深水裸滩红树植物与落羽杉生长适应性研究

对深水裸滩几种红树植物及沼生植物落羽杉的生长适应性研究结果表明：(1)红树植物无瓣海桑与落羽杉的成活率和生长速度较接近,远超过桐花树、秋茄和木榄,证明无瓣海桑和落羽杉对于深水裸滩的生长适应能力较强,具有速生特性;(2)随滩面高度的降低,海水淹浸时间的增加,红树植物和落羽杉的成活率及生长速度有下降的趋势。在滩面高度低于-0．9m时,落羽杉成活和生长极差,各种红树植物则无法成活和生长。落羽杉的耐淹浸能力最强,其次为无瓣海桑,桐花树较差,秋茄和木榄最差;(3)在同一生长地红树植物与落羽杉的生长指标间存在一定的相关性。无瓣海桑与落羽杉之间的生长相关性最为明显,各生长指标间基本上都表现出极显著的相关性,而桐花树、秋茄、木榄与落羽杉的毕长相关性较差。

Adaptability of Several Mangrove Species and Taxodium distichum on Deep-water Mudflat

Research on the adaptabilities of sereral mangrove species and Taxodium distichum on deep-water mudflat showed that (1) the growing speed and survival rate of mangrove species Sonneratia apetala were close to that of Taxodium distichum, greatly higher than that of Aegiceras corniculatum, Kandelia candel and Bruguiera gymnorhiza, proving that Sonneratia apetala and Taxodium distichum had a strong growth adaptability on deep-water mudflat and fast-growing characteristics; (2) with the decrease of the mudflat height, the survival rate and growing speed of mangrove species and Taxodium distichum decreased accordingly. Taxodium distichum grew poorly and few surived under mudflat height of -0.9 m,and all the mangrove secies could not even survive.The ability of Taxodium distichum to endure sea water inundation was the greatest,next was Sonneratia apetala,Aegiceras corniculatum was poor,and Kandelia candel and Bruguiera gynnorhiza were the poorest;(3) there existed certain correlations between growth indexes of mangrove species and Taxodium distichum at the same place. The correlations between Sonneratia apetala and Taxodium distichum were most remarkable, almost every growth index of Sonneratia apetala had especially notable correlation with that of Taxodium distichum. Aegiceras corniculatum,Kandelia candel and Bruguiera gymnorhiza had relatively poor growth correlations with Taxodium distichum.