论文部分内容阅读
通过调查3种不同人为干扰强度(轻度择伐、重度择伐和皆伐)下次生林林分结构及其冠下红松生长状况,应用全天空照片法测定红松(Pinus koraiensis)顶端的透光孔隙度,分析红松当年高生长量与顶端透光环境的关系。结果表明:以蒙古栎(Quercus mongolica)为建群种的皆伐样地林冠下,林分透光较强,以杂木阔叶林为主的轻度择伐样地和重度择伐样地林冠下,林分透光较弱;对29年生红松生长起主要阻碍作用的是下木层(≥10m)阔叶树;在透光较好的皆伐样地内,红松当年高生长量均比透光较弱的轻度择伐样地和重度择伐样地高,红松当年高生长量与顶端林分透光孔隙度显著正相关(R2=0.516,P<0.01);为促进辽东山区次生林向阔叶红松林正向演替,应调控红松顶端林分透光孔隙度达30%以上。
The top of Pinus koraiensis at the top of Pinus koraiensis was determined by using the method of whole-sky photography by investigating the structure of the stands and the growth of Pinus koraiensis under three different anthropogenic disturbances (mild selective cutting, severe selective cutting and clear cutting) Optical porosity. The relationship between the high growth of Korean pine and the top translucent environment was analyzed. The results showed that under the canopy layer of Quercus mongolica, there was a strong light transmission in the canopy, the light selective cutting plot and the heavily selective cutting plot dominated by mixed broadleaf forest Under the canopy, the light transmission in the stands was weak. The major hindering effect on the growth of the 29-year-old Korean pine was the broad-leaved tree in the lower layer (≥10 m). In the clear- There was a significant positive correlation between the high growth of Korean pine (Pinus koraiensis) and the translucent porosity of the top stands (R2 = 0.516, P <0.01). In order to promote the development of the eastern Liaoning mountainous area Secondary forest to the succession of broad-leaved Korean pine forest, should control the top of Korean pine translucent porosity of more than 30%.