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中文摘要：
分析了南海62个表层沉积物样品中生源（有机质、碳酸钙和蛋白石）和非生源（岩源物质）组分的含量变化和分布特征，并以沉积学分区为基础，结合5个沉积物捕获器站位，将南海划分为N、C-NE、SW和S4个区域，对比分析了各区表层沉积物和水柱中沉降颗粒物中各组分含量、沉积通量分布特征和变化，探讨了表层沉积物的输出生产力、沉降颗粒物的初级生产力及真光层下100m输出生产力三者之间的对应关系。结果显示：南海4个海域表层沉积物中各组分平均含量多数低于沉降颗粒物中的平均含量，而碳酸钙、岩源物质的沉积通量却多数高于沉降颗粒物中的沉积通量，分析得出表层沉积物中各组分平均含量和沉积通量不仅受水柱中各组分输出量影响，还受到陆源物质输入、溶解作用和上层水体营养盐影响。南海表层沉积物中生源组分沉积通量大小对应其输出生产力的大小。但是，由于陆源有机质、生源颗粒侧向漂移的影响，表层沉积物的输出生产力大小分布并不完全对应沉降颗粒物的初级生产力大小分布，尽管南海真光层下100m输出生产力与沉降颗粒物的初级生产力比值与世界大洋“厂”比平均值基本一致，但是，明显低于表层沉积物的输出生产力大小，只有在沉降颗粒物的初级生产力较高区域，真光层下100m输出生产力大小才最接近表层沉积物的输出生产力大小。
英文摘要：
The contents and distribution patterns of biogenic （carbonate, opal and organic carbon） and nonbiogenic （lithogenic matter） components in total 62 surface sediment samples which were taken from the South China Sea （SCS） are analyzed. Based on the sedimentary characteristics and the locations of deploying sediment traps, the SCS is divided into the N, C-NE, SW and S four subareas. Contents, depositional fluxes and distribution patterns of different components in surface sediments are correlated with those in sinking particulate matters and the relationship between export productivity from surface sediments, primary productivity from sinking particulate matters and export productivity at 100 m depth under euphotic zone is discussed. The results show that the average contents of most components in surface sediments are lower than those in sinking particulate matters, but the most depositional fluxes of carbonate and lithogenic matter in surface sediments are higher than those in sinking particulate matters. The average contents and depositional fluxes are not only influenced by the export level of each component from the water column, but also by the upper nutrition condition, terrestrial matter import and dissolution. The depositional fluxes of biogenic components in surface sediments are found to correspond to export productivity from surface sediments. However, influenced by terrestrial organic matter import and lateral drift of sinking bi- ogenic particulate matters, the export productivity from surface sediments does not correspond perfectly to the primary productivity from sinking particulate matters. The export productivity at 100 m depth under euphotic zone is apparently lower than export productivity from surface sediments in the SCS although the ratio of export productivity at 100 m depth under euphoric zone to the primary productivity from sinking particulate matters consists basically with the average ＂f＂ ratio of world ocean.
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