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| 伞房属4个树种/亚种在广东乐昌的早期生长表现 |
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孔凡启,祝文娟,刘天颐,黄少伟,邓智曦
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广东省林木种苗管理总站 广州,广东省森林植物种质创新与利用重点实验室,广东省森林植物种质创新与利用重点实验室,广东省森林植物种质创新与利用重点实验室,广东省乐昌市龙山林场
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| 摘要: |
| 分析引自澳大利亚东部的桃金娘科（Myrtaceae）伞房属(Corymbia) 4个树种/亚种在广东省乐昌试验点的早期生长表现，结果表明：10 a生时，4个树种/亚种生长量最大的是大叶斑皮桉（Corymbia henryi），其次是斑皮柠檬桉（Corymbia citriodora ssp. variegata）、柠檬桉（Corymbia citriodora ssp. citriodora）和斑皮桉（Corymbia maculata），平均单株材积分别为0067 4、0059 0、0054 1和0034 1 m3；与8 a生时比较，4个树种/亚种在10 a生时仍保持较快的增长速度，材积增长均在67%以上，其中斑皮桉的材积增长率高达1450%。方差分析结果表明：在试验组Ⅰ，柠檬桉和大叶斑皮桉3个生长性状在家系间差异极显著（P＜001），种源间胸径差异达极显著水平（P＜001），树高差异达显著水平（P＜005），单株材积差异不显著；在试验组Ⅱ，斑皮柠檬桉和斑皮桉3个生长性状在种源、家系间差异极显著（P＜001）。以单株材积高于对照为选择目标，选出大叶斑皮桉2个种源2个家系，斑皮柠檬桉5个种源11个家系，共计7个种源13个家系，分别占参试种源和家系总数的389%和140%。
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| 关键词: 伞房属 种源 家系 生长表现 |
| DOI： |
| 分类号:s791.246 |
| 基金项目:华南农业大学“211”工程建设项目“林木花卉种质创新与利用” |
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| Early Growth Performance of Four Species and Subspecies in the Genus Corymbia in Lechang City |
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Kong Fanqi,Zhu Wenjuan,Liu Tianyi,Huang Shaowei and Deng Zhixi
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Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm,Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm,Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm,Lechang Forest Farm
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| Abstract: |
| Early growth performance of four species and subspecies in genus Corymbia from eastern Australia was studied. The average increments at the age of eight and ten years in Lechang, Guangdong province were analyzed, and provenance and family selection was proceeded based on growth traits at the age of ten years. The best species was C. henryi, followed by C. citriodora ssp. variegata, C. citriodora ssp. citriodora and C. maculata. The average single-tree volumes of four species were 0067 4, 0059 0, 0054 1 and 0034 1 m3, respectively. The four species and subspecies had been keeping a fast growth rate after 10 years old, and the volume increasing rate was above 67%. Analysis of variance for growth traits showed that the height, diameter at breast height (DBH) and single-tree volume of C. citriodora ssp. citriodora and C. henryi in group Ⅰhad extremely significant differences among families, the diameter at breast height (DBH) had extremely significant differences among provenances, the height had significant differences among provenances, and the single-tree volume had no significant differences among provenances. The height, DBH and single-tree volume in groupⅡ of C. citriodora ssp. variegata, and C. maculata had significant differences across provenances and families. Seven provenances and thirteen families were selected as the single-tree volume which were higher than the CK in total, accounting for 389% of all provenances and 140% of all families, respectively. |
| Key words: Corymbia,provenance,family,growth performance |
