| 海拔和造林密度对马占相思人工林生长的影响 |
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| 引用本文： | 王锋.海拔和造林密度对马占相思人工林生长的影响[J].广东林业科技,2014,30(1):42-45. |
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| 作者姓名： | 王锋 |
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| 作者单位： | 广东省龙眼洞林场 广东广州 510520 |
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| 摘 要： | 以1994年种植在广东省龙眼洞林场的马占相思人工林为材料，调查5，10和15a生的树高、胸径和蓄积量，研究海拔和造林密度对生长量的影响。结果表明，海拔（0～500mm）对马占相思胸径生长无显著影响，但对5a生的树高、5和10a生的蓄积量有显著影响，其中250m〈海拔≤500m时的林分蓄积量最大；3种造林密度（800，1335和1998株／hm^2）对树高、胸径和蓄积量有较大影响，以造林密度为1335彬hm^2的林分蓄积量增长最快。林分内存在不同程度的海拔与造林密度交互作用，这种互作对胸径和蓄积量的影响逐年增强．但在15a生时对树高的影响已．不鼹薯．
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| 关 键 词： | 马占相思 人工林 海拔 造林密度 生长性状 |
| 收稿时间： | 2013/10/9 0:00:00 |
| 修稿时间： | 2013/12/31 0:00:00 |
Effects of Altitude and Density on Growth of Acacia mangium Plantations |
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| wang feng.Effects of Altitude and Density on Growth of Acacia mangium Plantations[J].Forestry Science and Technology of Guangdong Province,2014,30(1):42-45. |
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| Authors: | wang feng |
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| Institution: | WANG Feng (Longyandong Forest Farm of Guangdong Province, Guangzhou, Guangdong 510520, China) |
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| Abstract: | An investigation was performed on Acacia mangium plantations planted at Longyandong Forest Farm of Guangdong province in 1994. Height, diameter at breast height （DBH） and growing stock were measured at 5, 10 and 15 years old to study the effects of altitude and density on growth ofA. rnangium. The results showed that under the altitude condition from 0 to 500 m, the altitude did not have significant effect on DBH growth, but had obvious influences on height at 5 years old and growing stock at 5 and 10 years old. The forest stands at altitude 〉250 m and ≤500 m had the highest growing stock. Three kinds of density （800,1 335 and 1 998 trees per hectare） were found to have apparent impacts on height, DBH and growing stock, and the density of 1 335 trees per hectare yielded the highest growing stock. Additionally, different degrees of altitude-by-density （ABD） interactions were observed among A. mangium plantations. An increasing trend of ABD interaction was found for both diameter growth and growing stock increment, but the effect on height at the age of 15 was no longer significant. |
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| Keywords: | Acacia mangium plantation altidude density growth traits |
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