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Title: Estimating Changes in the Green Water Productivity of Cropping Systems in Northern Shaanxi Province in China’s Loess Plateau
Author: Wang Jinping(王金平)1,3; Afton Clarke-Sather1,2; Jinzhu Ma3; Jiansheng Qu1,3
Source: WATER
Issued Date: 2018-09
Volume: 10, Issue:9, Pages:1198
Subject: 地球科学::地理学::自然地理学
Indexed Type: SCIE
English Abstract:

Abstract

: 
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.
Content Type: 期刊论文
URI: http://ir.las.ac.cn/handle/12502/9925
Appears in Collections:中国科学院兰州文献情报中心_战略情报研究部_期刊论文

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description.institution: 1.中科院兰州文献情报中心
2.明尼苏达大学德鲁斯分校
3.兰州大学

Recommended Citation:
Jinping Wang,Afton Clarke-Sather,Jinzhu Ma,et al. Estimating Changes in the Green Water Productivity of Cropping Systems in Northern Shaanxi Province in China’s Loess Plateau[J]. WATER,2018,10(9):1198.
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