Mathematical models for single-line interference infiltration of fertilizer solution in film hole

Based on lab.experiment,characteristics of single-line interference irrigation of fertilizer solution in film hole were analyzed.Four mathematical models were presented based on different measured data,such as Kostiakov model,piecewise function model,reduction volume model and increasing infiltration ratio model for film hole fertilizer solution single-line interference irrigation.Kostiakov model is based on the infiltration parameters of film hole single-line interference infiltration which are known;Piecewise function model is based on the infiltration parameters of two stages of film hole single-line infiltration-film hole free infiltration and interference infiltration which are known;Reduction volume model is based on the rate of reduced infiltration that film hole single-line infiltration compared with film hole free infiltration and the parameters of free infiltration which are known;Increasing infiltration ratio model is based on the rate of increased infiltration that film hole fertilizer solution single-line interference infiltration as compared with film hole single-line interference infiltration and the parameters of fresh water infiltration which are known.The four infiltration models are effective models for film hole fertilizer solution single-line interference irrigation through the measured data.The calculation precision of piecewise function model is the most accurate.The calculation precision of three others' is relatively less accurate.The models may be selected in the light of measured data.