对三熟制早稻用氮素化肥作穗肥进行了研究。结果表明:不论何时施用穗肥,其产量与不施稳肥的比较,无明显不同;在生育后期天气不利时,还有减产趋势;考察主要经济性状,也无明显差异。因此,在通常育秧栽培情况下,三熟制早稻采用传统的集中前期施肥法,即施足基肥,早施足量分蘖肥,一般不施穗肥,必要时施用适量穗肥保花,是适合生产实际的。 Three kinds of early rice with nitrogen fertilizer as a panicle fertilizer were studied. The results showed that there was no significant difference in yield when compared with no fertilization at any time, and there was also a trend of decrease in yield when the weather was unfavorable in later growth period. There was also no significant difference in the investigation of major economic traits. Therefore, in the normal case of raising seedlings, three-cropping early rice using the traditional centralized pre-fertilization method, that is, the application of sufficient base fertilizer, early enough amount of tillering fertilizer, the general does not apply spike fertilizer, if necessary, the appropriate amount of spike fertilizer, is suitable Production is real.