Research On The Technique Of Film Hole Irrigation

This thesis is aimed at the technique of film hole irrigation which need solved immediately in Ningxia Diversion Yellow River Irrigation Area , and the paper depends on water-saving irrigation experiment field at Ma Lianqu township of Litong District of Wu Zhong City where belongs to Ningxia Diversion Yellow River Irrigation Area, adopts regression rotators experimental design, orthogonal test design and infiltration experimental, takes the technique of water-saving irrigation, computer and mathematical statistics as research measures. The infiltration .behaviors of surface water flow motion data of film hole irrigation were analyzed. The best fitting of N, P fertilizer and the irrigation system of film hole irrigation , the coupling problem how optimize water and fertilizer were systematically research on in this thesis, the research results are as follows:1. The research situation and trend of film hole irrigation technique were summed up.2. Through the infiltration field experimental data, the formula of film hole irrigation were founded, h=l. 1170t0.8364 v=0.9343t-.01636, and the experimental installation which measured the speed of infiltration was improved. Through the field experimental 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, t2=0.1564L1.2936.3. Under the same condition, the irrigation, times of irrigate, fitting of N and P fertilizer were selected as experimental factors, the different system of irrigation which effected the yield and physiological indexes on maize were systematically analyzed. At last, the best fitting of water, N and P fertilizer were found.4. Aiming at the coupling problem how optimize water and fertilizer for maize in Ningxia Diversion Yellow River Irrigation Area, using three elements square regression design, the structure of water and fertilizer for maize, arrive at irrigation requirement, Nitrogen applied, Phosphorus applied and their effects on maize yield were carried on, which isy=756. 2+53. 3X1+7. 3X2+18. 7X3+27. 2X1X2-0. 6X1X3+21. 5X2X3-30. 9X12-12.9X22-30.8X32, and the model was analyzed and optimized, the regular and character of every factors effected on maize yield were obtained. At the same time , using three elements square regression design method, the regression model of physiological indexes on maize were carried on, and there models and coefficient were tested by F and t, some of them are obvious.Its research achievements fill in the blank of coupling problem how optimize water and fertilizer of film hole irrigation in Ningxia Diversion Yellow River Irrigation Area, and a theoretical foundation for film hole irrigation was provided.