夏季修剪与化学控制对梨树新梢生长及成花的影响

Effects of Summer Pruning Techniques and Chemical Controlling on Shoot Growth and Flower Bud Formation of Pear Tree

对黄冠和丰水梨幼树进行夏季修剪(摘心、拉枝和扭梢)和化学控制(喷施不同浓度PP333和CCC),调查其新梢生长量及成花率。结果表明:各种修剪方法均能不同程度地抑制新梢的生长,提高成花率。其中,生长延缓剂抑制生长的效果随着药液浓度的升高而增加;拉枝提高成花率的效果最明显,成花率可达70%～80%。

Shoot growth and flower bud formation rates of Huangguan（Pyrus prifolia Nakai）pear and Hosui pear of young trees were investigated after summer pruning（pinching,shoot bending and shoot twisting）and chemical controlling（spraying different concentrations of PP333 and CCC）.The results showed that all pruning treatments inhibited pear shoot growth and promoted flower bud formation rates with different degrees.The effects of growth inhibitors on shoot growth were strengthened with increasing of medicament concentrations.The effect of shoot bending on flower bud formation rate was the most obvious,its flower bud formation rate was from 70 percent to 80 percent.