2. The study also showed that light pruning could improve the photosynthetic efficiency of Rosa roxburghii, thus increasing the fruit setting rate. Rosa roxburghii is a cluster shrub with weak bedding and dense branches, forming more lower branches and inner branches, which often leads to poor growth or even death due to poor ventilation and light transmission. Light pruning can improve the ventilation and light transmission conditions of lower and inner branches, improve photosynthetic efficiency and achieve the purpose of main fruit. Pruning Rosa roxburghii in winter only cuts off dead branches, diseased branches and old branches. When pruning old branches, it should be considered that it is beneficial to promote the growth of thick branches, and generally the method of completely cutting off aging branches is not adopted. When pruning in summer, only the strong branches are cored.
3. Rosa roxburghii is a kind of shrub with strong tufting, weak stratification and cluster. The buds of Rosa roxburghii are precocious and germinate and grow immediately after forming in that year. Buds can be divided into main buds and auxiliary buds, and branches usually germinate from main buds, and the growth of branches has no obvious apical advantage. Generally, the middle branches have strong growth potential and large growth, and the branches are self-cutting and grow neatly and uniformly. The fruiting mother branches of Rosa roxburghii are mostly annual branches, and the two-year branches bear less fruits. Results Generally, except the basal node and the apical node, mixed buds were easily formed from the lower part of the mother branch to the upper part, and there were two kinds of fruit branches: single fruit branch and inflorescence fruit branch. Generally, it is a single flower bearing branch, which is a stout bearing branch and can produce inflorescence bearing branches. Inflorescence-bearing branches usually have 3-4 flowers, up to 7 flowers, forming an irregular corymb.