Evaluation on Well-Canal Combined Irrigation Modes for Cotton Fields in the South of Xinjiang, China Based on an Algorithm of Fuzzy Neutral Network

The research aims to improve water shortage in irrigation of cotton fields and reduce salinization damages in irrigation areas of Tarim River (in the south of Xinjiang Uygur Autonomous Region, China). For this purpose, this study determined soil electric conductivity, ion concentration and key indexes for describing crop growth conditions under different irrigation modes. Based on this, 10 groups of sample data under five irrigation modes were obtained. Moreover, this research analyzed sample data by using an algorithm of fuzzy neutral network (FNN) and discussed the optimal irrigation mode suiting for cotton fields in the region. The results demonstrate that the mode 4 obtains the best overall effects among the five irrigation modes, that is, mixed irrigation mode of 1/4 well water and 3/4 canal water shows the optimal irrigation effects. The relevant research results have practical significance and popularization value for guiding the selection of irrigation modes for cotton fields in the research region.