摘要
通过疏株、疏茎、疏小穗小花，剪叶、剪芒和穗部、叶片徐布植物生长调节剂等多组试验，明确了本生态条件下小麦抽穗开花后的光合同化量是粒重的主要决定因素。同一植株主茎对分蘖、同一穗基部小穗对上部小穗以及同一小穗基部小花对上部小花，在养分征集上有竞争优势，消除这种优势可以提高粒重及籽粒均匀度。
A group of experiments were carried out to study the limiting factors to wheat grain weight(G W)by deleting plants or shoots, thinning spikelet or floret,cutting off leaves or/awn,painting plant growth regulators on ear or flag leaf after heading.The results showed that photo-synthetic assimilation after flowering is most important for determination of GW. There exists some dominance in nutrient competition,with main stem over tillers,spikelets in lower position of ear over those in upper position and basic florets over apical ones.
基金
浙江省科委"八五"重点课题
关键词
小麦
粒重
养分
库源关系
Triticum aestivum,L.
grain weight
nutrient
sink-source relationship
