Sensitivity of crop water productivity to the variation of agricultural and climatic factors: A study of Hetao irrigation district, China

Sun, Shikun; Zhang, ChengFeng; Li, Xiaolei; Zhou, Tianyang; Wang, Yubao; Wu, Pute; Cai, Huanjie

doi:10.1016/j.jclepro.2016.11.020

Cited by 43 publications

(21 citation statements)

References 20 publications

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“…When the wind speed becomes larger, the water vapor around the stomata of the crop will be blown away, the diffusion resistance inside and outside the blade will be reduced, and the crop transpiration will be enhanced. Therefore, the rise of air temperature and wind speed and the decline of relative humidity to a certain range will increase the water consumption of crops (Niu, Liu, Kang, & Zhang, ; Sun et al, ). Taking the period of 2026–2030 as an example, under the A2 scenario, the temperature and sunshine duration in the study area are higher, and the relative humidity and precipitation are lower, which results in the irrigation water demand under the A2 scenario being higher than that under the B2 scenario.…”

Section: Discussionmentioning

confidence: 99%

“…Through the adjustment of cropping patterns and the adoption of different times of planting, it is possible to reduce the agricultural water requirement and to optimize the irrigation schedule. Enhanced crop yield and water productivity can be achieved by adjusting to the use of better soil moisture conservation methods and better land managements (Bossio, Geheb, & Critchley, ; Sun et al, ).…”

Section: Discussionmentioning

confidence: 99%

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Impacts of future climate and agricultural land‐use changes on regional agricultural water use in a large irrigation district of northwest China

Sun

Zhou

et al. 2019

Land Degrad Dev

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Agricultural sectors are facing various environmental threats, such as land degradation and water resource depletion. Agricultural water use and cropping patterns are closely linked to each other, with both related to the regional climate. This study evaluated the impacts of future climate and agricultural land-use changes on agricultural water consumption in the Hetao Irrigation District (HID), China. The results show that owing to an increase in temperature and a decrease in precipitation, the future climate in the research area will become warmer and dryer, which will increase the water demand of crops. Future climate in the HID will lead to a 10.5% increase in total irrigation water demand under a scenario of high greenhouse gas emissions and a 6.9% increase under a scenario of low greenhouse gas emissions. Results of the grey prediction modeling indicate that the amount of water allocated to the agricultural sector will decrease, which will make it difficult to meet crop irrigation demands. The results of the gray model also show that the cropping pattern in the HID will vary over time, and the proportion of the area of cash crops will increase by 5.3% during the next decade. Regional agricultural water use can be reduced by adjusting the cropping pattern under irrigation water limitations. Meanwhile, the saved water can be used for soil desalination in cultivated land in the HID.Consequently, adjusting the cropping pattern is a nature-based solution by which to address climate change and guarantee the sustainable use of regional water and land resources.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Impacts of future climate and agricultural land‐use changes on regional agricultural water use in a large irrigation district of northwest China

Sun

Zhou

et al. 2019

Land Degrad Dev

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“…Crop water productivity (CWP) merupakan salah satu indikator penting yang berperan dalam optimasi penggunaan air pertanian (Xu et al, 2019). Memahami dampak variasi faktor iklim dan pertanian pada produktivitas air tanaman akan memberikan dasar teoritis untuk peningkatan produktivitas tanaman secara regional (Sun et al, 2017). Sektor pertanian menghadapi tantangan tentang bagaimana meningkatkan produksi dengan mengurangi penggunaan air dengan meningkatkan CWP (Kijne et al, 2003).…”

Section: Pendahuluanunclassified

“…Akan tetapi, studi tetang potensi perubahan iklim dan kelangkaan air terhadap produksi kakao masih sangat terbatas (Lahive et al, 2018). Selain itu, studi tentang CWP tanaman kakao saat ini masih banyak dilakukan pada tanaman pangan utama seperti padi, gandum dan jagung (Zwart and Bastiaanssen, 2004;Sun et al, 2017;Li et al, 2016). Oleh sebab itu, analisis CWP pada tanaman kakao akan menjadi salah satu tahapan awal dalam upaya peningkatan produktivitas tanaman kakao di DI Yogyakarta pada khususnya, dan Indonesia pada umumnya, di tengah kelangkaan sumber daya air dan perubahan iklim saat ini.…”

Section: Pendahuluanunclassified

TREN PERUBAHAN CROP WATER PRODUCTIVITY KAKAO (Theobroma cacao L. ) DI D.I. YOGYAKARTA

Suhartanto

Safitri

2020

JTEP-L

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The studies on the Crop Water Productivity (CWP) of cocoa to increase productivity in the midst of water scarcity and climate change are currently underdeveloped. Thus, this study aims to find out the trends in climate, productivity, crop water use and CWP of cocoa plantations. The methods included collecting climate and productivity data during 2014-2019, simulating crop water use with Cropwat 8.0 software and analysing the changing trends of CWP in cocoa plantations, DI Yogyakarta. The results indicated the changes in productivity of cocoa plantation ranged from 0,41 – 0,53 tons / ha. The Crop Water Usage (CWU) decreased from 11.107 m3 in 2014 to 8.482 m3 in 2019 under rainfed schenario. Subsequently, the trend of CWP tended to increase from 0,037 kgm-3 in 2014 to 0,059 kgm-3 in 2019. CWP of cocoa plantation increased when CWU decreased and productivity increased. CWP value illustrated that every 1 m3 of water used have produced 0,037 – 0,059 kg of dried cocoa beans. In terms of water use efficiency, this relatively small CWP value indicates that the level of water use by cocoa plants in DI Yogyakarta is inefficient that requires improvement in the future such as increasing land productivity and precision irrigation schemes for cocoa plantations. Keywords: Cacao (Theobroma cacao L.), crop water productivity, crop water use, D.I Yogyakarta

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“…Crop water productivity is a significant value for determining food-water relationships and for judging the sustainability of the system. Crop water productivity at the lysimeter scale is defined as the output of crop (kg ha −1 ) per unit of water consumed (mm) [38,39].…”

Section: Water Balance Crop and Irrigation Water Productivitymentioning

confidence: 99%

Water-Saving Potential of Subsurface Drip Irrigation For Winter Wheat

et al. 2019

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Groundwater plays a major role in agro-hydrological processes in the North China Plain (NCP). The NCP is facing a water deficit, due to a rapid decline in the water table because of the double cropping system. A two crop (maize and wheat) rotation is required to balance the food supply and demand, which leads to an imbalance between evapotranspiration (ET) and precipitation. Thus, there has been a decline of about 1.35 m yr−1 of groundwater (Luancheng Agroecosystem Experimental Station (LAES), NCP) during the last 10 years. Lysimeter experiments were conducted under different irrigation treatments (flood, surface drip, and subsurface drip) to account for ET in the selection of a suitable irrigation method. Subsurface drip irrigation reduced ET by 26% compared to flood irrigation, and 15% compared to surface drip irrigation, with significant grain yield and biomass formation due to decreased evaporation losses. Grain yield, yield components, and above ground biomass were similar in subsurface drip and flood irrigation. However, these biomass parameters were lower with surface drip irrigation. Furthermore, subsurface drip irrigation increased the crop water productivity (24.95%) and irrigation water productivity (19.59%) compared to flood irrigation. The subsurface irrigated plants showed an increase in net photosynthesis (~10%), higher intrinsic water use efficiency (~36%), lower transpiration rate (~22%), and saved 80 mm of water compared to flood irrigation. Our findings indicate that subsurface drip irrigation can be adopted in the NCP to increase water use efficiency, optimize grain yield, and minimize water loss in order to address scarcity.

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Sensitivity of crop water productivity to the variation of agricultural and climatic factors: A study of Hetao irrigation district, China

Cited by 43 publications

References 20 publications

Impacts of future climate and agricultural land‐use changes on regional agricultural water use in a large irrigation district of northwest China

Impacts of future climate and agricultural land‐use changes on regional agricultural water use in a large irrigation district of northwest China

TREN PERUBAHAN CROP WATER PRODUCTIVITY KAKAO (Theobroma cacao L. ) DI D.I. YOGYAKARTA

Water-Saving Potential of Subsurface Drip Irrigation For Winter Wheat

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