| 摘要: |
| 明确不同来源良种尾巨桉（Eucalyptus urophylla×E. grandis）无性系DH32-29苗木造林后幼龄阶段（1~3年）的生长差异，为优质苗木选择和提质增产增效提供科学理论依据。以来源清楚的尾巨桉DH32-29苗木（BG）和来源不清的尾巨桉DH32-29苗木（NBG）造林林分为研究对象，比较研究广西西北部、中部及南部3个区域不同苗木造林林分的胸径、树高、生物量、碳储量及生产力的差异性。结果表明：林龄2a、3a时，BG林分中尾巨桉平均胸径、单株生物量、单株碳储量及单株生产力均显著高于NBG林分（P＜0.05）；BG林分乔木层生物量、碳储量及生产力整体高于NBG林分，在1a生时差异较小，2a生时差异增大，但未达显著水平（P＞0.05），3a生时差异达极显著水平（P＜0.01）。研究表明，采用来源清楚的优质苗木造林增产效果更明显。 |
| 关键词: 尾巨桉，幼龄林，优质种苗，胸径，生产力 |
| DOI： |
| 投稿时间：2023-12-23修订日期：2024-03-13 |
| 基金项目:广西自然科学(2023GXNSFBA026328, 2023GXNSFAA026415),国家自然科学(32160358,32360284)资助。 |
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| Comparative Study on Afforestation Growth of Eucalyptus urophylla×E. grandis Seedlings from Different Sources |
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XU Junmo1, WEN Yuanguang1, HUANG Yongjie1, Chen Jinlei1, Chen Qiuhai1, WEN Jun2, WU Yanlin3, Lin Jian4, ZHOU Xiaoguo1
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| (1.Institute of Eco-Environment Research,Guangxi Academy of Sciences,Nanning,Guangxi;2.Institute of Ecological Industry,Guangxi Academy of Sciences,Nanning,Guangxi;3.College of Forestry,Guangxi University,Nanning,Guangxi;4.Nanning Arboretum,Nanning,Guangxi) |
| Abstract: |
| To clarify the growth differences in the young stage (1 ~ 3 years) of E. urophylla×E. grandis clones (DH32-29) from different sources after afforestation, and to provide a scientific theoretical basis for the selection of high-quality seedlings and the improvement of quality, yield and efficiency. The differences in DBH, tree height, biomass, carbon storage, and productivity of different afforestation stands of E. urophylla×E. grandis seedlings DH32-29 with clear sources (BG) and E. urophylla×E. grandis seedlings DH32-29 with unclear sources (NBG) were compared in three regions of northwest, central, and southern Guangxi. The results showed that at the age of 2a and 3a, the average DBH, individual tree biomass, individual tree carbon stock and individual tree productivity of E. urophylla×E. grandis in BG stand were significantly higher than those in NBG stand (P < 0.05). The stand biomass, stand carbon storage and stand productivity of arbor layer in BG stand were overall higher than those in NBG stand, and the difference was small at 1a, but increased at 2a, but did not reach significant level (P > 0.05), and reached extremely significant level at 3a (P < 0.01). The results showed that afforestation with high-quality seedlings from clear sources has a more significant yield increase effect. |
| Key words: E. urophylla×E. grandis, young forest, high-quality seedling, DBH, productivity |
