西沪港海带中的碳氮磷生态化学计量特征及其环境影响因素  

Carbon,nitrogen and phosphorus stoichiometry in Saccharina japonica in Xihu harbor and its impact factors

作　　者：杨路 李训猛 王凯 章守宇[1,2] 崔潇 吴松[1,2] YANG Lu;LI Xunmeng;WANG Kai;ZHANG Shouyu;CUI Xiao;WU Song(College of Marine Ecology and Environment,Shanghai Ocean University,Shanghai 201306,China;Engineering Technology Research Center of Marine Ranching,Shanghai Ocean University,Shanghai 201306,China)

机构地区：[1]上海海洋大学海洋生态与环境学院,上海201306 [2]上海海洋大学海洋牧场工程技术研究中心,上海201306

出　　处：《海洋湖沼通报(中英文)》2025年第1期96-104,共9页Transactions of Oceanology and Limnology

基　　金：国家现代农业产业技术体系专项资金(CARS-50)。

摘　　要：探究不同生长阶段海带(Saccharina japonica)碳(C)、氮(N)和磷(P)含量和生态化学计量特征对揭示海带有机体内物质循环及能量流动具有重要生态意义。本文采用现场调查和室内分析相结合的方法,测定了西沪港养殖海带不同生长时期的C、N、P含量及养殖水体环境特征。结果表明:在不同生长阶段,海带C含量变化不大,其变化范围为37.62%~38.62%,平均含量为37.98±0.38%;随着海带的生长,N、P含量逐渐降低,其中N含量的变化范围为2.33%~4.25%,平均含量为3.33±0.75%,P的含量变化范围为0.15%~0.30%,平均含量为0.20±0.06%;海带N/P总体保持稳定,变化范围为12.21~15.25,平均值为14.54±1.31;海带C/N、C/P在生长期内随着海带的生长逐渐增加,海带C/N变化范围为9.10~16.43,平均值为12.10±3.00,海带C/P变化范围为126.50~248.53,平均值为175.10±51.51。海带氮、磷含量对环境因子和生长特征的响应较为明显,主要影响环境因子为盐度、pH和海水养分。海带C/N、C/P的变化反映出藻体对N和P养分利用效率随海带的快速生长而提高。The contents of carbon,nitrogen and phosphorus of Saccharina japonica at different growth stages are of great ecological significance to reveal the material circulation and energy flow.Through field investigation and indoor analysis,we measured the contents of C,N,P and the environmental characteristics of aquaculture waters at different growth stages of cultured S.japonica in Xihu harbor.at different growth stages,the content of C in S.japonica ranged from 37.62%to 38.62%,with an average of 37.98±0.38%.With the growth of seaweed,the contents of N and P decreased gradually.N content ranged from 2.33%to 4.25%with an average of 3.33±0.75%.P content varied between 0.15%and 0.30%with an average of 0.20±0.06%.The N/P of seaweed remained stable,with an average of 14.54±1.31.C/N and C/P increased gradually with the growth of S.japonica.The C/N ranged from 9.10 to 16.43 with an average of 12.10±3.00,and C/P ranged from 126.50 to 248.53 with an average of 175.10±51.51.The contents of nitrogen and phosphorus in S.japonica respond significantly to environmental factors and growth characteristics.The main factors are salinity,pH and nutrients.The changes of C/N and C/P reflect that the nutrient utilization efficiency to N and P increases with the rapid growth of S.japonica.

关 键 词：海带 碳 氮 磷 生态 

分 类 号：S917.3[农业科学—水产科学]