不同条件下羊栖菜溶解有机碳(DOC)分泌特征  

Research on dissolved organic carbon(DOC)secretion of Sargassum fusiforme under different conditions

作　　者：周庆澔 许曹鲁 权伟 ZHOU Qinghao;XU Caolu;QUAN Wei(Wenzhou Dongtou Agricultural and Rural Bureau,Wenzhou 325700,China;Wenzhou Key Laboratory of Natural Disaster Remote Sensing Monitoring and Early Warning,Zhejiang College of Security Technology,Wenzhou 325016,China;Wenzhou Key Lab of Adding Carbon Sinks and Reducing Carbon Emissions of Agriculture,Forestry and Fishery Ecosystem,Wenzhou Vocational College of Science and Technology,Wenzhou 325006,China)

机构地区：[1]温州市洞头区农业农村局,浙江温州325700 [2]浙江安防职业技术学院,温州市自然灾害遥感监测预警重点实验室,浙江温州325016 [3]温州科技职业学院,温州市农林渔生态系统增汇减排重点实验室,浙江温州325006

出　　处：《渔业研究》2023年第3期271-279,共9页Journal of Fisheries Research

基　　金：2022年度温州市瓯江青年社科学者专项课题(22QN22);温州市科技计划项目(S20160016)。

摘　　要：羊栖菜(Sargassum fusiforme)是一种生长在暖温带至亚热带的褐藻门马尾藻科马尾藻属植物。温州洞头被称作“中国羊栖菜之乡”。为明确羊栖菜在养殖过程中溶解有机碳(DOC)分泌特征,研究设置了盐度、光照强度、pH、水体中总无机氮浓度、水体中总磷酸盐浓度等不同梯度处理,并进行了模拟养殖实验;测定了养殖水体中DOC、溶解无机碳(DIC)浓度,并对其变化速率进行了分析。结果显示:羊栖菜中苗的DOC分泌速率最高;在光照强度2800 lx下,羊栖菜小苗DOC分泌速率和DIC固定速率均最高;在原海水盐度30、pH 8、总无机氮浓度1 mg/L、总磷酸盐浓度0.02 mg/L条件下,羊栖菜小苗DOC分泌速率达到最高;光照强度、盐度、pH、总无机氮浓度、总磷酸盐浓度等环境因素均对羊栖菜DOC的分泌产生影响,不同因素间的影响有一定的差异。Sargassum fusiforme is a kind of Sargassum plant of Sargassaceae of Phaeophyta,which grows in the warm temperate zone to the subtropical zone.Dongtou is called“China s Hometown of Sargassum fusiforme”.In order to clarify the characteristics of dissolved organic carbon(DOC)secretion of S.fusiforme in the process of aquaculture,different gradient treatments such as salinity,light intensity,pH,total inorganic nitrogen concentration in water and total phosphate concentration in water were set up,while simulated aquaculture experiments were carried out.The content of DOC and dissolved inorganic carbon(DIC)in the aquaculture water were measured,and their change rates were analyzed.The results showed that the DOC secretion rate of S.fusiforme medium seedlings was the highest.Under the light intensity of 2800 lx,the DOC secretion rate and the DIC fixation rate of S.fusiforme small seedlings were the highest.Under the conditions of original seawater salinity of 30,pH of 8,total inorganic nitrogen concentration of 1 mg/L,and total phosphate concentration of 0.02 mg/L,S.fusiforme had the highest DOC secretion rate.Light intensity,salinity,pH,total inorganic nitrogen concentration,total phosphate concentration and other environmental factors all affected the DOC secretion of S.fusiforme,and the effects of different factors were certain difference.

关 键 词：羊栖菜 溶解有机碳 溶解无机碳 分泌速率 

分 类 号：S931.1[农业科学—渔业资源]