摘要
本文介绍用氧电极法测定海南岛潮下带产的凤尾菜Gracilaria eucheumoides等6种热带红藻和无肋马尾藻Sargassum enerve等3种热带褐藻的光合活性和光量子通量密度的关系。研究结果表明:1.红藻和褐藻的补偿点差别不大,9种热带海藻的光合作用补偿点都在24—28μE/(m^2·s)之间,而光合作用饱和点上的净光合作用速率为0.18—0.66mgO_2/(g鲜重·h),一般而言,红藻的较低,褐藻的较高;2.各种热带海藻的光合作用饱和点的差异,其规律也符合一般海藻的垂直分布规律;3.对人工栽培的凤尾菜、琼枝Eucheuma gelatinae卡帕藻Kappaphycus alvarezii等,可以扩大生长水层,在更深一些的水层中栽培,这对发展生产是非常有利的。
In this paper, the relationship between light aquatum intensity and photosynthetic activity of 6 species of tropical Rhodophyceae and 3 species of tropical Phaeophyceae, namely, Gracilaria eucheumoides, Sargassum enerve etc. which grow in Hainan Province, has been examined by continuous recording the oxygen electrode system. The results are as follows.The photosynthetic compensation points of 9 species of tropical algae are in a range of 24-28μE/(m2·s) and the compensation point of red algae is close to that of brown algae. However, light saturation point of red algae is below that of brown algae, within a variation range of 70 to 330μE/(m2·s). At the saturation point, net photosynthetic rate of these seaweeds is in a scope from 0.18 to 0.66 mgO2/(g Fresh wt·hr), generally net photosynthetic rate of brown algae is higher than that of the red ones.The results of the above study presents that these artificial cultured species, namely Gracilaria eucheumoides, Eucheuma gelatinae and Kappaphycus alvarezii etc., can grow in a deeper layer of sea water. For this reason, we can expand the sea water layer for seaweed culture, which can promote development in the production of these seaweeds.
出处
《热带海洋》
CSCD
1992年第2期83-88,共6页
关键词
热带
海藻
光合作用
光量子通量
tropical seeweeds, photosynthesis, light aquatum intensity
