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本文就杂交水稻在制种过程中的花期相遇问题进行了探讨,初步结论如下:1、水稻主茎叶龄并不是固定不变的,它和播种期、插秧期、栽培密度、施肥数量和时期以及缓苗状况等等都有关系。因此绝不能用平均叶龄做为错期的依据。本文并推算出在本地区的自然条件下各个品种的基本营养生长叶片数和可消营养生长叶片数,可供制种田保持适宜叶龄差距的参考。2、结合地区的具体条件,经过实验考察,本文提出了鉴别幼穗发育进程的一系列简便方法。3、本文讨论分析了影响抽穗速度的因素,提出了解决方法,并阐述了一般的开花规律。4、抽穗开花期的早晚,是基本营养生长性与可消营养生长性的强度以及叶片生长速度的综合结果。促进花期相遇的基本措施是:保持插前合理的叶龄差距;缩减生育过程中的可消营养期;控制好叶片生育速度,并提出了相应地保持、缩减和控制的方法。
The main conclusions are as follows: 1. The main leaf age of rice is not constant, and it is closely related to sowing date, planting date, planting density, quantity and period of fertilization As well as Huanmiao status and so on are related. Therefore, we must not use the average leaf age as the basis for the wrong time. In this paper, the number of vegetative growth blades and the number of vegetatively vegetative growth leaves of all cultivars under natural conditions in the region are deduced, which can be used as a reference to maintain the appropriate leaf gap for farming. Combined with the specific conditions in the area, through experimental investigation, this paper presents a series of simple methods to distinguish the process of young panicle development. The paper discussed and analyzed the factors that affect the speed of heading, put forward the solution, and expounded the general law of flowering. 4, heading and flowering sooner or later, is the basic nutritional growth and elimination of vegetative growth intensity and leaf growth rate of the combined results. The basic measures to promote the flowering period are as follows: maintaining a reasonable leaf age gap before insertion; reducing the nourishing period in the process of reproduction; controlling the growth rate of the leaf and proposing the methods of maintaining, reducing and controlling accordingly.