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思茅松人工林不同空间配置模式下不同密度生长试验与分析(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2015年01期
Page:
162-166
Column:
研究简报
publishdate:
2015-01-30

Article Info:/Info

Title:
Study on planting density of Pinus kesiya var. langbianensis plantation under different spacial allocation modes
Article ID:
1000-2006(2015)01-0162-05
Author(s):
XU Yumei1 YANG Dejun1* SHI Fuqiang2 XU Linhong1 LIU Yonggang1 CHEN Wei1 CHEN Shao’an1
1. Yunnan Academy of Forestry, Kunming 650201, China;
2. Pu’er City Forestry Institute of Yunnan Province, Pu’er 665000, China
Keywords:
Pinus kesiya var. langbianensis assembled allocation square allocation rectangle allocation planting density
Classification number :
S723
DOI:
10.3969/j.issn.1000-2006.2015.01.029
Document Code:
A
Abstract:
A twelve years old Pinus 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.

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Last Update: 2015-01-31