不同密度油松天然次生林对林下植被组成和土壤物理性质的影响  

Effects of Different Densities on Understory Vegetation Composition and Soil Physical Properties in Natural Secondary Pinus Tabulaeformis Forests

作　　者：朱明英 Zhu Mingying(National Forest Administration Bureau of Guandi Mountain in Shanxi Province,Wenshui 032100,China)

机构地区：[1]山西省关帝山国有林管理局,山西文水032100

出　　处：《山西林业科技》2024年第2期31-32,64,共3页Shanxi Forestry Science and Technology

基　　金：2021年中央财政林业科技推广示范项目(晋[2021]TG09号)。

摘　　要：以山西省关帝山国有林管理局三道川林场4种不同密度油松天然次生林为研究对象,调查分析了其林下植被组成及土壤物理性质随林分密度的变化规律。结果表明,油松天然次生林林下共出现植物32科64属70种。随着林分密度的增大,林下灌木层和草本层物种组成发生变化,物种数量呈现减少趋势;不同土层的土壤容重均呈现增大趋势,土壤最大持水量、毛管持水量呈现减小趋势。综合来看,为改善油松天然次生林林下植被组成及土壤物理性质,可适当降低林分密度。The changes in understory vegetation composition and soil physical properties with stand density were investigated and analyzed,with 4 different density natural secondary Pinus tabulaeformis forests at Sandaochuan Forest Farm of National Forest Administration Bureau of Guandi Mountain in Shanxi Province as object.The results showed that there were a total of 70 species of plants belonging to 64 genera and 32 families in the natural secondary Pinus tabulaeformis forest.As the forest density increased,the species composition of the understory shrub and herbaceous layers changed and the number of species showed a decreasing trend.The soil bulk density of different soil layers showed a increasing trend,while the maximum soil water holding capacity and capillary water holding capacity showed a decreasing trend.Overall,in order to improve the vegetation composition and soil physical properties under natural secondary Pinus tabulaeformis forests,the stand density could be appropriately reduced.

关 键 词：林分密度 油松天然次生林 植被组成 土壤物理性质 

分 类 号：S791.254[农业科学—林木遗传育种]