施氮量对超级稻桂两优2号生育特性和产量性状的影响

研究不同氮肥施用量对超级稻桂两优2号生育特性和产量性状的影响,为桂两优2号以及同类超级稻品种筛选出高效施肥模式和高产施肥模式。采用随机区组设计,设6个不同氮肥施用量(0、90、150、210、270、330 kg/hm2)处理,调查其茎蘖穗的生长动态以及产量性状变化。结果表明:桂两优2号在中等施氮水平下才能建立良好的群体结构,利于干物质积累和获得较高产量,施氮肥210 kg/hm2的产量最高,为8 651.7 kg/hm2,其对茎蘖数动态控制及干物质的积累最有利;不施氮处理的产量最低。

Influence of Different Rates of Nitrogen Fertilizer on Growth and Physiological Characteristics of Super Rice Guiliangyou 2

Effects of different rates of nitrogen fertilizer on growth and physiological characteristics of superhe rice variety Guiliangyou 2 were investigated in order to provide best cultivation regulation and population control in Guiliangyou 2 and similar super rice cultivars. A randomized block experiment was conducted using six different nitrogen fertilizer dosage ( 0 , 90 , 150 , 210 , 270 and 330 kg/hm 2) to investigate the growth dynamics of stem , tillering and panicle and yield during growing season. The results showed that Guiliangyou 2 in the medium nitrogen levels was able to establish a good group structure , accumulate dry matter and get higher yield.210 kg/hm 2 N processing could get the highest yield ( 8 651.7 kg/hm 2), it was beneficial to control the tiller dynamic and accumulate dry matter ; the production without nitrogen fertilizer was minimal.