[A virtual water analysis for agricultural production and food security].
Water resource demand is increasing with the population growth and economic development. Water resource problem for agriculture and food security have become one of the global focal points because of water resource scarcity. The concept of virtual water is useful to analyze and impair this problem. In this paper, virtual water implication was described, and international study progress about it was briefly reviewed. Furthermore, China's agricultural water scarcity and food security were analyzed. According to the grain import prediction and agricultural production conditions of China, the virtual water equivalents of China in 2010 and 2020 were evaluated, which were 88 x 10(9) m3 in 2010 and 95 x 10(9) m3 in 2020. With the function of virtual water to agricultural water stress, virtual water strategy was suggested to relieve agricultural production pressure from water resource and meet growing food demand as well as to promote water resource sustainability in China.
Ke
Bing
B
Key Laboratory of System Ecology, Research Center for Eco-Environmental Sciences, CAS, Beijing 100085, China.
Liu
Wen-hua
WH
Duan
Guang-ming
GM
Yan
Yan
Y
Deng
Hong-bing
HB
Zhao
Jing-zhu
JZ
D000383:Agriculture; D003247:Conservation of Natural Resources; D018556:Crops, Agricultural; D005523:Food Supply; D014881:Water Supply