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水稻从穗轴分化到抽穗为生长的中期。此期管理的主要目的是,通过科学的肥水管理,促进颖花分化,防止颖花退化,争取穗大粒多,实现水稻高产。 一、高产水稻的穗分化过程 了解水稻在田间群体条件下穗分化过程,是搞好水稻中期管理的必要条件,在高产栽培条件下,水稻幼穗分化和发育过程,大体可分为以下三个阶段:
Rice differentiates from cob to heading stage for growth. The main purpose of the management of this period is to promote the high yield of rice through scientific management of fertilizer and water, promote the differentiation of spikes, prevent the spikelets from degeneration, strive for large spikes and large grains. I. Spike Differentiation of High-yielding Rice To understand the process of spike differentiation of rice under field conditions, it is a necessary condition to improve the medium-term management of rice. Under high-yielding cultivation conditions, panicle differentiation and development of rice can be divided into the following three stage: