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辽东栎的生长速度对木材密度的影响
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摘要:
研究辽东栎的生长速度及生长轮年龄对密度的影响。结果表明,生长轮年龄是决定木材性质的主要因子,生长速度对木材密度的影响较小。而生长速度对密度的影响又随年轮宽度、生长轮年龄及取样部位(早材,晚材或整个年轮)而异。
关键词:  辽东栎,生长速度,生长轮年龄,密度
DOI:
基金项目:
EFFECTS OF GROWTH RATE ON WOOD BASIC DENSITY OF EAST-LIAONING OAK(O. liaotungensis Koidz. )
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Abstract:
The experiment was conducted to study effects of growth rate on wood basic density of East-Liaoning Oak(Q. liaolungensis Koidz.)from the Zhongtiao Mountains, the North China. Four distinct ring width classes made up thegrowth rate, which is further grouped into two types according to the sourcesof materials for ring width classes. One is from different radius lengths withina individual breast-height disk, and the other from trees with different averagering widths. Results indicate that growth ring age is a main factor controlling wood basic density, growth rate has fewer effects than growth ring age. Twotypes of growth rate actually show same effects on besic density, and the effec-ts are varied with not only the unite of sample (early wood, late wood or who-le ring) but ring width and growth ring age. Effects of growth rate on basic density of early or late wood are nonsignificant,but it shows greater effects on basic density of the whole ring. Basic density apparently increases with increasing rin width within the limits of narrow ring width. When ring width is larger than a fixed value--1. 5mm, basic density is less increased with increasing ring width, almost keepinga constant value more or less. Growth rate has a few effects on juvenile wood basic density. But the effectsgradually increas with increasing growth ring age, on mature wood basic densitygreater effects are found.
Key words:  Quercus liaotungensis Koidz,Growth rate (ring width),Growth ring age,basic density

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