水稻单株分蘖出生规则,一般沿用(n-3)法则。单季晚稻主茎总叶数从4～12叶,出叶速度在5天左右,其分蘖1～4叶约在4天左右出生一张叶片,同主茎出叶速度相差甚微。故分蘖基本按(n-3)的叶蘖同伸规则出生。主茎12叶以后,其出叶速度减慢,一般6～7天左右出生一张叶片,而分蘖的1～4 Rice tillers tillers birth rules, the general use of (n-3) law. The single leaf late rice main stem total leaf number from 4 to 12 leaves, leaves the speed in about 5 days, its tiller 1 to 4 leaves about 4 days a leaf was born, with the main stem leaves a little difference in speed. Therefore, the basic tiller (n-3) of the same rules of leaf-tip was born. After the main stem 12 leaves, its leaf out of slow, usually 6 to 7 days or so leaves a leaf, and tillering 1 to 4