摘要
对杉木种源两次全分布区试验的13、16、18、28年生试验林的生长、材性测定资料进行了研究,结果表明:杉木种源间的树高、胸径、材积、木材比重、形数等性状都存在着丰富的遗传变异,其种源的遗传力在中等以上;以速生优质为目标作综合指数选择,从57个参试种源中,评选出福建崇安、建瓯、浦城、贵州锦屏、广西融水、福建武平、南平7个优良种源,其中广西融水、贵州锦屏、福建南平为稳定性好种源,在13年生时其材积遗传增益为417%～823%,在28年生时,其树高、胸径、材积现实增益分别为77%～156%、99%～309%、308%～911%;生长性状与木材比重无显著的表型相关,但两者遗传相关呈负向,随林龄增加达到高度负相关,生长性状的改良有降低木材比重的趋势;广西融水、贵州锦屏等优良种源早期就表现出速生性,而福建崇安、浦城、建瓯等武夷山闽西北山地种源,前期速生性并不十分显著,随林龄增大,其生长速率加快,直径生长尤为突出,具有巨大的生产潜力,更适合在浙江省推广应用。杉木种源研究应延续到半个轮伐期以上。
Study on growth and wood properties of 13,16,18 and 28-year Cunninghamia lanceolata forest from full range provenance trial showed that tree height, DBH, volume and specific gravity of wood had great genetic variation among provenances. For the purpose of fast-growing and wood quality as selection index, 7 plus provenances were selected from 57 tested provenances. Rongshui of Guangxi, Jinping of Guizhou and Nanping of Fujian of the 7 plus provenances had advantage of stability, their genetic gains of 13-year volume reached 41.7%-82.3%, and 28-year genetic gains of height, DBH and volume were respectively 7.7%-15.6%, 9.9%-30.9% and 30.8%-91.1%. Their growth performance and wood specific gravity had no significant phenotypic correlation, but their genetic correlation was negative. Improvement of growth traits had trend to decrease wood specific gravity. Rongshui of Guangxi and Jinping Guizhou showed fast-growing trait in the early stage. While Chong＇an, Pucheng and Jian＇ou of Fujian had fast-growing traits with the age, especially the diameter growth. The experiment resulted that provenances from Fujian showed the advantage of high yield, and were the better choice for plantation in Zhejiang province.
出处
《浙江林业科技》
北大核心
2010年第5期24-32,共9页
Journal of Zhejiang Forestry Science and Technology
基金
浙江省重大科技攻关项目"珍贵用材树种优良品系快繁中试及容器苗工厂化生产技术集成示范"(2008C02004-3)
关键词
杉木
种源
速生优质
现实增益
遗传增益
Cunninghamia lanceolata
provenance
fast-growing and quality
realized gain
genetic gain
