Hostname: page-component-848d4c4894-xfwgj Total loading time: 0 Render date: 2024-06-22T14:34:59.793Z Has data issue: false hasContentIssue false
  • English
  • Français

Distribution, Growth, and Seed Germination Ability of Lead Tree (Leucaena leucocephala) Plants in Penghu Islands, Taiwan

Published online by Cambridge University Press:  20 January 2017

Chen-Yu Hwang ,
Ling-Ming Hsu ,
Yow-Jang Liou  and
Ching-Yuh Wang
Chen-Yu Hwang
Affiliation:
Department of Agronomy, National Chung-Hsing University, 250 Kuokuang Road, Taichung, Taiwan
Ling-Ming Hsu
Affiliation:
Department of Agronomy, National Chung-Hsing University, 250 Kuokuang Road, Taichung, Taiwan
Yow-Jang Liou
Affiliation:
Department of Agronomy, National Chung-Hsing University, 250 Kuokuang Road, Taichung, Taiwan
Ching-Yuh Wang*
Affiliation:
Department of Agronomy, National Chung-Hsing University, 250 Kuokuang Road, Taichung, Taiwan
*
Corresponding author's E-mail: cywang@nchu.edu.tw.
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The distribution, growth, and seed germination ability of the exotic lead tree in Penghu Islands, Taiwan, were studied. Survey results have shown that all lead tree plants existing throughout these islands belonged to the Hawaii type. Subsequently a comparison of germination requirements between this and the rare Salvador type, which distributes only in the island of Taiwan, was carried out. The objective of this research was to compare the germination requirements of the Salvador- and Hawaii-type lead tree plants. Lead trees in Penghu Islands have formed a pure forest with a height ranging from 2 to 4 m. All growth stages of the lead tree, i.e., vegetative, flowering, podding, and depodding stages, were found simultaneously in fall, but only vegetative and podding stages were observed in summer. Germination of both the Hawaii- and Salvador-type lead tree was evaluated under different environmental conditions, including temperature, pH, osmotic potential, burial depth, and lighting condition. The Salvador-type exhibited more than 60% seed germination after 14 d at temperatures between 20 and 35 C, whereas the seed germination of the Hawaii type increased from 20 to 60% with temperature increases from 20 to 35 C. The optimal temperature for seed germination of these two types of lead tree was 35 C. Increasing burial depth beneath the soil surface and darkness, as well as an osmotic potential below −0.4 MPa, also reduced seed germination. However, the germination of both types was not affected by pH ranging from 4.0 to 9.0. On the basis of the climatic and soil environment conditions in Penghu Islands, it is reasonable to predict that the summer season, in which lead tree seeds readily germinate on the ground or in shallow soils, is the optimal time for controlling this plant.

La distribución, el crecimiento y la habilidad de germinación de la Leucaena leucocephala (Lam.) de. Wit., se estudiaron en las Islas Penghu, Taiwán. Los resultados de la muestra revelaron que todas las plantas de Leucaena leucocephala (Lam.) existentes en estas islas pertenecen al tipo Hawaii. Subsecuentemente se realizó una comparación de los requisitos de germinación entre este árbol y el de la tipo denominado Salvador, especie rara que se encuentra solamente en la Isla de Taiwán. El objetivo de esta investigación fue comparar los requisitos de germinación de las plantas Leucaena leucocephala (Lam.) de los tipos Salvador y Hawaii. Las plantas de esta especie en las Islas Penghu han formado un bosque uniforme con una altura que varía de 2 a 4 m. Todas las etapas de crecimiento de la Leucaena, ejemplos: vegetativa, florecimiento, formación y apertura de las vainas, se observaron simultáneamente en el otoño, pero sólo el estado vegetativo y el de formación de la vaina se observaron en el verano. La germinación de ambos tipos de plantas, se evaluó bajo diferentes condiciones ambientales, incluyendo temperatura, pH, potencial osmótico, profundidad de siembra y condiciones de luz. El tipo Salvador mostró más del 60% de germinación de semillas después de 14 días, a cualquier temperatura entre 20 y 35 C, mientras que la del tipo Hawaii se incrementó de un 20 a un 60% en respuesta los aumentos en la temperatura a partir de los 20 hasta los 35 C. La temperatura óptima para la germinación de las semillas de estos dos tipos de Leucaena leucocephala (Lam.) fue de 35 C. También se observó una disminución en la germinación al incrementar la profundidad de siembra y la oscuridad así como mantener el potencial osmótico por debajo de −0.4 MPa Sin embargo, la germinación en ambos tipos no fue afectada por la variación del pH de 4.0 a 9.0. Basado en las condiciones climáticas y de suelo en las Islas Penghu, es razonable predecir que la estación de verano en la cual las semillas de Leucaena leucocephala (Lam.) germinan fácilmente sobre la tierra o en suelos poco profundos, es la temporada óptima para controlar esta planta.

Keywords

Lead treeLeucaena leucocephala (Lam.) de. WitGeographicclimaticenvironmentinvasive weednative speciestime to control
Type
Weed Biology and Competition
Information
Weed Technology , Volume 24 , Issue 4 , December 2010 , pp. 574 - 582
Copyright
Copyright © Weed Science Society of America 

References

Literature Cited

Akinola, J. O., Iji, P. A., Bonidefaiye, S. O., and Oloruniu, S. A. S. 1999. Studies on seed germination and seedling emergence in Leucaena leucocephala (Lam.) de Wit cv. Peru. Seed Sci. Technol. 27:123–129.Google Scholar
Brewbaker, J. L., Hegde, N., Hutton, E. M., Jones, R. J., Lowry, J. B., Moog, F., and van den Beldt, R. 1985. Leucaena—Forage Production and Use. Nitrogen: Fixing Tree Association, Hawaii. 39 p.Google Scholar
Central Weather Bureau 2010. Daily precipitation. Ministry of Communication, Executive Yuan, Taiwan. http://www.cwb.gov.tw/V6/statistics/dailyPrecipitation/dP.php. Accessed: May 17, 2010. [In Chinese].Google Scholar
Chachalis, D. and Reddy, K. N. 2000. Factors affecting Campsis radicans seed germination and seedling emergence. Weed Sci. 48:212–216.Google Scholar
Chen, K. L. 2003. Promotion of Forestry Establishment on Farm Land Utilization Fundamental Way to Control Lead Tree. Penghu, Taiwan: Agriculture and Fisheries Bureau, Penghu County Government, Taiwan.Google Scholar
Chen, R. F., Wang, H. H., and Wang, C. Y. 2008. Dissipation of glyphosate injected into the lead tree (Leucaena leucocephala L.) in different seasons in Taiwan. Taiwan J. For. Sci. 23:375–387.Google Scholar
Chen, Z. H. and Lee, Z. M. 2005. Using GIS to analyze characters of plant vegetation distribution in Penghu area. The Third Symposium of Land Research—Territory Plan and Sustainable Management. Feng-Chai University, Taichung, Taiwan. [in Chinese].Google Scholar
Cooksley, D. G., Prinsen, J. H., and Paton, C. J. 1988. Leucaena leucocephala production in subcoastal south-east Queensland. Trop. Grass. 22:21–26.Google Scholar
Lee, P. F. 2005. Exotic plants. Pages 152–159. In Lee, P. F. ed. Green Land—Natural Resources and Ecology GIS Database in Taiwan. Taipei, Taiwan: Forestry Bureau, Council of Agriculture, Executive Yuan. [Official publication in Chinese].Google Scholar
Shaukat, S. S. and Shafiq, N. 1998. Effects of simulated acid rain on germination and seedling growth of some wild and cultivated species. Rak. J. Biol. Sci. 1:219–222.Google Scholar
Shelton, H. M. and Brewbaker, J. L. 1994. Leucaena leucocephala—the most widely used forage tree legume. Pages 15–29. In Gutteridge, R. C. and Shelton, H. M. eds. Forage Trees as Legumes in Tropical Agriculture. Wallingford, CT: CAB International.Google Scholar
Smith, C. A., Shaw, D. R., and Newsom, L. J. 1992. Arrowleaf sida (Sida rhombifolia) and prickly sida (Sida spinosa): germination and emergence. Weed Res. 32:103–109.CrossRefGoogle Scholar