梨树人工疏花,是我县周头大队多年来行之有效的一项增产措施。1974年。在全县范围内推广人工疏花,取得肯定的效果。一、疏花的优点(一)节省养分。梨花为完成雄雌蕊的发育,形成花粉粒和胚珠,需要消耗树体贮藏的大量养分。而在开花、座果和幼果生长阶段,更需大量养分。疏花后这些养分可集中 Lhasa artificial flowers, is my county brigade weeks effective measures to increase production. 1974. In the county-wide promotion of artificial flowers, and achieved positive results. First, the advantages of thinning (a) to save nutrients. Ewha to complete the male and female pistil development, the formation of pollen grains and ovules, need to consume a lot of tree storage of nutrients. In flowering, fruit and young fruit growth stage, but also a lot of nutrients. After the flowering of these nutrients can be concentrated