Studies On Applying Fertilizer Technique In Cotton With The Drip Irrigation Under Mulch In ShiHezi

Recently, the cotton area with drip irrigation under mulch developed rapidly, but applying fertilizer technique base on experience, it influences the beneficial result of the applying fertilizer. In the experiment,employing field block experiment integrating pot culture experiment,field contrast experiment and completely random block experiment design,applying mathematics statistics method such as regression analysis and correlation analysis and so on,chemical analysis method such as alkali disintegrate spread,distillation contrast color and so on.we had studied applying nitrogenous fertilization technique result of enhancing yields, utilization ratio, applying fertilizer quantity and nitrogen, phosphorus transfer regularity in field, exploring the dependable parameter and technique of the applying fertilizer, to guide the agriculture producing.The results of experiment are as follows: the nitrogen fertilizer with the drop of water moves and distributes to mainly be subjected to the influence of the water transfer; the function of the soil absorbing and fixing the nitrogen fertilizer is weak, the nitrogen fertilizer with the drop water can be moved and assigned the layer of each part of the soil. Explain the phosphorus with drip irrigation are easily absorbed by the soil, not easily move, it mainly moves in 0~10cm soil with horizontal and perpendicular moving, moving short distance, distributing concentrate.In the cotton harvest time, sampling to analyze, according to the subtraction counts nitrogen fertilizer utilization is 48.58%~53.15% in the cotton with drip irrigation, utilization of phosphorus is 18.73%~24.84%. Among them, phosphorus as base manure match a dripping, fertilizer utilization is tallest, it raise 2.51~4.66 percent than all phosphorus as base manure or all dripping, the cotton yield is tallest with a drop of processing match phosphorus as base manure. Applying phosphate fertilizer technique in cotton with the drip irrigation under mulch is very important. It influences the yield of cotton.According to the regularity of applying nitrogen and phosphorus with drip irrigation move and distribute in the soil, the nitrogen fertilizer can be applied all with the drop of water, but applying the phosphate fertilizer with the drop of water, it moves uneasily, it concentrate distribute in 0-10cm soil, it is disadvantage absorbed in after expect a department of cotton, so applying phosphorus should insist on the principle of base manure as dominant, with drop water as assist, it is suitable to reduce phosphorus as base manure in cotton, increase applying phosphorus with drip irrigation in sandy soil, 80% phosphorus as base manure in loam, the surplus phosphorus apply drip irrigation. According to fertilizer effect equation, we can get the best apply nitrogen and phosphorus quantity is 223.35kg/hm~2 and 86.55kg/hm~2, the best nitrogen and phosphorus comparison is 1:0.39.