Experiment Research on Irrigation Quota Soil Water Nitrogen Transformation Under Film Hole Irrigation for Corn

To study the film hole irrigation soil moisture and migration transformation characteristic of nitrogen,through irrigation quota were 300,450,600,750m3/hm2 film hole irrigation of corn nitrogen test,the authors put forward the different irrigation quota under the conditions of film hole irrigation farmland soil moisture content of corn and soil nitrate nitrogen and ammonium nitrogen with the changing rule of the maize growth time and experience formula.The results show that the same time,soil moisture content increases with the irrigation quota,while soil ammonium nitrogen content decreases with increasing irrigation quota,soil nitrate content decreases with increasing irrigation quota.The same irrigation quota,the variation regularity of soil moisture content with time was positively cosine function,soil ammonium nitrogen content changes with the birth time first increases and then decreases,and increases then decreases,soil nitrate content changes with the birth time first increases and then decreases,and increases then decreases.Under the condition of different irrigation quota corn film hole irrigation farmland soil moisture content and soil nitrate nitrogen and ammonium nitrogen with the experience formula of the maize growth period of correlation coefficient are greater than 0.930 0,the standard error is very small.