【摘要】 温带海域普遍养殖仿刺参,仿刺参养殖塘中常有大型藻类爆发,进而影响仿刺参的生长和生存。通常用扑草净清除大型藻类,由于除草剂的生态毒性,可推断扑草净将影响仿刺参生物沉积物中营养盐的再生,本研究则要验证该假说。将仿刺参生物沉积物暴露于不同浓度的扑草净7天,并测定生物沉积物-水界面营养盐的扩散通量。结果表明:在正常使用的去除大型藻类的扑草净剂量之下,营养盐在仿刺参生物沉积物-水界面的扩散通量不受扑草净的影响。按正常剂量使用扑草净并不影响仿刺参生物沉积物中营养盐的再生与积聚,无需对扑草净对营养盐水平的影响而担忧。研究结果将有助于评估除草剂对海水中营养盐循环的影响。更多还原

【Abstract】 Sea cucumber is cultured generally in temperate zone. Macroalgae may outbreak in sea cucumber culture ponds, which influence its survival and growth. Macroalgae are killed by prometryne generally. It issupposed that prometryne might affect the nutrients regeneration in biodeposition because of herbicide toxicity.To evaluate the hypothesis, the sea cucumber feces were exposed to prometryne with different concentrationsfor 7 days and the nutrients diffusion fluxes across the biodeposition-water interface were studied. The resultsshowed that the nutrients diffusion fluxes across the biodeposition-water interface and the construction ofnutrients released from the biodeposition were not influenced by prometryne of normal dosage used to controlmacroalgae, hence, the prometryne could not affect the regeneration/accumulation of nutrients in biodeposition.It is no necessary to worry about the utilization of prometryne in sea cucumber culture ponds. Results of thepresent work may shed light on evaluating effects of herbicide on nutrients cycle in seawaters.更多还原