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| DOI：10.13522/j.cnki.ggps.2020156 |
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| Soil Water and Salt Movement and Soil Salinization Control in Hetao Irrigation District: Current State and Future Prospect |
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SHI Haibin, YANG Shuqing, LI Ruiping, LI Xianyue, LI Weiping, YAN Jianwen, MIAO Qingfeng, LI Zhen
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1.College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China; 2. Research and Development of Efficient Water-saving Technology and Equipment and Research Engineering Center of Soil and Water Environment Effect in Arid Area of Inner Mongolia Autonomous Region, Hohhot 010018, China
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| Abstract: |
| Hetao Irrigation District in Inner Mongolia is an important grain and oil production base in China. With its quota of Yellow River water falling continuously over the past decades, there have been substantial changes in land use, water and salt distribution and ecological environment in the district. Restructuring agricultural production in the region is challenging amid the reduced quota of water. Improving our understanding of the mechanisms underlying water and solute movement is hence critical. We reviewed in this paper the research results achieved over the past two decades, including spatiotemporal distribution and transport of soil water and salt, response of crops to brackish water irrigation, soil structure alteration in the saline alkali soil, soil water and salt movement induced by freezing-thawing and the autumn irrigation, and outlined the future prospect for the district. Based on previous experiences and work, we propose that future research on water and salt dynamics in the region should take its ecological security as a goal and continue to improve applications of modern technologies. |
| Key words: Hetao irrigation district; soil salinization control; saline alkali soil improvement; ecological environment; soil water and salt transport |
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