天两优616氮肥运筹试验初报

Application Experiment of Nitrogen Fertilizer for Tianliangyou 616

探索了适宜超级稻高产的氮肥基肥、分蘖肥与穗肥运筹比例,形成了可量化的氮肥施入量及高效运筹技术。在超级稻高产攻关项目区采用精确定量施肥技术,开展氮肥基肥、分蘖肥、穗肥3个不同比例试验,找出最佳施肥方法。结果表明:用氮肥作基肥、分蘖肥与穗肥按4∶3∶3处理的施肥效果最佳,产量最高,达667.0kg/667m2,比对照增产82.3%;经济效益和产投比最高,分别达到16700.4元/hm2和8.23,与其他处理有极显著差异。在水稻生产中应重视穗肥的施用、运筹比例和施用时期。

The application ratio of base nitrogen fertilizer to tillering fertilizer to panicle fertilizer that suit for high yield of super hybrid rice was explored,and the quantifiable application rate of nitrogen fertilizer and the efficient application technique were formed.In order to find out the optimum fertilization method,three experiments with different ratios of base nitrogen fertilizer to tillering fertilizer to panicle fertilizer were conducted by using accurate quantitative fertilization technique to the key project area of high yield of super hybrid rice.The results showed that when ratio of base nitrogen fertilizer to tillering fertilizer to panicle fertilizer was 4：3：3,the fertilization effect was the best,the yield was the highest that reached 10 005 kg/hm2 and increased by 82.3% than control,the economic effect and the ratio of input to output were the highest,which reached 16700.4 Yuan/hm2 and 8.23,respectively.The results of this ratio had extremely difference with that of the others.Therefore,it should pay attention to the application,application ratio and application time of panicle fertilizer during rice production.