TY - JOUR
T1 - Agricultural water productivity assessment for the Yellow River Basin
AU - Cai, Ximing
AU - Yang, Yi Chen E.
AU - Ringler, Claudia
AU - Zhao, Jianshi
AU - You, Liangzhi
N1 - Funding Information:
The study was supported by the Consultative Group on International Agricultural Research (CGIAR), Challenge Program on Water and Food (CPWF). The authors are grateful for the three anonymous reviewers and the editorial help from Dr. Dennis Wichelns, Editor of the Journal.
Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/5/30
Y1 - 2011/5/30
N2 - Agricultural water productivity (WP) has been recognized as an important indicator of agricultural water management. This study assesses the WP for irrigated (WPI) and rainfed (WPR) crops in the Yellow River Basin (YRB) in China. WPI and WPR are calculated for major crops (corn, wheat, rice, and soybean) using experimental, statistical and empirically estimated data. The spatial variability of WPI and WRR is analyzed with regard to water and energy factors. Results show that although irrigated corn and soybean yields are significantly higher than rainfed yields in different regions of the YRB, WPI is slightly lower than WPR for these two crops. This can be explained by the seasonal coincidence of precipitation and solar energy patterns in the YRB. However, as expected, irrigation stabilizes crop production per unit of water consumption over space. WPI and WPR vary spatially from upstream to downstream in the YRB as a result of varying climate and water supply conditions. The water factor has stronger effects on both crop yield and WP than the energy factor in the upper and middle basin, whereas energy matters more in the lower basin. Moreover, WP in terms of crop yield is compared to that in terms of agricultural GDP and the results are not consistent. This paper contributes to the WP studies by a basin context, a comparison between WPI and WPR, a comparison of WP in terms of crop yield and economic value, and insights on the water and energy factors on WP. Moreover, policy implications based on the WP analysis are provided.
AB - Agricultural water productivity (WP) has been recognized as an important indicator of agricultural water management. This study assesses the WP for irrigated (WPI) and rainfed (WPR) crops in the Yellow River Basin (YRB) in China. WPI and WPR are calculated for major crops (corn, wheat, rice, and soybean) using experimental, statistical and empirically estimated data. The spatial variability of WPI and WRR is analyzed with regard to water and energy factors. Results show that although irrigated corn and soybean yields are significantly higher than rainfed yields in different regions of the YRB, WPI is slightly lower than WPR for these two crops. This can be explained by the seasonal coincidence of precipitation and solar energy patterns in the YRB. However, as expected, irrigation stabilizes crop production per unit of water consumption over space. WPI and WPR vary spatially from upstream to downstream in the YRB as a result of varying climate and water supply conditions. The water factor has stronger effects on both crop yield and WP than the energy factor in the upper and middle basin, whereas energy matters more in the lower basin. Moreover, WP in terms of crop yield is compared to that in terms of agricultural GDP and the results are not consistent. This paper contributes to the WP studies by a basin context, a comparison between WPI and WPR, a comparison of WP in terms of crop yield and economic value, and insights on the water and energy factors on WP. Moreover, policy implications based on the WP analysis are provided.
KW - Economic value of water
KW - Irrigation
KW - Rainfed crops
KW - Water resources management
KW - Water use efficiency
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U2 - 10.1016/j.agwat.2011.03.010
DO - 10.1016/j.agwat.2011.03.010
M3 - Article
AN - SCOPUS:79956312430
VL - 98
SP - 1297
EP - 1306
JO - Agricultural Water Management
JF - Agricultural Water Management
SN - 0378-3774
IS - 8
ER -