| 摘要: |
| 【目的】探究不同地下水埋深和灌水量对土壤水与地下水交换的影响，提高灌溉水利用效率。【方法】在河套灌区开展了不同地下水埋深与灌水量对土壤含水率、地下水埋深及土壤水与地下水交换影响的田间试验，分析变化地下水埋深与灌水量对土壤水与地下水交换的影响。【结果】不同灌水量下，灌水前后0～60 cm土壤含水率变化明显，灌水主要补充耕作层，生育期第3次灌水入渗量约占灌水总量25%，灌水量越大，土壤水对地下水入渗补给量越大。地下水埋深随灌水量增加而显著减小（P < 0.05），地下水补给量与灌溉量的比值依次为L1处理＞L2处理＞L3处理＞L4处理＞L5处理＞L6处理＞L7处理＞L8处理＞L9处理。【结论】在河套灌区年均地下水埋深为1.8 m的区域，生育期单次灌水量110 mm，秋浇300 mm，可显著减少灌溉水下渗，以达到充分利用潜水蒸发，提高水资源利用效率，实现节水增产的目的。 |
| 关键词: 灌水量；地下水埋深；交换；入渗量 |
| DOI： |
| 分类号:S274 |
| 基金项目:国家自然科学基金（51669019）；国家自然科学重点基金（51539005） |
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| Effect of different groundwater depths on the exchange of soil water and groundwater |
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liupeng, yangshuqing
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内蒙古农业大学
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| Abstract: |
| 【Objective】To explore the law of water transport in soil aerated zone under different groundwater depth and irrigation amount,improved irrigation water use efficiency. 【Method】The field experiments were carried out in Hetao Irrigated District on the influence of different groundwater depth and irrigation amount on soil moisture content, groundwater level and water transport in aerated zone. 【Result】The results showed that the soil moisture content of 0-60 cm before and after irrigation changed significantly under different irrigation levels . Irrigation mainly supplemented tillage layer, and the excess water infiltration replenished groundwater, and the infiltration amount accounted for about 25% of the irrigation water. The larger irrigation quota, the more soil water replenished groundwater. The ratios of groundwater recharge and irrigation were L1 Processing >L2 Processing >L3 Processing >L4 Processing>L5 Processing >L6 Processing >L7 Processing >L8 Processing > and L9 Processingin turn. 【Conclusion】For Hetao Irrigated District with an average annual groundwater level of about 1.8 m, a single irrigation of 90mm in the growth period and 300 mm in autumn irrigation, the infiltration of irrigation water could be significantly reduced and diving evaporation could be fully utilized to improve the utilization efficiency of water resources, to realize the purpose of saving water and increasing production. |
| Key words: irrigation amount; groundwater depth;exchange;infiltration capacity |
