摘要
研究了瓦氏马尾藻（Sargassum vachellianum）海区规模化养殖及其对水环境因子的影响。结果表明：瓦氏马尾藻生长适宜水深为1.5～2.5 m,最适水深为2 m;藻体春秋季节生长相对较快,夏季开始衰败,2014年5月养殖和野生藻体均达到最高日特定生长率,分别达6.8%·d-1和5.9%·d-1,且养殖藻体生长及成熟均快于野生藻体;与2013年相比,2014年除1、7号站位外其他站位无机氮（IN）、无机磷（IP）、总氮（TN）、总磷（TP）、化学需氧量（COD）和叶绿素a（Chl-a）质量浓度均显著降低（P〈0.05）,整体呈两侧站位高、中部站位低的趋势;溶解氧（DO）质量浓度和透明度（SD）显著升高（P〈0.05）,其中COD和Chl-a质量浓度分别降低18.75%和43.51%,且后者最高值仅为1.55μg·L-1;DO质量浓度和透明度（SD）分别升高了4.52%和8.09%;瓦氏马尾藻养殖后该海域水质明显改善。该研究结果为瓦氏马尾藻栽培及利用大型海藻进行海洋水质环境修复提供理论依据。
In this paper, large-scale cultivation of Sargassum vachellianum in sea field and its effects on water environmental factors were studied. The results showed that the suitable water depth for S. vachellianum growth was 1.5-2.5 m, and the optimal water depth was 2 m. The fronds of seaweeds grew faster in spring and autumn and declined in summer. In May 2014, the highest specific growth rate of cultivating fronds and wild fronds reached up to 6.8% · d-1 and 5.9% · d-1 , respectively, and cultivating fronds grew faster and matured earlier than wild fronds. In 2014, the IN, IP, TN, TP, COD and Ch-a mass concentrations in all stations except the 1st and 7th stations decreased significantly compared with in 2013 （P〈0.05）. DO mass concentra- tion and SD increased by 4.52% and 8.09% （P〈0.05）, and COD and Chl-a mass concentration decreased by 18.75% and 43.51%, respectively, and the highest mass concentration of Chl-a was about 1.55 ·μg · L-1. The quality of the sea waters was improved significantly after S. vach- ellianum cultivation. This study provided a theoretical basis for cultivation of S. vachellianum and sea water quality environment bioremediation with seaweeds.
出处
《生态学杂志》
CAS
CSCD
北大核心
2015年第11期3214-3220,共7页
Chinese Journal of Ecology
基金
国家科技支撑计划项目(2012BAC07B03)资助
关键词
瓦氏马尾藻
规模化养殖
生长
水环境因子
生态修复
Sargassum vachellianum
large-scale cultivation
growth
water environmentalfactors
bioremediation.
