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修枝强度和季节对杨树人工林生长的影响(PDF)

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

Issue:
2000年06期
Page:
6-10
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
Effects of Pruning Intensities and Pruning Seasons on the Growth Dynamics of the Poplar Plantation
Article ID:
1000-2006(2000)06-0006-05
Author(s):
FANG Sheng zuo 1XU Xi zeng 1YAN Xiang jin 2DENG Jian guo 3
1.Nanjing Forestry University, Nanjing 210037, China;2.The Multi management Bureau of Siyang Jiangsu Province,Siyang 223700,China;3.The Farm of Siyang Jiangsu Province,Siyang 223700,China
Keywords:
Poplar plantation Pruning intensity Pruning season Growth dynamics
Classification number :
S718
DOI:
10.3969/j.jssn.1000-2006.2000.06.002
Document Code:
A
Abstract:
The effects of pruning intensities and pruning seasons on the growth dynamics and the number of epicormic branches produced for a clone I-69 plantation were evaluated at Siyang Farm, Siyang County, P.R.China. Experimental treatments applied in a split plot design included: three pruning intensities (1/3 H , 1/2 H and CK), and two pruning seasons (growing season and non-growing season). Results indicated that difference in leaf area index (LAI) between the pruning intensities was manifested in the year after pruning. The LAIs of middle pruning intensity (1/2 H ) and slight pruning intensity (1/3 H ) were only 49% and 84% of the CK (unpruned trees) respectively. There was no significant difference in DBH and single-tree volume between two pruning seasons and three pruning intensities at 4 years after pruning. However, the number of epicormic branches was affected considerably by the pruning seacons. The number of epicormic branches in the stands pruned in non-growing season was 79.8% higher than that in growing season. The tree height of non-adhering knot was significantly affected by the pruning intensities at 4 years after pruning, 6.0m for the stand with middle pruning intensity, about 4.5?m for the slight pruning intensity and only 2.0?m for the unpruned stand.

References

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Last Update: 1900-01-01