渤海海域营养现状研究

主要根据１９９２～１９９３年调查资料，分析了影响渤海营养状况的主要因子。结果表明：与历史同期调查结果相比，无机氮有所上升，无机磷下降较大，与国内外有关浮游植物对营养盐类的最低需求的适宜浓度相比，除冬季外，其他季节无机氮和无机磷均低于浮游植物所需要的最适浓度值。就Ｎ／Ｐ比值而言，仍低于海水的正常Ｎ／Ｐ比值，无机氮仍为渤海浮游植物生长繁殖的主要限制因子。无机磷除冬季外，也低于其浮游植物生长繁殖的最低浓度的下限，故认为无机磷也起一定的限制作用。

STUDY ON EVALUATION OF NUTRIENT STATUS IN THE BOHAI SEA

This paper is mainly based on the our country's 1985 "Survey on Bobai SeaMrine Productivity". Systematic analysis of the results showed that:(1)Nitrite-N, NitrateN, phosphate-p are the main factors affecting the nutrient condition of the Bobai Sea;(2) Thecontent of inorganic nitrogen is tending to increase, but the content of inorganic phosphorus is decreased greatly compared with historical data of the corresponding period;(3) The content inorganic nitrogen and phosphorus are lower than the lowet limit of optimum concentration requiredby phytoplankton (except in winter).(4) The N/P ratio (atomic ratio) is lower than the normalN/P ratio of seawater, the inorganic nitrogen is still the main limiting factor affecting phyto-plankton growth and reproduction.