摘要
于1995年3、5月在九龙江口进行两个航次的现场调查，研究不同形态磷的河口行为，并估算生物可利用磷的入海通量。结果表明，在S＜20区域内，溶解活性磷（DRP）的行为受控于“缓冲机制”，其含量在8～10μg／dm3水平上下波动。颗粒磷中MgCl2。可提取磷（MgCl2-P）含量随盐度增大而增大，并与叶绿素a以及悬浮物中Fe、Mn、Al含量呈正相关关系。NaOH／NaCl可提取磷（NaOH／NaCl－P）随盐度增大按指数关系下降，其含量与悬浮物中Fe、Mn、Al含量呈正相关关系。HCl可提取磷（HCl－P）在河口区的行为表现为保守混合。九龙江口生物可利用磷入海通量约517t／a，其中潜在生物可利用磷（PBAP）的贡献为溶解活性磷（DRP）的3倍。
The surface seawater samples of the Jiulongjiang Estuary were collected in March andMay, 1995,and the behaviours of different forms of phosphorus and BAP flux in the estuaryhave been estimated. The results show that the distribution of DRP is controlled by 'buffermechanism'at low salinity (S<20). The content of MgCl2-extractable phosphorus (MgCl2~P)in particulate phosphorus increases with the increase of salinity,and there are some positivecorrelation between MgCl2-P and Chlorophyll,and the contents of particulate Fe,Mn,Al re-spectively. NaOH/NaCl extractable Phosphorus (NaOH/NaCl-P)decreases exponently withthe increase of salinity. The behaviour of HCl-extractable phosphorus (HCl-P) is conserva-tive. The flux of BAP from the Jiulongjiang Estuary is estimated to be 517 t/a,and the raticof PBAP/DRP about 2. 98.
出处
《台湾海峡》
CAS
CSCD
1998年第3期269-274,共6页
Journal of Oceanography In Taiwan Strait
基金
国家自然科学基金!49176270
关键词
磷
生物可利用磷
入海通量
九龙江口
Phosphorus, bioavailable phosphorus, flux, Jiulongjiang Estuary
