| 尾叶桉萌芽林留条数量对生长和产量的影响 |
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| 引用本文： | 杨曾奖,徐大平,江松远,温记贤.尾叶桉萌芽林留条数量对生长和产量的影响[J].林业科学研究,2002,15(5):582-587. |
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| 作者姓名： | 杨曾奖 徐大平 江松远 温记贤 |
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| 作者单位： | 1. 中国林业科学研究院热带林业研究所,广东,广州,510520
2. 广东省花都市林业局,广东,广州,510000 |
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| 基金项目： | 国家自然科学基金“杉木、桉树人工林长期生产力保持机制研究”(396 30 2 4 )，广州市林业局科研项目“尾叶桉人工林更新及施肥的研究”的内容之一 |
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| 摘 要： | 对 5 5年生尾叶桉实生林砍伐后 ,保留不同萌条数量对其萌芽林生长和产量的影响开展了研究。结果表明 ,定株使桩的存活率明显下降 ,特别是保留单株 ,但保留一定的株数却有利于萌芽林的生长 ;萌芽林的高、径和单株材积生长随保留株数的减少而显著增加 ;3 5年生单位面积蓄积量和出材率 (顶木 )以保留 3株·桩- 1为最好 ,其次为 4株·桩- 1和 2株·桩 - 1,蓄积量分别为 4 5 4 9、4 4 2 1和4 2 5 1m3·hm- 2 ,分别是对照的 131 7%、12 8 0 %和 12 3.0 % ,出材率 (顶木 )分别是对照的 174 .3%、14 8.6 %和 15 5 .4 %。因此 ,在中等地力 ,种植密度为 3m× 2m的尾叶桉萌芽林 ,以纸浆材和顶木为主要经营目的的林分 ,建议其萌芽林的保留株数为 2 4株·桩 - 1。
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| 关 键 词： | 尾叶桉 萌芽更新 留条数量 生产力 |
| 文章编号： | 1001-1498(2002)05-0582-06 |
| 收稿时间： | 2001/6/25 0:00:00 |
| 修稿时间： | 2001年6月25日 |
The Effect of Coppice Number on Its Growth and Productivityin Second Rotation of Eucalyptus urophylla |
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| YANG Zeng jiang,XU Da ping,JIANG Song yuan and WEN Ji xian.The Effect of Coppice Number on Its Growth and Productivityin Second Rotation of Eucalyptus urophylla[J].Forest Research,2002,15(5):582-587. |
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| Authors: | YANG Zeng jiang XU Da ping JIANG Song yuan and WEN Ji xian |
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| Institution: | The Research Institute of Tropical Forestry, CAF, Guangzhou 510520, Guangdong, China;The Research Institute of Tropical Forestry, CAF, Guangzhou 510520, Guangdong, China;Huadu Forestry Bureau of Guangdong Province, Huadu 510000, Guangdong, China;Huadu Forestry Bureau of Guangdong Province, Huadu 510000, Guangdong, China |
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| Abstract: | The impact of stem number left for each trunk on tree growth and productivity in a second rotation coppice of Eucalyptus urophylla was studied by cutting 5.5 years old plantation in previous rotation. The results showed that the survival rate of coppice was lower in one stem left than 2 5 stem left per trunk. The coppice with less stem or stems would have a higher increment of height, diamter and volume of indivival stem. At year 3.5, the stand volume was the highest (45.49 m3·ha-1) in the treatment with 3 stems left per tree, followed by the treatments with 4 and 2 stems per tree are the second (44.21 m3·ha-1) and third (42.25 m3·ha-1) respectively. They were 131.7%, 128.0% and 123.0% of the stand volume in the control treatment (no thinning for the second rotation coppice), respecively. The pole production for construction were 174.3%, 148.6% and 155.4% of the control treatment, respectively. Therefore, it is suggested that 3 stems per tree should be left on the middle fertility site at the planting spacing 2 m×3 m and 2 4 stems per tree should be left to second rotation coppice of E. ruophylla in south China. |
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| Keywords: | Eucalyptus urophylla coppice regeneration coppice numbers productivity |
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