1.College of Fisheries and Life Science,Dalian Ocean University,Dalian 116023,China;2.Seafood Seedling Breeding Base,Dalian Ocean Univer-sity,Dalian 116023,China
Abstract: The dynamics of physical and chemical factorswas studied in two typical kelp Laminaria japonica culture areas at Zhengmingsiand Dengshahe in Jinzhou aswell as the sewage outletnear the Dengshahe and thewater qual-ity was assessed in those regions in order to clarify the water quality of kelp culture areas.The results showed that the kelps grew well at water temperature of(5.90依5.10)益,Secchi disk transparency of(1.2依0.4)m,pH 8.12依0.09,and dissolved oxygen(DO)saturation>90%,with significantly lower levels of inorganic nitrogen (DIN)and soluble active phosphors(DIP)in themiddle and late cultivation period.Assessment by single factor pollution indexmethod revealed that the levels of DO,CODMnand pH in the three coastal areaswere in accordance with the national second-classwater quality standard,the DIN and DIP levels being excessive in the early cultiva-tion period,and thewater quality reachng or exceeding the criterion of the forth-class seawater.In the comprehen-sive trophic status,the poor trophic water body was found in the two sea cultivation areas,with nitrogen limit,eu-trophic water body at sewagemouth area,and high DIN level due to phosphorus limit.The evaluation of the organic pollution index indicated that80%of the water quality was good at the Denshahe,60%at Zhengmingsi,and only 40%at sewage outlet.It can be inferred that the kelp has good growth atappropriate fertilization during the cultiva-tion period according to the appropriate ratio of nitrogen to phosphorus.The findings provide a reference for perfec-ting the healthy breeding technology of kelp,accurate evaluation of the ecological effect of kelp farming and the ra-tional exploitation and utilization of the sea areas.
柴成林, 袁洪梅, 张瑜, 王晔, 杨凤, 孙丕海. 大连市金州海带养殖区理化因子动态及营养状况评价[J]. 大连海洋大学学报, 2017, 32(3): 342-348.
CHAICheng-lin, YUAN Hong-mei, ZHANG Yu, WANG Ye, YANG Feng, SUN Pi-hai, . An assessment of the dynam ics of physical and chem ical factors and trophic status in kelp culture area in coastal Jinzhou,Dalian. Journal of Dalian Ocean University, 2017, 32(3): 342-348.
2017, Vol. 32 
