协优9516抛秧栽培分蘖成穗与产量构成探讨

Discussion on productive tillers at different position,their panicle charactersand yield in hybrid rice Xieyou 9516 transplanted by seedling casting

通过杂交晚稻协优９５１６抛秧栽培不同节位分蘖成穗情况、干物质积累过程、穗部性状构成的观测与分析，结果表明：协优９５１６抛秧栽培主要靠分蘖成穗而获得增产；与移栽相比，抛秧栽培具有３～５节位分蘖多、总的分蘖成穗率低的特点；其生育期干物质日增量高于移栽稻。

Observations on productive tillers at different nodes,their panicle characters,dry matter accumulation(DMA)and grain yield in hybrid rice Xieyou 9516 transplanted by seedling casting was conductedIt was shown that yield increasing was mainly due to more productive tiller number for the seedling casting cultivation of the hybrid rice;that there were more tillers from the third node to fifth node from culm basal;that productive tiller percentage of the hybrid rice was lower in general and that increment of the DMA/day in growth period was higher,as compared with those seedling for transplanted cultivation