Studies on Growth and Wood Property of Six Precious Timber Species

LUO Wen-jian; JIN Guo-qing; HE Gui-ping; FENG Jian-guo; ZHANG Dong-bei; ZHOU Zhi-chun

The 21- to 36-year-old plantations of six precious timber species including Ormosia hosiei, Keteleeria cyclolepis, Bretschneidera sinensis, Phoebe bournei, Machilus pauhoi, and Paramecia lotungensis, which locate in Longquan and Qingyuan of Zhejiang province were selected to study the variation in growth, stem form and wood basic density. Of the six tested species, O.hosiei exhibits larger height and DBH increment, longer fast-growing period in diameter, medium wood basic density and smaller radial variation, and its annual ring width varies from 0.8 1.2 cm, whereas the heartwood proportion by ring width and area being 60.57% and 37.47% respectively. Considering the stem forking characteristic of O.hosiei, timely pruning and wiping away the buds, and appropriate fertilizing at two years after planting are necessary to produce high grade trunk wood with better stem straightness and higher heartwood proportion. The other five species exhibited less stem forking and more straight stem. Ph. bournei is famous for its excellent wood quality with medium wood density, strong growth potential, stable annual increment and narrower crown, indicating that it is more suitable for cultivating as long-period and big-diameter timber, although its growth rate is relatively slow. B.sinensis is more suitable for cultivating as good technological wood, as it exhibits medium growth rate, lower density but smaller radial variation; P.lotungensis is also an excellent precious timber specie with higher wood density and radial uniformity, though its growth rate is medium. K.cyclolepis is a coniferous tree, with fast growth rate in early period and slow rate in late, and its wood density is medium. It is proposed that the fast growing period could be prolonged and radial uniformity of wood density be improved through the enhanced cultivation management. M.pauhoi exhibits medium growth rate, lower density and wood mucous, indicating that it is unsuitable for cultivating as precious timber trees.

1. Management General Station of Forest Seedling of Zhejiang Province, Hangzhou 310020, Zhejiang, China

2. Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China

3. Institute of Forestry of Longquan City, Zhejiang Province, Longquan 323700, Zhejiang, China

4. Experimental Forest Farm of Qingyuan County, Zhejiang Province, Qingyuan 323800, Zhejiang, China

Received Date: 2009-08-06

Abstract: The 21- to 36-year-old plantations of six precious timber species including Ormosia hosiei, Keteleeria cyclolepis, Bretschneidera sinensis, Phoebe bournei, Machilus pauhoi, and Paramecia lotungensis, which locate in Longquan and Qingyuan of Zhejiang province were selected to study the variation in growth, stem form and wood basic density. Of the six tested species, O.hosiei exhibits larger height and DBH increment, longer fast-growing period in diameter, medium wood basic density and smaller radial variation, and its annual ring width varies from 0.8 1.2 cm, whereas the heartwood proportion by ring width and area being 60.57% and 37.47% respectively. Considering the stem forking characteristic of O.hosiei, timely pruning and wiping away the buds, and appropriate fertilizing at two years after planting are necessary to produce high grade trunk wood with better stem straightness and higher heartwood proportion. The other five species exhibited less stem forking and more straight stem. Ph. bournei is famous for its excellent wood quality with medium wood density, strong growth potential, stable annual increment and narrower crown, indicating that it is more suitable for cultivating as long-period and big-diameter timber, although its growth rate is relatively slow. B.sinensis is more suitable for cultivating as good technological wood, as it exhibits medium growth rate, lower density but smaller radial variation; P.lotungensis is also an excellent precious timber specie with higher wood density and radial uniformity, though its growth rate is medium. K.cyclolepis is a coniferous tree, with fast growth rate in early period and slow rate in late, and its wood density is medium. It is proposed that the fast growing period could be prolonged and radial uniformity of wood density be improved through the enhanced cultivation management. M.pauhoi exhibits medium growth rate, lower density and wood mucous, indicating that it is unsuitable for cultivating as precious timber trees.

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Reference (13)

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Studies on Growth and Wood Property of Six Precious Timber Species

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References

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