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早稻品种的主茎总叶数一般为10—13片,不同叶位的稻叶,其生理功能与稻株生长发育有着密切的内在联系.在水稻科研与生产中,常按稻叶功能的不同,把水稻主茎叶片分成若干组(将功能类似的稻叶划归一组),称“叶层分组”.由于水稻主茎上最后三片叶(即倒数1—3叶)在稻穗分化形成过程中出生,抽穗后它们又主要担负了结实期物质积累的功能,因此将这组叶称为生殖生长叶(简称生殖叶).
The main stem of early rice varieties with the total number of leaves is generally 10-13 pieces of rice leaves at different leaf positions, its physiological function and rice plant growth and development are closely linked.In rice research and production, often according to different rice leaf function , Divided the main stem leaves of rice into several groups (grouped into similar groups of rice leaves), and called “leaf grouping.” Since the last three leaves on the main stem of the rice They were born during the process of differentiation and formation of rice panicles. After heading, they mainly bear the function of material accumulation during grain-filling period. Therefore, this group of leaves is called reproductive growth leaf.