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Integrated Evaluation of the Water Deficit Irrigation Scheme of Indigowoad Root under Mulched Drip Irrigation in Arid Regions of Northwest China Based on the Improved TOPSIS Method

College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou 730070, China
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Academic Editor: Laura Riesgo
Water 2021, 13(11), 1532; https://doi.org/10.3390/w13111532
Received: 31 March 2021 / Revised: 21 May 2021 / Accepted: 25 May 2021 / Published: 29 May 2021
(This article belongs to the Special Issue Water Saving in Agriculture)
Limited water resources and low water productivity limit the sustainable development of agriculture in northwest China. In this study, drip irrigation under plastic film was used to achieve an optimal water deficit irrigation (WDI) scheme for the cultivation of indigowoad root (Isatis tinctoria L.). Field water control experiments were conducted in 2016 and 2017. Evaluation of WDI schemes was carried out by considering five indices: water consumption, yield, water use efficiency (WUE), indigo, and (R,S)-goitrin. To enhance the reliability of results, the analytic hierarchy process (AHP) and entropy weight method (EWM) were adopted to calculate the combined weight of the evaluation index. Finally, an improved technique for order of preference by similarity to ideal solution (TOPSIS) that integrated AHP–EWM weights was used to construct a unified, comprehensive evaluation model of indigowoad root under mulched drip irrigation that would produce high yield while saving water. The evaluation results indicated that mild WD (specifically, the V1G1 treatment) was continuously exerted during the vegetative and fleshy root growth periods, which enhanced the WUE and improved the quality of indigowoad root to a certain extent without significantly reducing the yield. These results provide a scientific basis for irrigation of indigowoad in northwest China and other areas with a similar environment. View Full-Text
Keywords: indigowoad root; water deficit irrigation; TOPSIS; combination weights; comprehensive evaluation indigowoad root; water deficit irrigation; TOPSIS; combination weights; comprehensive evaluation
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MDPI and ACS Style

Wang, Z.; Zhang, H.; Wang, Y.; Zhou, C. Integrated Evaluation of the Water Deficit Irrigation Scheme of Indigowoad Root under Mulched Drip Irrigation in Arid Regions of Northwest China Based on the Improved TOPSIS Method. Water 2021, 13, 1532. https://doi.org/10.3390/w13111532

AMA Style

Wang Z, Zhang H, Wang Y, Zhou C. Integrated Evaluation of the Water Deficit Irrigation Scheme of Indigowoad Root under Mulched Drip Irrigation in Arid Regions of Northwest China Based on the Improved TOPSIS Method. Water. 2021; 13(11):1532. https://doi.org/10.3390/w13111532

Chicago/Turabian Style

Wang, Zeyi, Hengjia Zhang, Yucai Wang, and Chenli Zhou. 2021. "Integrated Evaluation of the Water Deficit Irrigation Scheme of Indigowoad Root under Mulched Drip Irrigation in Arid Regions of Northwest China Based on the Improved TOPSIS Method" Water 13, no. 11: 1532. https://doi.org/10.3390/w13111532

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