北美鹅掌楸人工林生长规律及早期选择可行性探究
[目的]北美鹅掌楸为优良的珍贵用材树种，研究其生长发育规律及生长性状早晚期相关对于北美鹅掌楸人工林高效培育有重要的指导意义。[方法]本文利用树干解析的方法对江苏句容24年生的北美鹅掌楸人工林生长规律研究，并在此基础上进行胸径、树高和材积性状的年年相关分析以及早期选择效率评价。[结果]研究结果表明：北美鹅掌楸胸径、树高从6a进入快速生长期，持续到17a，而材积则在1～10a增长缓慢，12a后进入速生期，生长速率在20a达到最大，22a后逐渐降低，林分接近数量成熟。生长性状的年年相关及早期选择效率分析结果表明：胸径、树高在6a与18a显著相关，材积在6a与16a达到显著相关，且此时选择效率最高；若...
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| Published in | 林业科学研究 Vol. 30; no. 5; pp. 878 - 885 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
南京林业大学南方现代林业协同创新中心,江苏南京,210037%南京林业大学下蜀实习林场,江苏句容,212400
2017
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-1498 |
| DOI | 10.13275/j.cnki.lykxyj.2017.05.023 |
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| Summary: | [目的]北美鹅掌楸为优良的珍贵用材树种，研究其生长发育规律及生长性状早晚期相关对于北美鹅掌楸人工林高效培育有重要的指导意义。[方法]本文利用树干解析的方法对江苏句容24年生的北美鹅掌楸人工林生长规律研究，并在此基础上进行胸径、树高和材积性状的年年相关分析以及早期选择效率评价。[结果]研究结果表明：北美鹅掌楸胸径、树高从6a进入快速生长期，持续到17a，而材积则在1～10a增长缓慢，12a后进入速生期，生长速率在20a达到最大，22a后逐渐降低，林分接近数量成熟。生长性状的年年相关及早期选择效率分析结果表明：胸径、树高在6a与18a显著相关，材积在6a与16a达到显著相关，且此时选择效率最高；若以24a为伐期年龄早晚相关分析，胸径、材积在16a与24a生长量达到显著相关水平，而树高则为14a。[结论]北美鹅掌楸胸径、树高早期增速较快，进入中壮龄阶段竞争加剧，个体间分化增大。随着林分年龄的增长，研究获得的早期选择年龄也相应地延迟。从加速育种角度，在6a进行早期选择较为合理，而在培育大径材北美鹅掌楸方面可以16a之后再进行疏伐选择。 |
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| Bibliography: | Liriodendron tulipifera; stem analysis; growth pattern; age-age correlation; early selection [ Objective] To study the growth pattern of Liriodendron tulipifera. [ Method] A 24-year-old L. tulipifera plantation in Jurong of Jiangsu Province was used to study its growth pattern by means of stem analysis, and the ageage correlation of growth traits such as diameter at breast height （ DBH）, tree height and volume were explored. [ Result ] The results of stem analysis showed that, for DBH and tree height growth, the rapid growth period of L. tulipifera lasted for 12 years （the 6th to 17th year after planting）, while the early growth of timber volume of L. tulipifera was slow in the period of the first year to the tenth year. After 12 year, the volume increased quickly, and reached the peak value at 20th year. The results of age-age correlation and early selection efficiency analysis showed that, for the DBH and tree height, the growth in the 6th year were significantly correlated with the growth in the 18th year, |
| ISSN: | 1001-1498 |
| DOI: | 10.13275/j.cnki.lykxyj.2017.05.023 |