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氮素是农作物生长和获得高产所必须的重要营养元素。世界各国氮素化肥约占植物养分总量一半以上;我国每年氮肥使用量,约占全部化肥的80%左右。国内外研究表明,氮素化肥的利用率很低,一般只有25—50%,浪费极为严重。因而提高氮肥利用率,减少损失,发挥肥料更大的经济效益,就成为当前各国农化工作者十分重视的一项研究课题。从1976—1977年,我们应用同位素~(15)N、~(32)P示踪法,以盆栽、大田微区与大田小区试验相结合,进行本项研究。
Nitrogen is an important nutrient necessary for crop growth and high yield. Nitrogen fertilizers account for more than half of the total plant nutrients in all countries in the world. The annual amount of nitrogen fertilizer used in our country accounts for about 80% of the total fertilizers. Domestic and foreign studies show that nitrogen fertilizer utilization rate is very low, generally only 25-50%, the waste is extremely serious. Therefore, improving the utilization of nitrogen fertilizer, reducing losses and giving full play to the greater economic benefits of fertilizers have become the research topics that attach great importance to agrochemical workers in various countries at present. From 1976 to 1977, we used isotope ~ (15) N, ~ (32) P tracer method to combine the pot experiment, field micro field and field plot test.