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穗数、粒数及千粒重是构成产量的三个因素,在这三个因素中,穗数是基础,当穗数已达到充分发挥本品种最大增产潜力时,继续提高产量就需要提高穗重(包括粒数和粒重)。因此,研究幼穗发育规律,促进穗大粒多,提高结实率,对增加穗重有着重要意义。近几年来,我们在豫北,豫中西地分别观察了郑引一号、百泉41两个品种的幼穗发育规律及其与外部形态的相关性,现总结如下:
Spike number, grain number and 1000-grain weight are the three factors that make up the yield. Among these three factors, the number of spikes is the foundation. When the spike number has reached the maximum yield potential of this variety, it is necessary to increase the spike weight Including grain number and grain weight). Therefore, studying the law of young panicle development, promoting large spikelets, increasing seed setting rate is of great significance to increasing panicle weight. In recent years, we observed the law of panicle development and the correlation with the external morphology of Zheng-Yin-1 and Ba-Quan-41 in the north of Henan,