采伐强度对长白落叶松人工林植物多样性的影响

The Effect of Thinning Intensity on Plant Diversity of Larix olgensis

针对长白落叶松人工纯林植物多样性降低、生态功能衰弱、林地地力减退酸化等问题,本研究采用3种采伐强度(15%、30%、40%)对长白落叶松人工林进行抚育间伐,2年后,对抚育后林分及对照林分的植物多样性进行调查分析。结果显示:随着采伐强度的增加而增大,草本植物和灌木植物种类增多,密度、盖度和平均高增大,间伐强度40%的林分物种密度、盖度和平均高较高,草本植物和灌木植物的群落多样性好,复杂程度高,林下天然更新树种种类较多,平均高较大,建议在长白落叶松人工林近自然经营过程中,对近熟林采用40%强度的抚育间伐。

Aiming at the problem of loss biodiversity,weakened ecological function,and acidification of forest land fertility in the pure artificial forest of Larix olgensis plantation,this study used three cutting intensities(15%,30%,and 40%)for tending and thinning of the artificial forest.After two years,the plant diversity of the tending and control stands was investigated and analyzed.The results showed that as the thinning intensity increased,the number of herbaceous and shrub species increased,and the density The coverage and average height increase,and the species density,coverage,and average height of forests with a thinning intensity of 40%are higher.The community diversity and complexity of herbaceous and shrub plants are good,and there are many natural regeneration tree species under the forest,with a larger average height.It is recommended to use a 40%intensity tending thinning for near mature forests in the near natural management process of Larix olgensis artificial forests.