Modeling the water-satisfied degree for production of the main food crops in China

The Science of the Total Environment
Guangming YuHongzhi Wang

Abstract

Water resources are one of the important factors that influence regional crop production and the food security of humans. Most traditional models of crop water demand analysis are built on the basis of a certain crop or macroscopic analysis, which neglect regional crop allocation and the difference of water demand in different crop growing periods. In this paper, a new assessing model, the satisfied degree of crop water requirement, is developed to assess the impacts of water resources on production of six main food crops in China. The six main food crops are spring wheat, winter wheat, corn, early season rice, middle-season rice and late rice. The results show that: (1) there are serious risks of water shortage in China, even in south China with its abundant precipitation; (2) the satisfied degree of crop water demand represents great temporal-spatial changes. On spatial distribution the risks are high in major bases of food production due to influences of cropping system and crop-combinations. Northwest China is a special interesting case. In seasonal fluctuation water shortage is severe in March and September. These risks seriously restrict food production in China. The results also show that the strategic measures of water ...Continue Reading

References

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Sep 28, 2015·The Science of the Total Environment·Jan RiedigerWinfried Schröder

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Citations

Jan 7, 2021·Environmental Science and Pollution Research International·Shaghayegh Gorji, Ali Gorji

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