修枝强度对辽东栎林分生长和林下物种多样性的短期影响

Short-term Effects of Pruning Intensity on Growth and Understory Species Diversity of Quercus Liaotungensis Forest

在山西省中条山国有林管理局三交中心林场的辽东栎天然次生林中设置4个修枝强度处理,3年后,通过比较林分生长情况和林下物种多样性的变化来研究不同修枝强度对辽东栎林的影响。结果表明,重度修枝能够显著提高林分胸径年增长量、树高年增长量、胸径断面积年增长量、蓄积量、蓄积量总增长量和蓄积量年增长量。灌木层和草本层物种数随着修枝强度的增加而增加,中度修枝和重度修枝比轻度修枝更能增加辽东栎林下物种多样性。因此,在生产实践中建议对辽东栎天然次生林进行重度修枝。

4 pruning intensity treatments were set up in the Quercus liaotungensis natural secondary forest in Sanjiao Forest Farm of National Forest Administration Bureau of Zhong tiao Mountain in Shanxi Province.3 years later,the effects of different pruning intensities on Quercus liaotungensis forest were studied by comparing the growth of the stand and the changes in understory species diversity.The results showed that heavy pruning could significantly increase the annual growth of DBH,annual growth of tree height,annual growth of DBH cross-sectional area,volume,total growth of volume and annual growth of volume of Quercus liaotungensis stand.The species of shrub and herb layers increased with the increase of pruning intensity,moderate pruning and heavy pruning could increase species diversity under Quercus liaotungensis forest more than light pruning.Therefore,it was recommended to conduct heavy pruning for the natural secondary forest of Quercus liaotungensis in production practice.