水曲柳、胡桃楸、黄波萝硬阔叶混交林树种组成调整技术研究

Adjusting the Tree Species Composition of Hardwood Broad-leaved Mixed Forests of Fraxinus mandshurica,Juglandis mandshuricae and Phyllostachys sulphurea

以小兴安岭水曲柳、胡桃楸、黄波萝硬阔叶混交林为研究对象,在对林分进行不同强度的抚育采伐,改变其原有的树种组成和林分结构,5a后对林分的生长进行测定。结果表明,小兴安岭水、胡、黄硬阔叶混交林的最佳的抚育强度为弱度采伐,即株数采伐强度在20%左右,蓄积采伐强度在25%左右,该林分5a内林分的公顷蓄积增加了32.25 m3·hm-2,年平均增加6.45 m3·hm-2,该结论有助于提高小兴安岭林区水、胡、黄硬阔叶混交林的分类经营水平。

Tree species composition and stand structure of hardwood broad-leaved mixed forests of Fraxinus mandshurica, Juglandis mandshuricae and Phyllostachys sulphurea were changed by tending cuttings with different intensities. Relative parameters were measured 5 years after the cutting to examine the influence of tending cutting on the quality of the forest stands. The results showed that, the best cutting intensity was the weak felling, namely, 20% for number cutting intensity, and 25% for accumulation cutting intensity, by which the stock accumulation increased by 32.25 m^3·hm^-2 with an average annual increase of 6.45 m^3·hm^-2. This conclusion is helpful to improve the classification management level of the hardwood broad-leaved mixed forests in the Xiaoxingan Mountains.