深圳福田几种红树植物繁殖体与不同发育阶段叶片热值研究

对深圳福田红树林区的秋茄 (Kandelia candel)、木榄 (Bruguiera gymnorrhiza)、桐花树 (Aegiceras corniculatum)、无瓣海桑 (Sonneratia apetala)、海漆 (Excoecaria agallocha)、银叶树 (Heritiera littoralis)不同发育阶段叶片以及秋茄、木榄、桐花树、无瓣海桑、海漆繁殖体的灰分含量和热值进行研究.结果表明( 1)不同发育阶段叶片的灰分含量变化趋势没有一定的规律性, 6种红树植物中老叶灰分含量均不是最低;植物繁殖体的灰分含量低于成熟叶;( 2)秋茄、无瓣海桑、木榄、桐花树繁殖体的干质量热值和去灰分热值基本上低于不同发育阶段叶片,而海漆繁殖体的干质量热值和去灰分热值高于不同发育阶段叶片;( 3) 6种红树植物不同发育阶段叶片的干质量热值与灰分含量具有极显著的线性负相关( P<0.01),不同发育阶段叶片和繁殖体的干质量热值与灰分含量具有显著线性负相关( P<0.05).

Caloric values of propagules and leaves at the different development stages of mangrove species at Futian,Shenzhen

This paper discusses the caloric value and ash content found in the leaves of the mangrove species (Kandelia candel, Bruguiera gymnorrhiza, Aegiceras corniculatum, Sonneratia apetala, Excoecaria agallocha, Heritiera littoralis) and the propagules of Kandelia candel during different development stages. The results showed:(1) During different development stages no general trends were found in ash content. Ash content in mature leaves was not the lowest and the content of ash in the propagules were lower than in the mature leaves.(2) The propagules of Kandelia candel, Sonneratia apetala, Bruguiera gymnorrhiza and Aegiceras corniculatum had the lowest grass caloric and ash free caloric values than those of any other development stage. This was not the case with Exoecaria agallocha which showed the opposite trend.(3) Gross caloric values were correlated remarkably with ash contents (P<0.01) in the leaves during different development stages also, correlated remarkably with ash contents (P<0.05) for propagules and the leaves during the different development stages.