کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4479489 1316445 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Agricultural water productivity assessment for the Yellow River Basin
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
Agricultural water productivity assessment for the Yellow River Basin
چکیده انگلیسی

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.


► Water productivity (WP) of irrigated corn/soybean is lower than that
► of rainfed.
► WP varies spatially from upstream to downstream in the Yellow River basin.
► WP in term of crop production is not consistent with that in term of economic value.
► Water has stronger effects on WP than energy in the upper and middle basin.
► Energy matters more on WP than water in the lower basin.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agricultural Water Management - Volume 98, Issue 8, 30 May 2011, Pages 1297–1306
نویسندگان
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