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粤西黑木相思人工林生长评价
陈水莲1, 谭瑞坤1, 赵苗菲1, 陆冰浪1, 曾炳山2, 韩东苗1, 胡炜1
1.肇庆市林业科学研究所;2.中国林业科学研究院热带林业研究所
摘要:
为筛选出适合粤西地区推广种植的优良黑木相思 Acacia melanoxylon 无性系, 选取 SR3、 R14、 SR17、 SR20、 SR21、 SR25、 SR53、 SF1 共 8 个黑木相思无性系组培苗, 测定造林 2 年后的树高、 胸径和保存率。 结果表明: 不同无性系间树高、 胸径、 保存率均存在显著差异 (P<0. 05)。 其中, SR17 的树高、 胸径、 保存率均为最大, 分别为 6. 49 m、 7. 08 cm, 97%; SF1 的树高、 胸径、 保存率均为最低, 分别为 4. 7 m、 5. 3 cm, 93%。 对不同无性系生长性状进行评价, 苗木生长指标的综合得分排序依次为: SR17>SR14>SR21>SR25>SR20>SR53>SR3>SF1。 综合早期生长表现, SR17、 SR14 生长速度快、 保存率高、 适应性强, 适合在粤西地区推广种植; SF1 生长速度慢、 保存率低, 不宜于在粤西地区大面积推广种植。
关键词:  黑木相思  无性系  生长评价
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基金项目:广东省林业科技创新项目（2020KJCX014），中央财政林业科技推广示范项目（[2020]GDTK-12）
Growth Evaluation of Acacia melanoxylon Plantation in Western Guangdong
Chen Shui-Lian1, tan ruikun1, zhao miaofei1, lu binglang1, zeng bingshan2, han dongmiao1, hu wei1
1.Forest Research Institution of Zhaoqing;2.Research Institute of Tropical Forestry，Chinese Academy of Forestry
Abstract:
To screen out the excellent Acacia melanoxylon clones suitable for planting in western Guangong, eight tissue culture seedlingsof A. melanoxylon, including SR3, SR14, SR17, SR20, SR21, SR25, SR53, and SF1, were selected to cultivate seedlings, and the growth indexes such as tree height, DBH, and preservation rate were measured after two years of afforestation. The results showed that there were significant differences in tree height, DBH, and preservation rate among different clones ( P < 0. 05) . Among them, SR17 had the highest tree height, DBH, and preservation rate, which were 6. 49 m, 7. 08 cm, and 97%, respectively. SF1 had the lowest tree height, DBH, and preservation rate, which were 4. 7 m, 5. 3 cm, and 93%, respectively. Thegrowth traits of different cloneswere evaluated, andthe comprehensive scores of seedling growth indexes were ranked asfollows: SR17>SR14>SR21>SR25>SR20>SR53>SR3>SF1. Based on the early growth performance, SR17 and SR14 havefastgrowth rates, high preservation rates, and strong adaptability, which are suitable for planting in western Guangdong. SF1 hasa slow growth rate and low preservation rate, soit is not suitable for large-scale planting in western Guangdong.
Key words:  Acacia melanoxylon  cloned line  early evaluation