| CHEN Luzhen,WANG Wenqing,LIN Peng. 2004. Influence of water logging time on the growth of Kandelia candel seedlings. Acta Oceanologica Sinica, (1):149－158 |
| Influence of water logging time on the growth of Kandelia candel seedlings |
| Influence of water logging time on the growth of Kandelia candel seedlings |
| Received:August 09, 2003 Revised:December 28, 2003 |
| DOI： |
| Key words:K. candel growth optimal waterlogging time critical waterlogging time |
| 中文关键词: K. candel growth optimal waterlogging time critical waterlogging time |
| 基金项目: |
| Author Name | Affiliation | E-mail | | CHEN Luzhen | School of Life Science, Xiamen University, Xiamen 361005, China
Research Center for Wetlands and Ecological Engineering, Xiamen University, Xiamen 361005, China | | | WANG Wenqing | School of Life Science, Xiamen University, Xiamen 361005, China
Research Center for Wetlands and Ecological Engineering, Xiamen University, Xiamen 361005, China | luzhenc@263.net | | LIN Peng | School of Life Science, Xiamen University, Xiamen 361005, China
Research Center for Wetlands and Ecological Engineering, Xiamen University, Xiamen 361005, China | |
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| Abstract: |
| Influence of waterlogging time on the growth of Kandelia candel(L.) Druce seedlings grown for 70 d in the artificial-tidal tanks' simulated semidiumal tide under greenhouse is studied. Sand and soil act as the substrate and artificial sea-water with salinity of 15 is used in cultivation. Shorter waterlogging time (inundated for about 2~4 h) promotes thegrowth of K. candel seedlings, while longer time(inundated more than 8 h) or no waterlogging(0 h) inhibits theirgrowth. The number and length of aerating roots increase with the increase ofwaterlogging time. Under existing conditions, the optimal waterlogging time for the growth of K. candel seedlings is about 2~4 h in every tide cycle. Compared with other treatments, the 2 h sanded treatments obtain the highest biomass of seedlings, have the lowest massloss of hypocotyl and broaden the photosynthetic area by increasing the area per leaf after 70-d cultivation. And the soiltreatments have the similar tendeney. However, waterlogging for 8 h in every tide cycle is critieal for normal development of seedlings. K. candel seedlings are highly tolerant to waterlogging and a proper waterlogging is beneficial to thegrowth of K. candel seedlings. |
| 中文摘要: |
| Influence of waterlogging time on the growth of Kandelia candel(L.) Druce seedlings grown for 70 d in the artificial-tidal tanks' simulated semidiumal tide under greenhouse is studied. Sand and soil act as the substrate and artificial sea-water with salinity of 15 is used in cultivation. Shorter waterlogging time (inundated for about 2~4 h) promotes thegrowth of K. candel seedlings, while longer time(inundated more than 8 h) or no waterlogging(0 h) inhibits theirgrowth. The number and length of aerating roots increase with the increase ofwaterlogging time. Under existing conditions, the optimal waterlogging time for the growth of K. candel seedlings is about 2~4 h in every tide cycle. Compared with other treatments, the 2 h sanded treatments obtain the highest biomass of seedlings, have the lowest massloss of hypocotyl and broaden the photosynthetic area by increasing the area per leaf after 70-d cultivation. And the soiltreatments have the similar tendeney. However, waterlogging for 8 h in every tide cycle is critieal for normal development of seedlings. K. candel seedlings are highly tolerant to waterlogging and a proper waterlogging is beneficial to thegrowth of K. candel seedlings. |
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