Research On The Technique Of Film Hole Irrigation For Corn In Diversion Yellow River Irrigation District

This thesis is aimed at the technique of the film hole irrigation which solved immediately in Ningxia Diversion Yellow River Irrigation Area ,and the paper depends on saving-water irrigation experiment field at Shifosi township of DongTa of District of Wu Zhong City where belongs to Ningxia Diversion Yellow River Irrigation Area , adopts regression rotators experiment design,orthogonal test design and infiltration experiment,takes the technique of saving-water irrigation, computer and mathematical statistics as research measures.Analyzing the infiltration regulation of surface water flow motion data of film hole irrigation. The best fitting of N, P fertilizer and the irrigation system of film hole irrigation , the coupling problem how optimize water and fertilizer are systematically research on in the thesis,the research results are as folows:1. Through the infiltration field experimental data, the relation between the cumulation infiltration requirement and time is founden: Z=7.90t^0.622 .Through the field experiment data of surface water flow motion of film hole irrigation . We know that the speed of film hole irrigation is faster than the speed of ground irrigation . At the same time, we know that the distance and time of water flow advance of film hole irrigation accord with power function:t_{畦膜}=0.479y_{畦膜}^0.9934; t_畦=1.16y_畦^0.9242.2. Under the same condition,the irrigation quantity,the times of irrigation, N/P fertilizer are selected as experimental factors, the different system of irrigation which affected the corn yield and the corn physiological indexes are analyzed systemic.At last, the best fitting of water,N/P fertilizer are founded.3. Aiming at the coupling problem how optimize water and fertilizer for corn in Ningxia Diversion Yellow River Irrigation Area, using three factors square regression design, the structure of water and fertilizer for corn, make certain the regulation between irrigation requirement, Nitrogen requirement and the organic fertilizer requirement is founded:y=994.9+45.2x₁-15.5x₂+10.9x₃-52.8x₁X2+10.7x₁X₃-6.5x₂X₃-23.2x₁₂-32.3x₂₂-15.9x₂₃,and the model is analyzed and optimized, the order and character of every factors affected on corn yield are obtained.4. Adopting contrast experiment, analysising the film hole irrigation and no-film irrigation, and getting the film hole irrigation corn-growth is 1.5 times as high as that of the no-film irrigation . The film hole irrigation enhanced the production and the economy benefit.This subject results fill up the technical shortage of the corn film irrigation in the Ningxia yellow river irrigation area , and providing the theories for the film irrigation etc. saving water district technique expansion.