寒地水稻氮肥精确定量施肥研究

Research on Rice Precise Quantitative Fertilization of Nitrogen in Cold Area

为确定虎林地区水稻精确定量施肥的参数值,进行水稻氮肥精确定量施肥试验,结果表明,不同肥力地块施用等量的氮肥水稻增产程度和氮肥利用率不同,1号地土壤肥力较高,供氮量为4.82 kg/667 m2,施氮增产53.2%,2号地的土壤供氮量为5.0 kg/667 m2,施氮增产31.6%。肥力越低施氮肥氮肥利用率越高、增产越高。

Rice precise quantitative fertilization of nitrogen were made in order to confirm parameter values and the result indicated that production effect and nitrogen utilization efficiency were different under all the levels of soil fertility with equal nitrogen, nitrogen supply of Block 1 which had higher soil fertility was 4.82 kg/667 m= and increase production with 53.2%, nitrogen supply of Block 2 was 5.0 kg/667 m= and increase production with 53.2%,it pointed out that the lower fertility, the more nitrogen utilization efficiency and production can be achieved.