通过~(15)N示踪方法,在两种不同土壤进行了ROC1品种对铵盐、硝酸盐和尿素这三种N肥的利用率研究。发现用不同氮肥或不同土壤类型的产量差异不显著。但是铵盐和尿素两种不同氮肥的施用部位不同,产量差异则很显著。蔗株地上部对铵盐、硝酸盐、尿素N的利用率分别为22％～36％,22.6％—25.4％,13.5—23.8％(表1)。除了硝酸 By using (15) N tracer method, the utilization of three N fertilizers, ammonium, nitrate and urea, of ROC1 was studied in two different soils. No significant differences were found in the yield of different nitrogen fertilizers or different soil types. However, ammonium nitrogen and urea two different nitrogen fertilizer application site is different, the yield difference is very significant. The utilization rates of ammonium, nitrate and urea N in aerial parts of cane plant were 22% -36%, 22.6% -25.4% and 13.5-23.8% respectively (Table 1). In addition to nitric acid