Effect Of Irrigation Furrow Length Uniformity And Yield Of Summer Corn In Jinghuiqu Irrigation District

Jingyang town under the bridge of the test plots Jinghuiqu irrigation district belongs(108 ° 29’40 "~ 108 ° 58’23" E, 34 ° 26’37 "~ 34 ° 44’57" N), in high summer maize variety "Jin Bei 288" as the test material, and by field experiment was combined with local farmers used irrigation methods for the control, set three long furrow irrigation treatment(80m, 120 m, 240m), along in each border longitudinal direction of the divided four processing cells, changing water into a number of eighty percent. Research on the long furrow irrigation variation of summer corn growing period agronomic traits, the effect of long furrow irrigation on water consumption characteristics and yield of summer corn in the growth period, the soil water distribution and its relationship with the yield component factors and other problem, select the best possible balance between saving and high yield long stretch. To field crops yielding water-saving irrigation area Jinghuiqu irrigation district provide a theoretical basis.The main conclusions test are as follows:(1)As the growth period of summer maize plant height, stem diameter and leaf area is also increasing. In the jointing stage to increase the speed of these physiological characteristics heading fastest, heading the end of the growth rate gradually slowed down, filling in the agronomic traits of indicators have reached the peak, the end of the filling is slightly reduced. With the plant dry matter accumulation and growth stage propulsion is changing, with the increase in the total amount of accumulated growth period showed an increasing trend from jointing stage to enter the vegetative growth stage of development, growth has accelerated to the filling phase to reproductive and developmental stage the total dry matter accumulation of further increases, the end of the mature peaked and stabilized. Length of 80 m and 120 m stretch of agronomic traits in summer corn growing more average coefficient of variation is low, less affected by the length of the border.(2) During the summer maize growth in water consumption from irrigation water and rainfall Border, where irrigation water in a dominant position. Jointing- heading of early summer corn plant growth and development is moisture sensitive period. In the late stage pre-heading and filling stage proper water control will not affect crop growth and development. Wherein the amount of water at jointing and filling stages two more times, respectively 101.29 mm and 108.44 mm, tasseling relatively small amount of water is 76.59 mm. Under normal circumstances, when the border is not the same length, soil water storage amount will increase with the length of the border showing increasing trend in the growth period of summer maize water consumption will increase.(3)Long stretch have an important impact on the vertical section of soil moisture distribution. Border length 0-80 cm soil for soil moisture influence more significant; irrigation uniformity affected long stretch of more obvious, different border lengths with the growth period, irrigation uniformity both showed "low- high- high" trend plot is 80 m long and furrow irrigation uniformity along the length direction of the 120 m high. The long stretch of time 240 m, the water flow will occur unable to advance to the end of plot, Central Border leakage occurs or a large amount of water in the deep furrow tail cause leakage, resulting in a waste of water. So in the summer maize growth period that is able to ensure an adequate supply of water, irrigation water uniformly and will not cause a lot of waste, choose 80 m short plot is more reasonable.(4) The average yield of summer corn, kernel weight, single panicle weight, increases long stretch of showing a decreasing trend, 80 m and 120 m long stretch yield a more even distribution, the difference was not significant, 240 m long stretch of production exist significant differences. Ear length, ear diameter difference increase as long stretch is not significant, at 80 m long furrow irrigation conditions, the yield of summer maize and its components of the performance is more average, less affected by the long stretch of variation.(5) Correlation between soil moisture and yield, Filling of the maximum depth of each soil, other growth period were less affected. With increasing water use efficiency of irrigation and decreases the length of the short stretch will help improve the efficiency of irrigation water use. 80 m long furrow irrigation under conditions of water use efficiency is highest and most uniform distribution, yield was 10218.39 kg · hm, water use efficiency was 25.12 kg · hm · mm, is the most recommended length worth of irrigation and use.