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Propagating Native Tree Seedlings for Forest Rehabilitation in Hong Kong, China

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Description:This dissertation, "Propagating Native Tree Seedlings for Forest Rehabilitation in Hong Kong, China" by Wai-ting, Wong, 黃煒婷, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled PROPAGATING NATIVE TREE SEEDLINGS FOR FOREST REHABILITATION IN HONG KONG, CHINA Submitted by Wong Wai Ting for the degree of Master of Philosophy at The University of Hong Kong in October 2006 Planting nursery-grown native tree seedlings has become a popular reforestation method for biodiversity conservation during the last decade. Propagating high quality seedlings has become an important task. However, there is a general lack of knowledge of how to propagate native seedlings in the tropics, including Hong Kong. Because of the high diversity of tropical native tree species, local studies cannot be avoided. The aim of this study was to investigate the growth responses of seedlings to different growth container types, shading intensities, irrigation and fertilizer application frequencies in the nursery. The ultimate aim was to identify cost-effective nursery treatments for the production of high quality native tree seedlings for Hong Kong and South China. The growth responses of 6 native tree seedling species grown in root trainers and traditional polystyrene bags for 9 months were compared. Only Litsea glutinosa and Schefflera heptaphylla showed significantly less root coiling in root trainers than in polystyrene bags. Root trainers are thus recommended for the propagation of these two species only. Given that seedlings for hillside reforestation are normally raised for 18 months in the nursery, the duration of the current study may not be sufficient to assess the other four species tested. Four different fertilization frequencies were compared for 5 of the 6 species in the previous experiment. The results show that Lithocarpus hancei and S. heptaphylla would only need to be fertilized every 9 weeks. Applying fertilizer every 6 weeks seemed to be more suitable for L. glutinosa and Zanthoxylum avicennae. Less frequent fertilization was recommended for Gordonia axillaris. For shading requirements, Lithocarpus hancei, Litsea glutinosa and S. heptaphylla grew equally well under full sunlight and shade. G. axillaris and Z. avicennae tended to grow better under full sunlight. Finally, the results of the irrigation experiment show that G. axillaris and Z. avicennae did not require daily irrigation but Lithocarpus hancei, Litsea glutinosa and S. heptaphylla would grow better when frequent irrigation was provided. The results seem to fit in with the natural growing habit of these tested species. G. axillaris and Z. avicennae are both very common in shrublands and young forests in Hong Kong which are mostly very exposed and dry. S. heptaphylla, Z. avicennae and G. axillaris have been identified in previous studies in Hong Kong as potential framework species for reforestation. They would thus need to be required for larger scale propagation in Hong Kong. The results of the current study can be used to optimize the nursery requirements of these species and also show that the growth responses to the different treatments were species specific. Any attempt to make generalizations may be risky. This reinforces the belief that species specific evaluations are needed for large scale propagation of any species. DOI: 10.5353/th_b3767057 Subjects: Trees - China - Hong Kong - Seedlings, ContainerForest regeneration - China - Hong KongWe have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Propagating Native Tree Seedlings for Forest Rehabilitation in Hong Kong, China. To get started finding Propagating Native Tree Seedlings for Forest Rehabilitation in Hong Kong, China, you are right to find our website which has a comprehensive collection of manuals listed.
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Description: This dissertation, "Propagating Native Tree Seedlings for Forest Rehabilitation in Hong Kong, China" by Wai-ting, Wong, 黃煒婷, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled PROPAGATING NATIVE TREE SEEDLINGS FOR FOREST REHABILITATION IN HONG KONG, CHINA Submitted by Wong Wai Ting for the degree of Master of Philosophy at The University of Hong Kong in October 2006 Planting nursery-grown native tree seedlings has become a popular reforestation method for biodiversity conservation during the last decade. Propagating high quality seedlings has become an important task. However, there is a general lack of knowledge of how to propagate native seedlings in the tropics, including Hong Kong. Because of the high diversity of tropical native tree species, local studies cannot be avoided. The aim of this study was to investigate the growth responses of seedlings to different growth container types, shading intensities, irrigation and fertilizer application frequencies in the nursery. The ultimate aim was to identify cost-effective nursery treatments for the production of high quality native tree seedlings for Hong Kong and South China. The growth responses of 6 native tree seedling species grown in root trainers and traditional polystyrene bags for 9 months were compared. Only Litsea glutinosa and Schefflera heptaphylla showed significantly less root coiling in root trainers than in polystyrene bags. Root trainers are thus recommended for the propagation of these two species only. Given that seedlings for hillside reforestation are normally raised for 18 months in the nursery, the duration of the current study may not be sufficient to assess the other four species tested. Four different fertilization frequencies were compared for 5 of the 6 species in the previous experiment. The results show that Lithocarpus hancei and S. heptaphylla would only need to be fertilized every 9 weeks. Applying fertilizer every 6 weeks seemed to be more suitable for L. glutinosa and Zanthoxylum avicennae. Less frequent fertilization was recommended for Gordonia axillaris. For shading requirements, Lithocarpus hancei, Litsea glutinosa and S. heptaphylla grew equally well under full sunlight and shade. G. axillaris and Z. avicennae tended to grow better under full sunlight. Finally, the results of the irrigation experiment show that G. axillaris and Z. avicennae did not require daily irrigation but Lithocarpus hancei, Litsea glutinosa and S. heptaphylla would grow better when frequent irrigation was provided. The results seem to fit in with the natural growing habit of these tested species. G. axillaris and Z. avicennae are both very common in shrublands and young forests in Hong Kong which are mostly very exposed and dry. S. heptaphylla, Z. avicennae and G. axillaris have been identified in previous studies in Hong Kong as potential framework species for reforestation. They would thus need to be required for larger scale propagation in Hong Kong. The results of the current study can be used to optimize the nursery requirements of these species and also show that the growth responses to the different treatments were species specific. Any attempt to make generalizations may be risky. This reinforces the belief that species specific evaluations are needed for large scale propagation of any species. DOI: 10.5353/th_b3767057 Subjects: Trees - China - Hong Kong - Seedlings, ContainerForest regeneration - China - Hong KongWe have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Propagating Native Tree Seedlings for Forest Rehabilitation in Hong Kong, China. To get started finding Propagating Native Tree Seedlings for Forest Rehabilitation in Hong Kong, China, you are right to find our website which has a comprehensive collection of manuals listed.
Our library is the biggest of these that have literally hundreds of thousands of different products represented.

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Propagating Native Tree Seedlings for Forest Rehabilitation in Hong Kong, China

Propagating Native Tree Seedlings for Forest Rehabilitation in Hong Kong, China

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