高强度抚育下油松人工林内树木生长态势分析

Growth Situation of Trees in Pinus tabuliformis Plantation under High Intensity

在辽西干旱地区选择30年生的油松人工林作为研究对象,进行高强度的林下抚育,10年后再进行林下高强度抚育1次,后经过12年的天然更新后调查林间的层次结构以及树木的树高结构、胸径结构分布。结果表明,高强度的抚育可以促使油松林更好地更新,使林间层次明显,形成主林层、演替层、更新层,其中演替层的油松树木在数量、结构上均符合生产实际的需求;整个林分的树高、胸径结构均出现多个高峰,林分结构更加稳定。

A 30-year-old Pinus tabuliformis plantation was selected as a research object in arid areas of western Liaoning Province.High-intensity undergrowth was conducted.After 10 years,high-intensity tending was conducted once under the forest.After 12 years of natural regeneration,the stratum structure and the tree height structure and DBH structure distribution of the trees were investigated.Result shows that the high-intensity tending can promote Pinus tabuliformis plantation to be better renewed,and the forest level is obvious,forming the main forest layer,succession layer and renewal layer.The number and structure of Pinus tabuliformis trees in the replacement layer are in line with the actual production needs;the tree height and DBH structure of the whole forest stand have peaks,and the stand structure is more stable.