Abstract:

In order to study the effects of pruning on the growth of Betula alnoides, compared pruned alnoides and unpruned one, a contrast test had been designed on the basis of Laoshan forestry station of Betula Alnoides in Baise City, Guangxi Province, using the sample survey measures. The data had been analyzed to find out pruning’s impacts on alnoides growth. The results showed that: pruning’s impacts on crown diameter growth varied a lot. It could narrow the crown while had little effect on the growth of both diameter at brest height (DBH) and tree volume. It could also hinder the growth of tree height. Pruning was extremely unfavorable for 4-year-old alnoides in that the tree height and volume growth could be affected.