Effects of pruning on growth dynamic and veneer quality of Eucalyptus urophylla×E. grandis

REN Shi-qi; CHEN Jian-bo; DENG Zi-yu; GUO Dong-qiang; LIU Yuan; HUANG Ming-jun; MENG Jiang-long; XIAO Wen-fa; XIANG Dong-yun

doi:10.13332/j.1000-1522.20140228

Journal of Beijing Forestry University > 2015 > 37(3): 126-132. > DOI: 10.13332/j.1000-1522.20140228

REN Shi-qi, CHEN Jian-bo, DENG Zi-yu, GUO Dong-qiang, LIU Yuan, HUANG Ming-jun, MENG Jiang-long, XIAO Wen-fa, XIANG Dong-yun. Effects of pruning on growth dynamic and veneer quality of Eucalyptus urophylla×E. grandis[J]. Journal of Beijing Forestry University, 2015, 37(3): 126-132. DOI: 10.13332/j.1000-1522.20140228

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Effects of pruning on growth dynamic and veneer quality of Eucalyptus urophylla×E. grandis

1.
1 Guangxi Forestry Research Institute, Nanning, Guangxi, 530002, P. R. China
2.
2 Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing, 100091, P. R. China
3.
3 Guangxi State-owned Gaofeng Forest Farm, Nanning, Guangxi, 530002, P. R. China
4.
4 Huashan Mountain Forest Farm in Huanjiang Maonan Autonomous County, Huanjiang, Guangxi, 547100, P. R. China.

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Received Date: July 10, 2014
Revised Date: October 30, 2014
Published Date: March 30, 2015

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Abstract

Abstract

Using Eucalyptus urophylla×E. grandis plantation as the research material in this paper, the effects of pruning on the growth dynamic and veneer quality were studied by setting four pruning intensities of CK (no pruning), light pruning (cut 25% of the whole canopy), moderate pruning (cut 33.3% of the whole canopy) and heavy pruning (cut 50% of the whole canopy), and pruning in consecutive 2 years with applying split-plot experiment design. The results showed that the growth of young E. urophylla×E. grandis was most influenced by pruning intensity, especially with the increasing of trees age. The increase of diameter at breast height (DBH) was affected under the principle of nearby allocation of biomass; however the growing on the height of tree was affected quite less than that for DBH. The reason of this phenomenon was mainly related to the height of canopy and net photosynthetic rate after pruning. The tree volumes for both bi-monthly continuous and regular growth in 2013 were nearly the same under four pruning intensities after two consecutive pruning in 2011 and 2012. The veneer quality was improved by the heavy pruning, which was able to increase green knots and decrease dead knots per unit area. The heavy pruning is most appropriate method for directive breeding of clear wood based on the growth and veneer quality of E. urophylla×E. grandis.
- pruning intensity,
- Eucalyptus urophylla×E.grandis,
- growth,
- veneer quality

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References

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Effects of pruning on growth dynamic and veneer quality of Eucalyptus urophylla×E. grandis

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