不同修剪强度对樟树生长的影响

Effect of different pruning intensity on camphor tree growth

通过完全随机试验,分析了不同的修剪强度(a处理为修剪10cm;b处理为修剪20cm;c处理为修剪30cm;d处理为截干)对樟树生长的影响。结果表明,樟树树高的年平均生长量为d处理>b处理>c处理>a处理>CK,说明修剪对樟树树高的生长有明显的促进作用;冠幅年平均生长量也呈现出正相关的趋势,d处理>c处理>a处理>CK>b处理;而各处理对地径的影响没有呈现出明显的规律性。不同的修剪强度对樟树叶重和枝重的增加均有促进作用,并呈现正相关,且a处理<b处理<c处理<d处理。中、高强度的修剪对樟树枝叶生长和生物量的增加均有明显的促进作用。

Completely randomized design was used to observe the pruning intensity （a-pruning 10 cm, b-pruning 20 cm, c-pruning 30 cm and stem-cut） on camphor trees growth. The results showed that different pruning intensity treatments had promotive effect on the camphor tree height annual growth. The tree height increment of the dbccCK proved that pruning played a clear role in promoting camphor tree′s height increment. The crown width growth was also showing a trend of positive correlation, dcbCKb. While the impact of pruning treatments on camphor trees ground diameter did not showing regularity. Furthermore different pruning treatments could increase leaf and branch growth, and showed a positive correlation, the leaf weight of pruning abcd. The moderate and high intensity of pruning would promote the growth of branches and leaves and its biomass increment of Cinnamomum camphor.