北海湾无机氮的分布及其与环境因子的关系

根据１９９８年１０月和１９９９年１月、４月、８月的调查资料，对北海湾无机氮的特征分布及其与环境因子（ｐＨ、ＤＯ、盐度和叶绿素ａ）之间的关系进行了初步探讨。结果表明，影响北海湾无机氮含量分布的主要因素是沿岸冲淡水，其次是生物活动；通过Ｎ／Ｐ值分析，表明了Ｎ为该湾秋冬季节初级生产力的限制因子，而Ｐ则为该湾春夏季节初级生产力的限制因子。

Distribution of inorganic nitrogen and its relationship to environmental factors in Beihai Bay

Based on the quarterly investigation materials from Oct. 1998 to Aug. 1999, a preliminary probe into the characteristic distribution of inorganic nitrogen in Beihai bay and its relationship to the environmental factors (including pH,DO, S and chlorophyll a) were carried out. The results showed that the main factors affecting the distribution of inorganic nitrogen were coastwise fresh water runoff and biotic activities, and the former was more important. The analysis by N/P ratio showed that N was a limited factor on the primary productivity in autumn and winter, but P was in spring and summer.