施肥和修枝对巨尾桉幼林生长的影响

Effect of Fertilizers and Pruning Intensity on Growth of Eucalyptus grandis×E.urophylla

为探索不同肥料种类和修枝强度对桉树幼林生长的影响,设置肥料种类和修枝强度的2因素2水平试验。结果表明:肥料种类和修枝强度处理组合对胸径生长影响表现为显著差异;在修枝情况下,施放固态肥比液态肥更有利于胸径的生长。肥料种类和修枝强度处理组合对树高生长的影响差异不显著,综合考虑胸径和树高生长,应对林木进行适当的修枝处理以获得更多无节良材。进一步考虑营林成本,应采用修枝+固态肥的营林方式培育高干桉树无节良材。

In order to explore the effect of different fertilization types and pruning intensities on the growth of young Eucalyptus plantations,a factorial trial involving 2 factors each at 2 levels was established and assessed for diameter at breast height(DBH)and tree height(HT).The results showed that there were significant differences for DBH among the treatments.In pruned treatments,increases in DBH with solid fertilizer were larger than with liquid fertilizer.In contrast,no significant differences in HT were found among treatments.Considering growth of DBH and HT,we should prune tree branches of Eucalyptus plantations for more clear wood,and in combination with such pruning it is better to use solid fertilizer to cultivate long clear wood in such plantations.