Comprehensive evaluation of water and fertilizer application for Lycium barbarum L. based on AHP and entropy weight method
DENG Zhen1,2, YIN Juan1,3,4,5*, WU Junbin1, ZHANG Haijun1
1. School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan, Ningxia 750021, China; 2. School of Information Engineering, Ningxia University, Yinchuan, Ningxia 750021, China; 3. The Modern Agriculture in Arid Regions Efficient Utilization of Water Resources Engineering Research Center of the Ministry of Education, Yinchuan, Ningxia 750021, China; 4. Ningxia Research Center of Technology on Water-saving Irrigation and Water Resources Regulation, Yinchuan, Ningxia 750021, China; 5. Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Ningxia University, Yinchuan, Ningxia 750021, China
Abstract：In order to explore the comprehensive effects of water and fertilizer application on the growth, yield and quality of Lycium barbarum L., and obtain the optimal water and fertilizer application, three different irrigation quota(194, 254 and 313 mm)and three different fertilizer rates(135-45-90, 180-60-120 and 225-75-90 kg/hm2)in total nine combinations were set as experiment factors, and a completely random design was carried out. The comprehensive evaluation method of AHP and entropy weight method was used 4 kinds of first grade indexes and 12 kinds of second grade indexes of Lycium barbarum L. and the comprehensive evaluation model for water and fertilizer scheme of Lycium barbarum L. was established. The AHP and entropy weight method were optimized by the least square method to calculate the comprehensive evaluation weight, and the comprehensive evaluation weight was classified by the natural discontinuity method, which was used as the basis for the decision of water and fertilizer combined application scheme. Then, taking the comprehensive eva-luation index as the dependent variable and the irrigation quota and total fertilizer amount as the independent variables, the stepwise binomial regression analysis was carried out to establish the regression equation. The regression equation was established to analyze the influence of the water and fertilizer coupling on the comprehensive evaluation index, and the corresponding water and fertilizer distribution scheme was determined when the comprehensive evaluation index was the largest. The results show that the comprehensive evaluation value of Lycium barbarum L. increase first and then decrease with the increase of water and fertilizer application amount, which is consistent with the actual production. Among all kinds of factors, the grain size, 100 grain weight, dry yield and total sugar have a greater influence on the comprehensive evaluation index of Lycium barbarum L. growth, accounting for more than 73.3% of the total evaluation index. Based on the evaluation of AHP and entropy weight method, the optimal water and fertilizer scheme for the Lycium barbarum L. is obtained as follows: the irrigation quota is 252-278 mm(excluding spring and winter irrigation), and the fertilizer amount(N-P2O5-K2O)is 197-66-131 kg/hm2 to 203-68-135 kg/hm2.
邓箴,尹娟*,吴军斌,张海军. 基于AHP和熵权法的枸杞水肥配施综合评判[J]. 排灌机械工程学报, 2021, 39(7): 712-719.
DENG Zhen,YIN Juan*,WU Junbin,ZHANG Haijun. Comprehensive evaluation of water and fertilizer application for Lycium barbarum L. based on AHP and entropy weight method. Journal of Drainage and Irrigation Machinery Engin, 2021, 39(7): 712-719.
