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1997年5、8、11月及1998年3月对烟台四十里湾养殖水域营养盐的四个航次季节调查显示该水域营养盐的时空分布主要受陆源输入、养殖和自然生物活动及海流状况的影响。氮磷硅无机营养盐结构分析表明，烟台四十里湾春夏季硅限制了硅藻的生长；秋季氮为硅藻的相对限制因子，冬末春初硅是相对限制因子。
A four-season sectoral survey of nutrients in the aquaculture waters of Yantai in Sai Tze Wan in May, August and November 1997 and March 1998 showed that the temporal and spatial distribution of nutrients in the waters was mainly due to land-based inputs, aquaculture and natural biological activities and current conditions Impact. Structural analysis of N, P, N and N nutrients showed that silicon in spring and summer in Yantai Island restricted the growth of diatoms; nitrogen in autumn was the relative limiting factor of diatoms; and silicon in late winter and spring was the relative limiting factor.