| Cite this article: | 马晓蕾,宗子雯,张涵,等.宁夏农作物水、土足迹时空演变及其 耦合协调关系研究[J].灌溉排水学报,0,():-. |
| maxiaolei,Zongziwen,Zhanghan,et al.宁夏农作物水、土足迹时空演变及其 耦合协调关系研究[J].灌溉排水学报,0,():-. |
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| DOI： |
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| SPATIO-TEMPORAL EVOLUTION AND COUPLING COORDINATION RESEARCH OF CROPS WATER AND LAND FOOTPRINTS IN NINGXIA |
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maxiaolei1, Zongziwen2, Zhanghan2, Zhaoyuwei2
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1.Huaiyin Normal University;2.Anyang Normal University
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| Abstract: |
| 【Objective】 Ningxia is short of water resources, with scarce precipitation and uneven distribution of water resources in time and space.Through the study of the water and soil footprint and spatial coupling relationship of major crops in Ningxia Hui Autonomous Region from 2011 to 2020, this paper provides scientific basis for the optimal utilization of agricultural water resources, so as to provide countermeasures and suggestions for alleviating the water shortage problem in Ningxia. 【Methods】 Water footprint, land footprint, and coupling degree based model were used to analyze the spatial-temporal evolution of water footprint and land footprint of major crops in Ningxia, as well as the spatial coupling relationship between water and soil. 【Results】 (1) The 10A average comprehensive water footprint (m3/kg) of major crops in Ningxia was ranked as Shizuishan > Yinchuan > Wuzhong > Zhongwei > Guyuan. The water footprint of soybean production was the highest, while that of corn production was the lowest among all prefecture-level cities. (2) The proportion of blue water footprint of crops was much higher than that of green water footprint, and soybean was the crop with the highest blue and green water footprint. (3) The water footprint of crop production did not change significantly in Guyuan City, while the water footprint of other prefecture-level cities continued to decrease, among which Yinchuan City decreased at the fastest rate. (4) In the spatial change of agricultural land footprint, Shizuishan City and Guyuan City showed an overall upward trend, while other prefecture-level cities showed a downward trend, and Yinchuan City showed the fastest downward trend. (5) From the perspective of the water-soil coupling degree of crops, the water-soil footprint coupling degree of wheat and soybean changed greatly, while the water-soil footprint coupling degree of other crops almost remained unchanged.From the perspective of prefecture-level cities, the water-soil coupling degree of crops in Guyuan city was always at a low level in 2010, 2015 and 2020, and the water-soil footprint coupling degree of crops in other prefecture-level cities changed significantly. 【Conclusion】 The overall comprehensive water footprint of crops in Shizuishan City is high, so we should pay attention to optimizing crop planting structure and strengthening the conservation and utilization of agricultural water resources.In addition, the spatial coupling degree of crop water-soil footprint in Ningxia should be further improved to optimize the spatial allocation of water and soil resources. |
| Key words: Ningxia; green water footprint; blue water footprint; grey water footprint; land footprint; coupling coordination degree |
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