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8个树种在清新区碳汇造林的早期生长表现
陈先孝1, 张志伟2, 陈智雄2
1.广东清新白湾省级自然保护区管理处;2.广东省清新区林业局
摘要:
通过采用随机块状混交的方式进行造林试验，并且采用样方调查方法观测各树种保存率、树 高、胸径和冠幅来研究 8 个树种在广东省清远市清新区碳汇造林的早期生长表现。结果表明，米老 排 Mytilaria laosensis、千年桐 Vernicia montana 保存率在 90% 以上，生长也最快，第 3 年生平均树高 在 3.0 m 以上，平均胸径分別为 2.5 cm、 3.7 cm；南酸枣 Choerospondias axillaris 生长不亚于前两种树 种，但存活率较差；其次为山杜英 Elaeocarpus sylvestris、枫香 Liquidambar formosana、火力楠 Michelia macclurei，第 3 年平均树高超过 2.2 m，平均胸径在 2.3 cm 以上；香樟 Cinnamomum camphora 生长相对 较慢， 3 年生平均树高 1.8 m 左右，平均胸径只有 1.4 cm；银合欢 Leucaena leucocephala 保存率不足 20% 且生长逐年变缓，表明这树种不适宜用于碳汇造林。
关键词:  阔叶树  碳汇造林  早期生长  清新区
DOI：
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基金项目:
Early Growth Performance of 8 Species in Carbon Sequestration in Qinxin District
chenxianxiao1, zhang zhiwei2, chen zhixiong2
1.Guangdong Qingxin White Bay Provincial Nature Reserve Management Office;2.Qingxin District Forestry Bureau of Guangdong Province
Abstract:
The afforestation experiment was carried out by random mass mixing, and the preservation rate, tree height, DBH and crown width were observed by the sample survey method to study the early growth performance of 8 tree species in carbon sequestration afforestation in Qingyuan city, Guangdong province. The results showed that two tree species, including Mytilaria laosensis and Vernicia montana, kept highly survival rate with average value >90% , and displayed fast growth with average height >3.0 m in the third year, and and the average DBH was 2.5 and 3.7 cm. The early growth of Choerospondias axillaris was high , but its survival rate was slow. Elaeocarpus sylvestris， Liquidambar formosana and Michelia macclurei also exhibited vigorous growth with average height >2.2 m in the third year, and the average DBH was more than 2.3 cm. In cotrast, the growth of Cinnamomum camphora was slow with average height ≈ 1.8 m, and average DBH is only 1.4 cm. The Leucaena leucocephala kept the survival rate with average value <20% ,and its growth was slow, suggesting that the two trees were not suitable for carton sequestration in the Qingxin district of Qingyuan city.
Key words:  broad-leaved trees  carton sequestration  early growth  Qingxin district