一、空秕粒的种类及产生原因水稻出穗以后,积蓄在茎叶以及根部的有机和无机养分,都迅速向穗部转移,转移的速度,以叶最快,茎和叶鞘次之,根再次之。当叶片制造的养分不能及时供应时,积蓄在茎和叶鞘中的养分才被动用。输送到颖花 First, the type of empty noodles and the causes of rice out of the ear after the accumulation of stems and leaves and roots of organic and inorganic nutrients, are rapidly transferred to the spike, the transfer rate to leaves the fastest, followed by the stem and leaf sheath, roots Again. Nutrients accumulated in stems and leaf sheaths are not used until the nutrients they make can not be supplied in time. Conveying to the spike