Does a trade-off between yield and efficiency reduce water and nitrogen inputs of winter wheat in the North China Plain?

Bai, Huiqing; Wang, Jing; Fang, Qiannan; Huang, Bing

doi:10.1016/j.agwat.2020.106095

Cited by 18 publications

(11 citation statements)

References 56 publications

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“…Past work has shown that APSIM reliably simulates manifold cropping systems, including paddy rice, wheat, chickpea, canola, cotton, maize, millet, mung bean, sorghum, and sunflower [7,[44][45][46][47]. The APSIM-Wheat model [48] has been successfully calibrated and validated in many parts of the world, including Australia [20,33,[49][50][51][52][53][54][55], China [40,[56][57][58][59][60], Ethiopia [61], Iran [62], and India [63]. APSIM-Wheat v7.10-r4158 was used to conduct all simulations in this study.…”

Section: Cropping System Modelling With the Agricultural Productions ...mentioning

confidence: 99%

The Impacts of Climate Change on the Irrigation Water Demand, Grain Yield, and Biomass Yield of Wheat Crop in Nepal

Kaini

Harrison

Gardner

et al. 2022

Water

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The Nepalese Sunsari Morang Irrigation district is the lifeblood of millions of people in the Koshi River basin. Despite its fundamental importance to food security, little is known about the impacts of climate change on future irrigation demand and grain yields in this region. Here, we examined the impacts of climate change on the irrigation demand and grain yield of wheat crop. Climate change was simulated using Representative Concentration Pathways (RCPs) of 4.5 and 8.5 for three time horizons (2016–2045, 2036–2065, and 2071–2100) in the Agricultural Production Systems Simulator (APSIM). For the field data’s measured period (2018–2020), we showed that farmers applied only 25% of the irrigation water required to achieve the maximum potential grain yield. Actual yields were less than 50% of the potential yields. Projected irrigation water demand is likely to increase for RCP4.5 (3%) but likely to decrease under RCP8.5 (8%) due to the truncated crop duration and lower maturity biomass by the end of the 21st century. However, simulated yields declined by 20%, suggesting that even irrigation will not be enough to mitigate the severe and detrimental effects of climate change on crop production. While our results herald positive implications for irrigation demand in the region, the implications for regional food security may be dire.

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Section: Cropping System Modelling With the Agricultural Productions ...mentioning

confidence: 99%

The Impacts of Climate Change on the Irrigation Water Demand, Grain Yield, and Biomass Yield of Wheat Crop in Nepal

Kaini

Harrison

Gardner

et al. 2022

Water

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“…However, it is hardly to obtain reliable spatial distribution of surveyed yield for analysis or validation up to now. Accordingly, crop yield used in many papers are generally simulated using different models (Ai et al, 2020;Bai et al, 2020a;Jin et al, 2018;Wang et al, 2020b). As the complex processes of dry matter partitioning and yield formation for different crops are difficult to model, GPP could be a better indicator of crop carbon gain than NPP or grain yield.…”

Section: Limitations On Cropland Wp Estimation In Chinamentioning

confidence: 99%

“…Chen and Zhang, 2019;Fernández et al, 2020;Ma et al, 2021;Molden et al, 2003;Xue et al, 2021). Due to differences in crop varieties (genotypes), cropping patterns and systems, management practices and environment conditions, cropland WP values are generally variable at different spatial scales of crop-field-region-globe, and different temporal scales of day-month-season-year (Bai et al, 2020a(Bai et al, , 2020bFarooq et al, 2019;Hwang et al, 2020;Kang et al, 2021;Lu et al, 2016;Mbava et al, 2020;Wang et al, 2018). Numerous studies have investigated cropland WP (or WUE) for different crop types and varieties (Hou et al, 2020;Si et al, 2020;Wang et al, 2020a,c;Zhang et al, 2019), for example, Mbava et al (2020) revealed that summer crops had higher WUE than winter crops based on a global meta-analysis, and maize and sorghum were the most water use efficient crops.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal variations of water productivity for cropland and driving factors over China during 2001–2015

Yang

Zhang

Wang

et al. 2022

Agricultural Water Management

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“…In the last decades, people have been paying attention to the positive effects of sustainable management practices on crop growth and development (Fig. 1) and advocated several sustainable management practices to ensure food security and improve WUE (Bai et al 2020;Liu et al 2021;Lu et al 2021;Struik and Kuyper 2017). Water-saving irrigation practices have been widely acknowledged to increase crop yield and improve the crop WUE (Sun et al 2019a;Yu et al 2020Yu et al , 2021.…”

Section: Introductionmentioning

confidence: 99%

Sustainable management practices to improve the water use efficiency of winter wheat in the North China Plain: a meta-analysis

Liu

Lin

et al. 2022

Agron. Sustain. Dev.

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Water shortage is a serious threat to agriculture production in the North China Plain. Sustainable management practices can improve the water use efficiency of winter wheat, but currently no academic consensus has been reached. Therefore, we performed a meta-analysis that included 2194 observations from 209 articles to assess the water use efficiency of wheat in this area. The groundwater provides for 34%-37% of wheat evapotranspiration, which increases the decline of groundwater levels. The management of wheat irrigation appears to be the key process in improving agricultural water use efficiency. We observed from regression analyses that the factors such as climate, soil, and management significantly affect the water use efficiency of wheat (p < 0.05). The data showed that nitrogen input and irrigation significantly increased wheat yields (p < 0.05), but irrigation did not significantly improve the water use efficiency compared to rain-fed wheat. The optimal water use efficiency was obtained when the irrigation amount was 80-160 mm, or irrigation was applied twice, or the seasonal irrigation amount plus precipitation was ≤ 240 mm. In contrast, a nitrogen input significantly increased evapotranspiration and water use efficiency. The water use efficiency improvement was especially prominent when the nitrogen application rate was 220-250 kg•ha −1 . Moreover, subsoiling and straw return should be recommended for increasing yield, reducing evapotranspiration, and improving water use efficiency. These practices can ultimately save over 240 mm of water and 75 kg•ha −1 of nitrogen, which contributes to a sustainable agricultural development. Here, we demonstrate for the first time the impact of management practices on crop water use efficiency at a regional scale and propose a sustainable agricultural development scheme.

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Does a trade-off between yield and efficiency reduce water and nitrogen inputs of winter wheat in the North China Plain?

Cited by 18 publications

References 56 publications

The Impacts of Climate Change on the Irrigation Water Demand, Grain Yield, and Biomass Yield of Wheat Crop in Nepal

The Impacts of Climate Change on the Irrigation Water Demand, Grain Yield, and Biomass Yield of Wheat Crop in Nepal

Spatiotemporal variations of water productivity for cropland and driving factors over China during 2001–2015

Sustainable management practices to improve the water use efficiency of winter wheat in the North China Plain: a meta-analysis

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