水稻早熟品种分蘖生产力的初步分析 Ⅶ．不同插秧期的分蘖生产力

Analysis of the Tiller Productivity of Early Rice Cultivars Ⅶ Tiller Productivity at Different Transplanting Stage

摘要:

本研究着重探讨了旱育稀植栽培技术中,早插壮秧这一基干措施。设置了从5月15日至6月4日每隔5 d插秧的5种不同插秧期的处理。试验结果表明,北方寒冷稻作区,过早插秧虽然千粒重和稳粒数增多,但由于低温寒潮对于移栽伤影响严重,造成决定穗数的低节位分蘖过少,不易获得高产。插秧过晚,气温高,缓苗快,低节位分蘖多,单位面积有效穗数增加,但营养生长期延迟,千粒重和穗粒数明显降低,不易争取稳产。所以早播壮秧应该是避开低温寒潮的适时早插。

Abstract:

The basic method of early transplanting the sturdy seedling is studied among the upland nursery and thin planting cultivation system.Five different transplanting stage treatments are arranged every 5 days from May 15 to June 4.The results show:at the North cold rice planting area, too early transplanting can increase the grain weight and number, but being the effect of low temperatare, the tow position tillers decreased which determining the number of panicle.This is not easy to get heigh yield.If transplant too late, the temperature is high, the seedling grows fast, and rice has more low position tillers.So the panicle number increased, and the weight and number of the grain becomes less.This is not easy to get stabe yield.So early transplanting the sturdy seedling should avoid the low temperature time.