| Cite this article: | 高海燕,李王成,李晨,等.宁夏主要农作物生产水足迹及其变化趋势研究[J].灌溉排水学报,2020,(3):-. |
| Gao Haiyan,Li Wangcheng,Li Chen,et al.宁夏主要农作物生产水足迹及其变化趋势研究[J].灌溉排水学报,2020,(3):-. |
|
| |
|
|
| This article has been：Browse 1919Times Download 0Times |
|
|
|
| DOI： |
|
| Study on Water Footprint and Its Changing Trend of Main Crop Production in Ningxia |
|
Gao Haiyan, Li Wangcheng, Li Chen, Dong Yaping, Hao Lu, Ma Ji’an, Liu Zixi, Li Yukun
|
|
Department of Civil and Hydraulic Engineering,Ningxia University
|
| Abstract: |
| 【Background】Against the background of global water shortage, scholars from various countries have conducted extensive and in-depth research on how to alleviate the pressure on water resources and improve the efficiency of water resources utilization. So far, water scarcity is still a hot issue worldwide. Agricultural production accounts for the largest proportion of the world's total annual water consumption. China is a large agricultural country and at the same time a country with extremely scarce water resources. The growth of crops consumes a lot of water resources. Some data show that in recent years, China’s agricultural production has reached 60% of its total water consumption. Therefore, water shortage has become an important factor restricting China’s agricultural development, so how to use agricultural water resources efficiently have become an issue that cannot be ignored in China's agricultural development today. Water footprint theory, as one of the hot spots in the field of water resources management, has made great progress in both theory and application after nearly two decades of development. Ningxia is located in northwestern China. It is arid and lacking water, and the use of water resources is mainly for agricultural use. The current research on water resources in Ningxia mostly focuses on the evaluation and analysis of the overall water footprint and water resources in Ningxia. In recent years, there are few studies on the crop water footprint and its changing trend among different crops, between different regions and between different years.【Objective】Discussing the water footprint of crop production and its changing trend in the past ten years to provide theoretical basis for adjusting agricultural water structure to improve water shortage in Ningxia .【Method】Based on the theory of water footprint, this paper uses meteorological and agricultural data to quantify the production water footprint of Ningxia's main crops in 2008-2017, and combines meteorological factors with crop yields to analyze its spatial and temporal distribution and trend. 【Result】1) The production water footprint of each crop in Ningxia region has a decreasing trend in total during the ten-year study period. The average integrated production water footprint of soybean is the largest, 4.51m3/kg, and the average production water footprint of wheat is the smallest, 0.91m3 /kg;2) The highest proportion of blue-green water footprint of each crop is rice, which is 5:1, and the lowest is soybean, which is 1.4:1;3) During the ten-year study period,the water footprint of comprehensive crop production in vairous regions was ranked as follows: WuZhong (15.58m3/kg) > Zhongwei (13.71m3/kg) > Shizuishan (12.77m3/kg) >Yinchuan(9.46m3/kg) >Guyuan(8.21m3/kg);4) The proportion of blue and green water footprint in all areas increases successively from south to north, with a minimum of 1.2:1 in Guyuan and a maximum of 5:1 in Shizuishan.【Conclusion】In Ningxia, where water resources are scarce, it is necessary to appropriately adjust the planting structure and irrigation mode according to the water consumption rules of each crop to reduce the water use in agriculture to alleviate the shortage of water resources. |
| Key words: Production Water footprint;Green water footprint;Blue water footprint;main crops;Ningxia |
|
|
|
|
|
|
