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| 广东江门地区雷林1号桉的自然更新与扩散 | |
| 引用本文： | 刘宁,郑勇奇,张川红,宗亦臣,茹广欣.广东江门地区雷林1号桉的自然更新与扩散[J].林业科学研究,2006,19(5):616-620. |
| 作者姓名： | 刘宁 郑勇奇 张川红 宗亦臣 茹广欣 |
| 作者单位： | 1. 中国林业科学研究院林业研究所,北京,100091;河南农业大学林学园艺学院,河南,郑州,450002 2. 中国林业科学研究院林业研究所,北京,100091 3. 河南农业大学林学园艺学院,河南,郑州,450002 |
| 基金项目： | 科技部社会公益研究项目 |
| 摘 要： | 调查了雷林1号桉单株的扩散情况及雷林1号桉林缘在广东江门地区主要植被类型(杉木人工林、红花荷人工林和灌木丛)中的扩散情况,采用小样方法调查了雷林1号桉林下乡土乔木树种的自然更新情况.调查发现:15年生雷林1号桉单株在45°扇形样地单向扩散的最大距离为17.82 m,扩散苗最多22株,平均树高4.72 m;雷林1号桉不能扩散进入20年生杉木人工林,可以扩散进入红花荷幼林,但实生苗数量很少,还可以扩散进入地被物较少的灌木丛,且更新苗数量较多.分析表明:雷林1号桉在引种栽培地能自然更新;雷林1号桉种子落地接触土壤、光照充足是其更新的主要条件;有5种乡土树种能在雷林1号桉林下自然更新且正常生长,因此,目前雷林1号桉对乡土树种的自然更新没有影响. |
| 关 键 词： | 雷林1号桉 自然更新 扩散 |
| 文章编号： | 1001-1498（2006）05-0616-05 |
| 收稿时间： | 2006-01-19 |
| 修稿时间： | 2006-01-19 |
Natural Regeneration and Dispersal of Eucalyptus leizhou No.1 in Jiangmen Areas,Guangdong |
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| LIU Ning,ZHENG Yong-qi,ZHANG Chuan-hong,ZONG Yi-chen and RU Guang-xin.Natural Regeneration and Dispersal of Eucalyptus leizhou No.1 in Jiangmen Areas,Guangdong[J].Forest Research,2006,19(5):616-620. | |
| Authors: | LIU Ning ZHENG Yong-qi ZHANG Chuan-hong ZONG Yi-chen and RU Guang-xin |
| Institution: | Research Institute of Forestry,CAF,Beijing 100091,China; Forest and Horticulture College of He'nan Agriculture University,Zhengzhou 450002,He'nan,China;Research Institute of Forestry,CAF,Beijing 100091,China;Research Institute of Forestry,CAF,Beijing 100091,China;Research Institute of Forestry,CAF,Beijing 100091,China;Forest and Horticulture College of He'nan Agriculture University,Zhengzhou 450002,He'nan,China |
| Abstract: | The dispersal of Eucalyptus leizhou No.1 into some vegetation types in Jiangmen and the impact of Eucalyptus leizhou No.1 on natural regeneration of native tree species were studied in order to answer some questions about growing Eucalyptus plantations in China.Investigations on the dispersal of both single trees and stands were carried out by measuring the amount and growth of seedlings and their distance from parent tree or stand edge.Small sample plots were used to investigate the natural regeneration of Eucalyptus leizhou No.1 in the plantations of Rhodoleia championii Hook.F and Cunninghamia lanceolata(Lamb.)Hook.As to Eucalyptus leizhou No.1 aged 15,the longest distance of single-tree dispersal in 45°sector was 17.82 m and the largest amount of natural regenerated trees was 22.The average height of natural regenerated trees is 4.72 m.No invasion of Eucalyptus leizhou No.1 was observed in the tall plantations,such as Cunninghamia lanceolata(Lamb.)Hook .It could spread into the young plantations,such as Rhodoleia championii Hook.F.The light intensity in the plantation significantly impacted the amount of natural regenarated seedlings.The results showed that it could naturally regenerate in China and six native tree species could naturally regenerate under Eucalyptus leizhou No.1 canopy and grew well.Eucalyptus leizhou No.1 was able to disperse into adjacent shrub vegetation. |
| Keywords: | Eucalyptus leizhou No 1 natural regeneration dispersal |
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