Fuzzy Control System of Substrate Lettuce Cultivation Based on Light-Dependent Irrigation Control Method

The light-dependent irrigation control method is currently a relatively advanced greenhouse production irrigation control method. However, in domestic greenhouse applications, the empirical parameters imported from abroad are basically used. Due to the inconsistent climatic conditions, there is a problem that the plant growth cannot be accurately controlled. In order to promote the application of the light-dependent irrigation control method in the production of domestic facilities, combined with the substrate moisture content and the electrical conductivity of substrate leachate, the fuzzy control method is used to further adjust the irrigation amount and the electrical conductivity of irrigation nutrition, which precisely controls greenhouse irrigation and fertilization. According to the experimental comparison, there is no difference between the advanced method and the traditional light-dependent irrigation control method on the yield of lettuce, but the water use efficiency of the plant is improved under the premise of ensuring growth.