【摘要】 <正>海洋沉积物中的有机质和氮化合物都是生物的营养物。但是,如果沉积物中有机质和氮含量太高,也会产生底质富营养化问题。1961—1964年,笔者参加了福建省海岸带综合调查,对这些问题有了一定的认识。最近,参考了有关文献,写成本文。考虑到当初福建省的工农业生产水平还比较低,调查结果基本上可作为本区的环境基线值,供今后环境质量评价时对比之用。此外,本文对海洋化学、海洋地质、海洋生物和环境科学等研究也有一定的参考价值。更多还原

【Abstract】 The geochemical behaviour of organic matter and total nitrogen of surficial sediments in the South Fujian offshore waters have been studied. Relative low concentrations of organic matter and total nitrogen were found in the surficial sediments with average values of 0.83% and 0.048%, respectively.The horizontal isopleth of the concentrations is almost parallel with the coastline.Concentrations of organic matter and total nitrogen in the surficial sediments increase seawards in the north but decrease sea-wared in the south of the Lishi Islands.Concentrations in inlets are usually higher than those in open waters.Linear regression revealed the close correlation of organic matter with total nitrogen or with iron. The results show that the finner are the sediments, such as those with a large amount of <0.063 mm grains,the higher the concentrations of organic matter and total nitrogen.The paper also discusses the correlations of the distributions of organic matter,total nitrogen with the hydrodynamic conditions. An evaluation of the environmental quality indicated that the study area had not existed organic-pollution problem before the year of 1963.更多还原