根据水稻穗肥施用的原则:旺苗不施,壮苗少施,弱苗多施;用有机肥或迟效化肥作穗肥的则应适当提早施用;穗肥应在幼穗分化期施用。为了探讨从外观上看出水稻各类型、各品种幼穗分化期的共同特征,四年来,我们通 According to the principles of rice panicle fertilization: no seedlings, strong seedlings less facilities, weak seedlings more application; with organic fertilizer or late fertilizer for panicle should be appropriate early application; panicle should be applied in young panicle differentiation. In order to explore from the appearance of all types of rice, panicle differentiation of the common characteristics of various varieties, four years, we pass