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水稻营养生长期喷施赤霉素可提早成熟,但增产效果不稳定。为获得早熟增产的效果,须喷施适时、浓度适宜、增加基本苗。水稻营养生长期喷施赤霉素有抑制分蘖出生,促进主茎和早出生分蘖生长的效应。正确运用这一效应,可以控制最高苗数和过剩分蘖,提高稻株的生理活性,增进优势蘖成穗,促进主茎和早出生分蘖的发育,获得穗大粒多、早熟增产的效果。
Gibberellin can be prematurely matured during the vegetative growth period of rice, but the yield increase is not stable. In order to obtain the effect of early maturity and increased yield, appropriate spraying and appropriate concentration should be given to increase the basic seedlings. The gibberellin sprayed in rice vegetative growth period has the effect of inhibiting tillering and promoting tiller growth of main stem and early birth. Correct use of this effect can control the highest seedling number and excess tillering, improve the physiological activity of rice plants, increase the tillering panicles to promote the development of main stems and early tillers, ear large grains, early maturity yield.