The Studies On Under Mulch Drip Irrigation System Of Maize In Western Region Of Hei Long Jiang Province

Regard Maize as experimental material and performance the experiment of irrigation system about corn field under the condition of drip irrigation under mulch,change its irrigation quota、irrigation times, then make different experimental processing, through observing rainfall、soil water content and analysis water consumption of maize by using water balance equation. Measuring production of mature maize and obtain a series of yield indexes, analysis the effect of irrigation system on yield indexes. through studying the yield、water consumption and irrigation water and get its water use efficiency、irrigation water productivity 、combined with conventional irrigation benefit analysis and comprehensive equity consideration so as to determine optimal irrigation system. We obtained the following conclusions:(1) Water increased with the increase of irrigation quota increases, the change trend of water consumption intensity of the early stage is small while the middle stage reaches the maximum and the late decreases. Comparing each treatment, their water consumption coefficient was not significantly change.(2) Spike length, ear diameter, spike weight, the grain weight have a big relationship with irrigation quota and present a increasing trend with the increase of irrigation quota; Analysis grain number, ear rows and irrigation system, the change law of them is not obvious; Irrigation quota and irrigation frequency have a very big effect on reducing bald tip.(3) Through analyzing the same irrigation system with different irrigation frequency, it can be seen that it has not a big influence on corn yield under the relatively small irrigation quota of irrigation, but while irrigation quota is larger, increase irrigation times properly has a benefit of increasing of soil moisture content and offer help for the high yield of maize. Analyzing the same irrigation frequency with different irrigation quota can be seen that under the condition of irrigation frequency constant, improve irrigation quota appropriately has a certain effect on enhancing soil moisture content, but when the irrigation quota increase to a certain extent, the change of soil moisture content is not so obvious.(4) The prophase investment of Membrane under drip irrigation mode under is larger; it has agricultural cost and piping cost while conventional irrigation mode has not But its large output and the output of crop quality is good, so leading to a higher value after harvest. In addition, corn straw yield of film with drip irrigation is better than conventional corn production.(5) In the actual production, we are going to analysis from the perspective of the yield, water saving and benefit, with the irrigation quota of 450 m3 / hm2 and irrigation times of 3, then the yield has reached 14741 kg/hm2, water production efficiency is 3.15 kg/m3, irrigation water productivity has reached 32.76 kg/m3 and income has reached 513.3 Yuan/mu. This is a reasonable irrigation mode.