论文部分内容阅读
水稻幼穗分化有着内在的自然规律,了解这一过程的发生与发展,对于品种布局,茬口安排、秧龄及田间肥、水管理和促控等,都具有重要的理论与实践意义。穂分化过程水稻叶与穗都是由茎顶端生长点分化而来,先分化叶原基,后由叶原基生长出叶片。当植株发育到一定阶段,在茎的分生组织内发生了一次质的转变,停止叶原基分化,而分化出幼穗突起。 (一)穂分化过程水稻从开始分化幼穂到抽穗,总称为长穗期。从茎端分生组织分化出最原始的幼穗突起,到长成一个稻穗,要经历一系列分化阶段,从生产实际出发,可简划为四个时期:
The panicle differentiation of rice has inherent laws of nature. Understanding the occurrence and development of this process has important theoretical and practical significance for the distribution of varieties, arrangement of stubble, seedling age and field fertilizer, water management and promotion of control.穂 Differentiation Rice leaves and spikes are differentiated from the top growing point of the stems by differentiating leaf primordia and then growing leaf leaves by primordial leaves. When the plants developed to a certain stage, a qualitative transformation took place in the meristems of the stems, the differentiation of leaf primordium was stopped, and the young spikes were differentiated. (A) 穂 Differentiation Rice from the beginning of differentiation of young 穂 to heading, collectively known as the long panicle. From the apical meristem differentiation of the most primitive spikelets to grow into a panicle, to go through a series of stages of differentiation, starting from the actual production can be briefly divided into four periods: