膜孔灌溉条件下玉米灌溉制度试验

通过大田试验研究了膜孔灌溉条件下，不同灌溉制度对玉米土壤水分动态、产量及其指标以及水分利用的影响。研究表明：灌溉定额4500m3/hm2时与灌溉定额为5400 m3/hm2的产量相近，但前者的水分利用效率却明显高于后者，灌溉定额为3600 m3/hm2时，虽产量明显低于前两者，但其水分利用效率最高2.7273kg/m3，故最节水。在当地灌溉定额为4500m3 m3/hm2.、灌水四次的灌溉制度经济效益最优。且在相同的灌溉制度下膜孔灌溉与不覆膜对照相比，具有明显的增产效果和较高的水分利用率。

Irrigation Schedule of Corn of Film Hole Irrigation

The paper researched on the influences of different film-hole irrigation schedules on soil water content, yield, and water use efficiency in corn field. The result indicated that the yields are similar for the irrigation quotas of 4 500 m^3/hrff and 5 400 m^3/hm^2, but the water use efficiency of the former is higher than that of the later. When irrigation quota decreased to 3 600 m^3/hm^2, yield is lower than the others, hut its water use efficiency is the highest, with the water productivity of 2. 727 3 kg/m^3. Therefore, it could save much more water than the others. In the region, the optimal economic benefit can be obtained if irrigation quota is 4 500 m^3m^3/hm^2 and irrigation at four tin-~ Compared with ordinary irrigation, film-hole irrigation has great effects in increasing yield and water use efficiency.