| Cite this article: | 景向崇,李瑞平,范理权,等.河套灌区秋耕措施与秋浇定额对翌年土壤水盐氮调控和综合效益评价[J].灌溉排水学报,0,():-. |
| JING Xiang-chong,LI Rui-ping,FAN Li-quan,et al.河套灌区秋耕措施与秋浇定额对翌年土壤水盐氮调控和综合效益评价[J].灌溉排水学报,0,():-. |
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| Responses of soil water and salt ions to autumn tillage measures and autumn watering quota during freeze-thaw period in Hetao irrigation area |
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JING Xiang-chong, LI Rui-ping, FAN Li-quan, ZHANG Yin
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College of Water Conservancy,Civil Engineering,Inner Mongolia Agricultural University,Hohhot
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| Abstract: |
| In order to explore the response mechanism of soil moisture to autumn tillage measures and autumn watering quotas in the following year after autumn watering in salinized irrigation areas under the background of water saving in autumn watering depth, combined with the actual autumn watering situation in Hetao irrigation area, field experiments of three autumn tillage measures (no-tillage (MG), tillage (FG), tillage and laser leveling (FP)) and two autumn watering quotas (1500m3/hm2(1) and 2000m3/hm2(2)) were carried out. In order to ensure the seedling emergence rate and economic benefits of crops, the regulatory effects of various treatments on soil moisture at spring sowing stage were discussed. Finally, the water-saving evaluation index system of irrigation area was constructed from three aspects: economic benefit, soil improvement benefit, social and ecological benefit, and the combination weight was determined by analytic hierarchy process and entropy weight method, and the optimal measures were obtained based on the combination weight and TOPSIS method to comprehensively evaluate and rank the treatment control level. The results showed that: (1) The ploughing and laser leveling measures performed well in improving soil water storage, desalination effect, crop emergence rate and economic benefits, and had significant comprehensive control advantages, among which the seedling emergence rate of spring maize with autumn watering quota of 1500m3/hm2 was 94.53% and 93.22%, respectively, and the net income was 23893.5 yuan/hm2 and 23731.1 yuan/hm2, respectively, and the comprehensive benefits were better. (2) Under the measures of tillage and laser leveling, the comprehensive evaluation index of 1500m3/hm2 of autumn pouring quota was the highest 0.678, which was the optimal measure. |
| Key words: Hetao irrigation area; autumn ploughing measures; autumn pouring quota; spring sowing control; Comprehensive benefit evaluation |
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