Natural Regeneration and Dispersal of Eucalyptus leizhou No.1 in Jiangmen Areas,Guangdong
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1.
Research Institute of Forestry,CAF,Beijing 100091,China
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2.
Forest and Horticulture College of He'nan Agriculture University,Zhengzhou 450002,He'nan,China
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3.
Forest and Horticulture College of He'nan Agriculture University,Zhengzhou 450002,He'nan,China
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Received Date:
2006-01-19
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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.
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