypt (Luxor). Then, the models were applied to explore GY and WP across a wide range of irrigation (11 options) and compost (8 rates) interactions using two ET routines such as Priestley-Taylor (PT) and FAO 56 Penman-Monteith (PM). The models were also used to predict (GY) and (WP) within the same range of irrigation and compost interactions at higher temperatures (i.e. +1,2,3 and 4) compared to the baseline outputs (1981-2010). Simulation results showed that, deficit irrigation up to 80% and 85% from soil available water achieved the highest values of GY (7.5 t ha(-1)) and WP (18.4 kg ha(-1) mm(-1)) respectively, provided that using higher rate of compost (12 t ha(-1)). Rising temperature up to 4 degrees C decreased GY and WP by 17.2% and 7.4% respectively relative to the baseline without any benefits from compost. Compost technology does not help offset the negative impacts of temperature, but increased yield reduction and greenhouse gas emissions (GHG). Higher compost rates may be used to mitigate the effect of deficit irrigation on wheat yield and water productivity, but not compatible with mitigation of climate change in arid and semi-arid regions.

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