“申优一号”系上海农科院选育的杂交粳稻 ,穗大粒多、米质好 ;茎秆粗壮、抗倒性强 ;用肥量少、产量高等。在肥料试验基础上 ,研究了施氮水平对产量及产量结构、生育性状的影响。1材料与方法1.1供试材料　试验于 2 0 0 0年在吴江市松陵镇站办农场进行 ,供试品种“申优一号” , “Shenyou 1” is a hybrid japonica rice bred by Shanghai Academy of Agricultural Sciences, with large grains and spikes and good quality of rice. Stalks are stout and strong in lodging resistance, with less fertilizer and higher yield. Based on the fertilizer experiment, the effect of nitrogen application rate on yield, yield structure and fertility was studied. 1 Materials and methods 1.1 Test materials The test was carried out in 2003 in Songling Town, Wujiang City, the station to run the test varieties “Shenyou 1”