施肥处理对相思树种幼林生长的影响

Effects of fertilizing treatments on sapling growth of Acacia plantation

为了研究不同施肥处理对相思树种幼林生长的影响,对相思树种人工幼林进行不同施肥方式和施肥配方试验,观测其胸径、树高及材积生长量的变化。结果表明:基肥不同配方对相思树种幼林胸径、材积的影响差异显著,对树高的影响差异不显著;追肥不同配方对相思幼林生长量的影响差异不显著,但不同树种间幼林生长差异显著。影响相思树种幼林生长的因素主次排序为树种>基肥>追肥。正交设计9个处理间,相思树种幼林生长的树高、胸径、材积都存在显著差异(P<0.05),其中,处理A_(1)B_(2)C_(3)和A_(2)B_(3)C_(3)相思幼林树高最高,处理A_(3)B_(2)C_(2)相思幼林胸径和材积最大。结果为发展相思树种人工造林提供了技术支撑。

In order to reveal the effects of fertilization on the growth of Acacia saplings,experiments were carried out with combinations of Acacia varieties,application methods and fertilizer formulae,recording sapling changes in diameter at breast height(DBH),tree height and volume growth.The result showed that formulae of basal fertilizer significantly influenced DBH and volume growth except height growth;and formulae of surface dressing had no obvious effect on the sapling growth,while there were significant differences in sapling growth among varieties.Factors’effects on the growth were in such a descending order:varieties>basal fertilizing>surface dressing.Among 9 treatments of orthogonal design,there were significant differences in tree height,DBH and volume(P<0.05),and treatment A_(1)B_(2)C_(3)and A_(2)B_(3)C_(3)had highest tree height,A_(3)B_(2)C_(2)had highest DBH and volume.This finding may provide insight for the management of Acacia plantations.