Research on the most suitable irrigation method for alfalfa based on entropy weight-TOPSIS

• Published in: Journal of agricultural resources and environment Vol. 42; no. 1; p. 249
• Main Authors: Baiheti, Meihemuti, Ding, Feng, Li, Yan, Dang Longxin
• Format: Journal Article
• Language: Chinese
• Published: Tianjin Journal of Agricultural Resources and Environment (JARE) 01.01.2025
• Subjects: Agricultural production; Alfalfa; Crop yield; Crops; Drip irrigation; Efficiency; Entropy; Irrigation; Irrigation efficiency; Irrigation water; Nutritive value; Soil moisture; Water conservation; Water use; Water use efficiency; Weight
• DOI: 10.13254/j.jare.2024.0605
• ISSN: 2095-6819

为探求不同灌溉方式对苜蓿的影响并优选最适宜该地区的灌溉方式，本研究以紫花苜蓿为研究对象，通过小区对比试验，探讨新疆乌昌地区3种主要灌溉方式（W1浅埋式滴灌、W2地表滴灌和W3平移式喷灌）对苜蓿生长、产量和水分利用效率的影响，并采用熵权-TOPSIS综合评价法，优选适宜于该地区苜蓿生产的节水灌溉方式。结果表明，W1处理能够有效提高土壤水分含量，在苜蓿生长期内0~60 cm土壤含水量都显著高于W2和W3处理（P<0.05）。W1处理苜蓿三茬总产量最高，为14 379.4 kg·hm-2，较W2和W3三茬平均灌溉水利用效率分别提高了11.76%、46.15%。W1处理和W2处理三茬相对饲喂价值没有显著差异（P<0.05），其中W1处理三茬平均相对饲喂价值最高为121.3，其营养品质最好。利用熵权-TOPSIS法加权计算相对贴近度Si，最终得出W1处理贴近度最大，为0.522，是本试验中最优的方案，该处理既能获得较高的产量和品质，又能提高水分生产效能。研究表明，浅埋滴灌可以明显提高苜蓿产量和水分利用效率，在水资源短缺的干旱地区可选用浅埋滴灌作为苜蓿适宜的节水灌溉方式。To investigate the impact of various irrigation methods on alfalfa and determine the most suitable for the region, the study used alfalfa as the subject and conducted plot comparison experiments. It examined the effects of three primary irrigation methods—W1 shallow subsurface drip irrigation, W2 surface drip irrigation, and W3 horizontal jet irrigation on the growth, yield, and water use efficiency of alfalfa in the Wuchang region. Employing the entropy weight-TOPSIS comprehensive evaluation method, the study aimed to identify the