北黄海与渤海沉积物中磷形态的分布特征

对1998年9月和1999年5月渤海航次和1999年8月北黄海航次所采集的柱状沉积物和表层沉积物样品进行了P形态的六步连续提取分析，分析了各种形态P在表层及垂直方向上的分布特征。并通过对沉积物充空气和N2条件下培养前后各步形态P的测定，认识各步形态P培养前后的变化以及不同的氧化还原环境对各步形态P的影响。结果表明：从渤海到并黄海总P的含量逐步降低。碎屑磷灰石的含量在六步中含量最高，约占50%左右，其次是非活性有机磷，约占20%，其他几步含量较小；充N2培养沉积物样品中碎屑磷灰石的含量要比充空气的低，其他形态的P较充空气培养的略高或相关不大。

Phosphorus speciation in the sediments of the Bohai Sea and North Yellow Sea

Surface and core sediment samples were collected in September 1998 and May 1999 in the Bohai Sea, August 1999 in the North Yellow Sea. A six steps sequential extraction technique was used for the sediment samples. The contents of total phosphorus decreased gradually from the Bohai Sea to the Yellow Sea. The contents of edtrital apatite were the highest in the six phosphorus forms accounting for ca. 50%, followed by refractory organic phosphorus accounting for ca. 20%, then authigenic apatite, CaCO 3 bound inorganic phosphorus and leachable organic phosphorus, adsorbed inorganic phosphorus, iron bound inorganic phosphorus, CaCO 3 adsorbde inorganic phosphorus, loosely adsorbed inorganic phosphorus. In the incubated core sediment samples bubbled with air or nitrogen, the contents of phosphorus fractions in sediment incubated with nitrogen were higher than or similar to that with air except detrital apatite.