施肥方法和栽培密度对水稻品种间产量与品质的影响

EFFECTS OF DIFFERENT FERTILIZER APPLICATION MODES AND PLANT DENSITIES ON YIELD AND QUALITY OF RICE

首先，分析了不同水稻品种、不同施肥方法和不同栽培密度３种主效应以及它们的互作效应对水稻产量性状的影响。结果表明，基因型是决定产量性状表现的主要因素。不同施肥方法和栽培密度对大多数产量性状有影响。在合理的栽培密度内，密度对产量的影响不大。互作效应对产量性状的作用不大。由此可知，这３个主效应对产量性状的作用大多数是独立的。因此，要获得高产，第一是选择高产品种（早稻产量以舟优９０３为高，晚稻以协优４６为好）；第二是采用合理的施肥方法（以施保花肥和粒肥为好）。其次，分析了不同施肥方法对杂交晚稻品质的影响。

Effects of different rice varieties,modes of fertilizer application and plant densities on yield traits of rice were studied.The results indicate that genotype is a main factor determining yield traits, fertilier application mode and planting density have also some effects on most yield traits. If the plant density is fit,it has only a little effect on yield.Effects of three factors on yield are independant.To gain high yield needs to select highyielding varieties firstly and suitable modes of fertilizer application secondly.The multiple range tests indicate that Zhou 903 and Xieyou 46 give the highest yield in early cropping and late cropping,respectively.Among different modes of fertilizer application,applying spikeletdeveloping fertilizer and grain-filling fertilizer can give better effect.Lastly,the effects of different fertilizer application modes on quality of rice are also analysed.