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| DOI：10.13522/j.cnki.ggps.2020155 |
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| Water-saving Irrigation and Utilization Efficiency of Water and Fertilizer in Hetao Irrigation District of Inner Mongolia: Prospect for Future Research |
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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, China2. 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: |
| Water resource scarcity, soil salinization and low use efficiency of water and fertilizer are a hat-trick of challenges facing development of sustainable agriculture in Hetao irrigation district of Inner Mongolia. With water-saving projects being constructed and the restriction on water use by the Yellow River Conservancy Commission implemented, the amount of water available for diversion from the Yellow river to the district has been in decline continuously over the past few decades. As such, water resource allocation, irrigation and fertilization method and amount, as well as ecological environment in the district have all changed markedly. Resolving the problems facing modernly reconstructing the irrigation district needs breaking-ground research in many areas. We summarize in this paper the research results in this district over the past two decades in areas including agricultural water consumption, theory in efficient water-saving irrigation, water-saving irrigation system, control and mitigation of soil salinization, effect of water-saving on crop quality, impact of water-nitrogen coupling, the mechanisms involved in organic-inorganic fertilizer coupling in maintaining and improving crop productivity in the salinized irrigation area. We conclude that, to maintain ecological security and sustainability of the irrigation district, research in areas including efficient water-saving irrigation, improving irrigation systems and crop quality, increasing soil carbon sequestration and nitrogen cycling, nitrogen mineralization and application of modern technology should be strengthened. |
| Key words: Hetao irrigation district; water saving and salt control; efficient utilization of water and fertilizer; crop quality; ecological environment |
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