气候变化领域集成服务门户(CCPortal): Estimating Changes in the Green Water Productivity of Cropping Systems in Northern Shaanxi Province in China's Loess Plateau

CCPortal

DOI	10.3390/w10091198
	Estimating Changes in the Green Water Productivity of Cropping Systems in Northern Shaanxi Province in China's Loess Plateau
	Wang, Jinping; Ma, Jinzhu; Clarke-Sather, Afton; Qu, Jiansheng
发表日期	2018
EISSN	2073-4441
卷号	10 期号:9
英文摘要	Water shortages limit agricultural production in the world's arid and semi-arid regions. The Northern region of China's Shaanxi Province, in the Loess Plateau, is a good example. Raising the water productivity of rainfed grain production in this region is essential to increase food production and reduce poverty, thereby improving food security. To support efforts to increase crop water productivity (CWP), we accounted for limitations of most existing studies (experimental studies of specific crops or hydrological modeling approaches) by using actual field data derived from statistical reports of cropping patterns. We estimated the CWPs of nine primary crops grown in four counties in Northern Shaanxi from 1994 to 2008 by combining statistics on the cultivated area and yields with detailed estimates of evapotranspiration based on daily meteorological data. We further calculated both the caloric CWP of water (CCWP) and the CWP of productive water (i.e., water used for transpiration). We found that regional CWP averaged 6.333 kg mm(-1) ha(-1), the CCWP was 17,683.81 cal mm(-1) ha(-1), the CWP of productive green water was 8.837 kg mm(-1) ha(-1), and the CCWP of productive green water was 24,769.07 cal mm(-1) ha(-1). Corn, sorghum, and buckwheat had the highest CWP, and although potatoes had the largest planted area and relatively high CWP, they had a low CCWP.
关键词	USE EFFICIENCY MANAGEMENT WHEAT YIELD IRRIGATION MAIZE MODEL SOIL
英文关键词	agricultural production; food security; water-use efficiency; crop water productivity; evapotranspiration
语种	英语
WOS研究方向	Water Resources
来源期刊	WATER
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/134222
作者单位	Lanzhou Univ, Coll Earth & Environm Sci, 222 South Tianshui Rd, Lanzhou 730000, Gansu, Peoples R China.
推荐引用方式 GB/T 7714	Wang, Jinping,Ma, Jinzhu,Clarke-Sather, Afton,et al. Estimating Changes in the Green Water Productivity of Cropping Systems in Northern Shaanxi Province in China's Loess Plateau[J]. 中国科学院西北生态环境资源研究院,2018,10(9).
APA	Wang, Jinping,Ma, Jinzhu,Clarke-Sather, Afton,&Qu, Jiansheng.(2018).Estimating Changes in the Green Water Productivity of Cropping Systems in Northern Shaanxi Province in China's Loess Plateau.WATER,10(9).
MLA	Wang, Jinping,et al."Estimating Changes in the Green Water Productivity of Cropping Systems in Northern Shaanxi Province in China's Loess Plateau".WATER 10.9(2018).