CAJ | 학술논문

采用沉积物无机磷分级方法结合上覆水初级生产力测定研究了海州湾海洋牧场海域表层沉积物磷的赋存形态及其生物有效性.结果表明：夏季总磷的含量高于春、秋两季,赋存形态以无机磷为主,平均占总磷的45.50%,各无机磷赋存形态的含量大小依次为：残渣态磷>钙结合态磷>铁铝结合态磷>可交换态磷.其中可交换态磷、铁铝结合态磷以及钙结合态磷与有机碳含量成显著正相关(P<0.01,R>0.8).平面分布整体上呈现由近岸向远岸减小的趋势,这主要与陆源物质排放及沉积物自身质地有关.沉积物中的生物有效磷含量占总磷的36.95%,所占比例较大.
채용침적물무궤린분급방법결합상복수초급생산력측정연구료해주만해양목장해역표층침적물린적부존형태급기생물유효성.결과표명：하계총린적함량고우춘、추량계,부존형태이무궤린위주,평균점총린적45.50%,각무궤린부존형태적함량대소의차위：잔사태린>개결합태린>철려결합태린>가교환태린.기중가교환태린、철려결합태린이급개결합태린여유궤탄함량성현저정상관(P<0.01,R>0.8).평면분포정체상정현유근안향원안감소적추세,저주요여륙원물질배방급침적물자신질지유관.침적물중적생물유효린함량점총린적36.95%,소점비례교대.
The chemical speciation of phosphorus as well as its bioavailability of the marine ranching demonstration area of Haizhou Bay sediment was investigated by the grading methods for inorganic phosphorus in combination with the determination of the overlying water primary productivity. The results showed that the content of TP in summer was significantly higher than the spring and autumn, Inorganic phosphorus (IP) was the most abundant form, which accounted for 45.50% of TP. Content of inorganic phosphorus fractions in the surface sediment followed the order: residual inorganic phosphorus (Re-P)>calcium bound phosphorus (Ca-P)>Fe and Al-bound phosphorus ((Fe+Al)-P)>exchangeable phosphorus (Ex-P). Ex-P, (Fe+Al)-P and Ca-P had positive correlation with organic carbon content (P<0.01,R>0.8). Phosphorus content in surface sediments decreased from inshore to open sea of Haizhou Bay. This trend can be mainly attributed to the effects of terrigenous input and the sediment texture. The potentially biological available phosphorus (BAP) accounted for a large proportion (36.95%) of TP.