桃树土施多效唑时期和方法研究

Effects of Paclobutrazol with Different SoilApplication Methods and the Timingon the Growth of Peach Trees

试验比较了秋季和春季土施多效唑,以及春季不同方式土施多效唑对桃树生长的影响.秋季施用和翌春开始生长前施用多效唑都能显著地抑制新梢生长,处理间差异不显著,前者的抑制作用出现比春季施用早一周.环状沟施效果不如树冠下均匀撒施和环状沟灌.建议桃树土施多效唑应在冬前施入,采取树冠下均匀撒施的方式.

Experiments were conducted for studing the effects of paclobutrazol on the growth of peach trees. The comparison was made between the fall and the early spring applications. Comparison was also made among the different methods of soil application. All the treatments of paclobutrazol made in the fall and in early spring effectively inhibited the tree growth in the same extent, although, the inhibitory effect was detected one week earlier in the fall application than in the spring. Both the method of paclobutrazol spreading under the tree canopy and the soil drench along the surrounding furrow under the tree showed the better response than the soil application along the surrounding furrow without irrigation, but there was no difference between these two formers. Practical recommandations were given.