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以浮游生物为主体的受控生态实验表明,溶解无机碳和DOC分别占海水碳贮库的89.75％和10.25％;在有机碳贮库中,浮游生物碳占5.43％,细菌碳占7.39％,表明细菌在海水碳循环中起重要作用,这种作用可从虾池样品分析获进一步证实。在食物链(14)C标记实验中,生物对碳吸收率随饵料密度增加而增加,由于饵料利用率的变化,应注意选择最适的饵料密度。鱼虾混养的~(14)C示踪实验表明:营养元素不断从低营养级向高营养级转移,各种生物样品~(14)C放射性活度平均百分比分别是,扁藻84.63％,卤虫8.99％,长毛对虾0.97％,棱鮻5.42％。
The controlled ecological experiments mainly on plankton showed that dissolved inorganic carbon and DOC accounted for 89.75% and 10.25% of the seawater carbon storage respectively; in the organic carbon storage, the amount of plankton carbon was 5.43%, bacterial carbon accounted for 7.39% This indicates that bacteria play an important role in the carbon cycle of seawater and this effect can be further confirmed by the analysis of shrimp pond samples. In the C-labeling experiment of food chain (14), the bio-absorption rate of carbon increased with the increase of feed density, and the optimum feed density should be selected due to the change of feed utilization rate. The ~ (14) C tracer experiments of polyculture of fish and shrimp showed that the nutrient elements continuously transferred from low trophic level to high trophic level. The average percentage of ~ (14) C radioactivity of various biological samples were 84.63% Artemia 8.99%, hairy shrimp 0.97%, Ridge 鮻 5.42%.