摘要
以12年生思茅松人工林为研究对象,采用标准地每木检尺方法,研究3种不同空间配置模式(组合式配置、正方形配置、长方形配置)下不同造林密度对其保存率、树高、胸径、冠幅、单株材积和活立木蓄积量的影响。结果表明:1组合式配置不同密度的树高、胸径、冠幅和单株材积在各处理间均存在极显著差异;区组间胸径和单株材积的分析说明,组合式配置不同密度和立地对其胸径和单株材积有较大的影响,但密度的影响更明显;组合式配置的保存率、树高、胸径、冠幅、单株材积均与密度成反比,活立木蓄积量与密度不成比例。2正方形配置和长方形配置不同密度的树高、胸径、冠幅和单株材积在各处理间均存在极显著差异,区组间差异不显著;不同密度对正方形配置和长方形配置的树高、胸径和单株材积有明显影响,正方形配置的保存率、树高和胸径均与密度成反比,活立木蓄积量与密度成正比,冠幅和单株材积与密度不成比例。3组合式配置培育思茅松大径材最适宜的密度是2 m×2 m×5 m,培育原料林最适宜的密度是1 m×2 m×4 m;正方形配置培育大径材最适宜的密度是2 m×2 m,培育原料林最适宜的密度是1 m×1 m;长方形配置培育大径材最适宜的密度是2 m×3 m,培育原料林最适宜的密度是1 m×2 m。
A twelve years old Pings kesiya var. langbianensis plantation at Qingshuihe of Pu' er city was chosen as the study object in this study. The effects of planting density on survival rate, tree height, DBH, crown width, individual volume and stock volume of three spacial allocation modes ( assembled allocation, square allocation and rectangle allocation) were studied and analyzed by field individual measurements. The results were shown as follows: (1) Extremely significant differences on survival rate, tree height, DBH, crown width and individual volume existed among different planting density with assembled allocation mode. The differences of DBH and individual volume among different blocks were significant at 0.05 level. This study indicated that planting density significantly affected the DBH and individual volume under different assembled allocation. Site condition was also a relevant factor, however, the impact of site condition was not as significant as the planting density. The survival rate, tree height, DBH, crown with, individual volume were all inversely proportional to planting density, however, the stock volume was not proportional to the planting density. (2) As far as the square allocation and the rectangle allocation were concerned, the tree height, DBH, crown width and individual volume of different planting densities were significantly different among different treatments. Under square allocation, the survival rate, tree height and DBH were reversely proportional to the planting density, the stock volume was proportional to the planting density, however, the crown width and individual volume were not proportional to the planting density. (3) Based on the results of this study, it was concluded that under assembled allocation mode, the recommended planting densities for cultivation of large diameter timber and forests of industrial raw material were 2 m×2 m×5 m and 1 m×2 m×4 m, respectively. Refer to the square allocation mode, the proper planting densities for cultivation of large diameter timber and forests of industrial raw material were 2 m×2 m and 1 m× 1 m, respectively, and for rectangle allocation mode, it suggested that planting densities for cultivation of large diameter timber and forests of industrial raw material were 2 m×3 m and 1 m×2 m, respectively.
出处
《南京林业大学学报(自然科学版)》
CAS
CSCD
北大核心
2015年第1期162-166,共5页
Journal of Nanjing Forestry University:Natural Sciences Edition
基金
云南省林业科技推广项目(201310020)
关键词
思茅松
组合式配置
正方形配置
长方形配置
密度效应
Pinus kesiya var. langbianensis
assembled allocation
square allocation
rectangle allocation
planting density