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水稻的整个生育过程,可以划分为两个时期。前期为叶和分蘖增长的营养生长期,後期为穗的形成和发育的生殖生长期。从理论上讲,这两个时期是以叶的分化完了和幼穗原始体开始形成作为分界的。在生产上也可以圆秆拔节作为分界的标志。这两个生长时期各有不同的特性,前一个时期是替後一个时期积累营养物质的。因此,两者的均衡发展,在确保产量上具有十分重要的意义。
The whole process of rice growth can be divided into two periods. The early vegetative and vegetative growth stages of leaves and tillers, the late formation and development of the spike reproductive growth period. In theory, these two periods demarcated the differentiation of leaves and the initiation of panicle initiation. In the production of round stalk can also be used as a sign of demarcation. The two growth periods each have different characteristics, the previous period is the accumulation of nutrients for a later period. Therefore, the balanced development of both is of great significance in ensuring the output.