[1]CHEN Wei,CHEN Li,SUN Congjian,et al.Spatial Distribution of Water Requirements for Different Crops in North Loess Plateau[J].Research of Soil and Water Conservation,2020,27(05):166-171,176.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 05
Page number:
166-171,176
Column:
目次
Public date:
2020-08-20
- Title:
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Spatial Distribution of Water Requirements for Different Crops in North Loess Plateau
- Author(s):
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CHEN Wei, CHEN Li, SUN Congjian, ZHENG Zhenjing, LI Xiaoming
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(School of Geographical Sciences, Shanxi Normal University, Linfen, Shanxi 041000, China)
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- Keywords:
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crop water demand; spatial distribution; P-M mode; water deficit index
- CLC:
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S271
- DOI:
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- Abstract:
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Based on the P-M(penman-monteith)crop water demand model, daily meteorological data from 25 meteorological stations in Shanxi Province were used to calculate the crop water demands, irrigation water demands and water deficit indices of winter wheat(Triticum aestivum L.), maize( Zea mays L.), millet(Setaria italica)and sorghum [Sorghum bicolor(L.)Moench] in the east of the Loess Plateau. The results showed that:(1)the water requirements of the four crops were between 293.39 mm and 656.77 mm; the average annual water requirement of millet was 39.99% less than that of winter wheat, 30.58% less than that of corn, 14.01% less than that of winter wheat, and 0.53% less than that of corn;(2)the irrigation water demand was between 0 and 289.69 mm, and the average irrigation water demands of crops were in the order of winter wheat, corn, sorghum and millet from most to least;(3)the water deficit indices of main crops were between -0.23 and 0.48, and millet was the only crop with water surplus; the water deficit index was the smallest in the south of the region, the water deficit index was serious in the middle of winter wheat region, and the water deficit was most serious in the north of maize, millet and sorghum region. The study on the spatial distribution of water demands of main crops has the important guiding significance for determining the irrigation water consumptions of crops, understanding the degree of water deficit and rational planting structure.