施肥对优质早稻成穗率与产量的影响

The Effects on Earbearing Tiller Percentage and Yield of Early Rice by Fertilization

为探索当地优质早稻需肥规律,2000～2001年在芦溪县分别针对不同N和K施肥量对优质早稻赣早籼48、不同施肥方式优质对早稻香两优68成穗率和产量的影响进行了研究。结果表明:中N(150kg/hm2)高K(135kg/hm2)处理的水稻成穗率较高,群体通风透光状况良好,光合作用旺盛;一次性全层施肥和全层深施基肥,中后期补施穗肥对早稻均能早生快发,干物质积累量大,尤其是全层深施基肥,中后期补施穗肥处理(T5)的早稻,中后期长势稳健,营养水平好,成穗率和产量较一次性全层施肥明显提高。

In order to explore the fertilizer needing rule of the high quality early rice, some experiences on the N and K fertilization＇s effect on quality and yield of high-quality early rice Ganzaoxian 48 were made in 2000 at Luxi County. The results show： The rice at the treat whose nitrogen （150kg/hm^2） is applied with potassium （135kg/hm^2） grows stable and healthily at early stage, the plant population is appropriate and panicle develops well. Based on the experience of 2000, a plot trial was conducted by using high quality early rice-Xiangliangyou 68 during the whole growth period at Luxi in 2001. Three fertilization methods were used（1,Total basal pressing to whole plough layer;2,Using basal fertilizer in the whole plough layer and adding panicle fertilizer at late stage; 3,Traditional split fertilization method）. The results show： Rice grow rapidly and more dry matter accumulated by using the first and second fertilization method, Especially the Rice of T5 grow stably as well as strongly and have normal nutrition, grain yield and earbearing tiller percentage were increased.