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[1]CAO Yongqiang,LI Weijia,ZHU Mingming.Temporal and Spatial Characteristics of Water Deficit of Winter Wheat and Cotton in Hebei Province[J].Research of Soil and Water Conservation,2018,25(06):348-356,364.

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Temporal and Spatial Characteristics of Water Deficit of Winter Wheat and Cotton in Hebei Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 06 Page number: 348-356,364 Column: Public date: 2018-10-26

Title:: Temporal and Spatial Characteristics of Water Deficit of Winter Wheat and Cotton in Hebei Province

Author(s):: CAO Yongqiang, LI Weijia, ZHU Mingming; School of Urban Planning and Environmental Science, Liaoning Normal University, Dalian, Liaoning 116029, China

Keywords:: water shortage; moisture profit and loss index; winter wheat; cotton; Hebei Province

CLC:: S512.1⁺1;S56;S274

DOI:: -

Abstract:: Based on the daily meteorological data of 13 national standard meteorological stations in Hebei Province in recent 60 years (1955—2014), the water deficit and moisture gain and loss index of winter wheat and cotton in Hebei Province were calculated respectively by using the calculation method of crop water requirement recommended by the United Nations Food and Agriculture Organization (FAO) and Man-Kendall (M-K) method, Morlet wavelet analysis method and ordinary Kriging interpolation method. The results showed that: (1) in the recent 60 years, the water deficit of winter wheat in the whole growth period in Hebei Province showed the decreasing trend with the rate of -3.74 mm/(d·decade), and the water deficit of cotton showed the decreasing trend with the rate of -22.88 mm/(d·decade). The changes of water deficit in both crops were about 40-year main period and 25-year sub-period. The maximum water deficit in winter wheat appeared in Nangong during the whole growth period, and the minimum value of water deficit appeared in Qinhuangdao. The maximum cotton water deficit occurred in Huanghua, had the least water deficit was found in Zunhua; (2) the water deficits of the two crops reached the maximum in the fast growing period. Winter wheat had the least water deficit during the freeze-thaw period, while cotton had the least water deficit during the initial growing season. The water deficit index of winter wheat reached the maximum value at the initial growth stage. Water deficit of cotton reached the maximum at the middle stage of growth, and the difference was little among different regions; (3) the spatial distribution of water shortage in winter wheat and cotton in Hebei Province is uneven. The water deficit indices of two crops were opposite, and the distribution characteristics gradually increase from center to periphery. The results of this study are of practical significance to optimize irrigation water resource allocation and improve the irrigation efficiency of agricultural irrigation water resources.

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