关键词: 水产动物, 饥饿, 营养不足, 补偿生长

Abstract: A field survey on the Petridium revolutum growing on the Cu mining spoils in Yunnan Province and related greenhouse hydroponic sand culture experiment showed that when growing on the soil with an average Cu concentration of 2 432 mg·kg^-1 DW and the maximum Cu concentration of 7 554 mg·kg^-1 DW,P.revolutum had a large amount of aboveground biomass,with the maximum dry weight of 40.05 g·plant^-1 DW and the average dry weight of 18.33 g·plant^-1 DW.The average and maximum Cu contents were 201 and 567 mg·kg^-1 DW in aboveground biomass,and 346 and 1 723 kg^-1 DW in underground biomass,respectively.The transfer factor of Cu reached a maximum of 3.88,with an average of 0.81.Under quartz sand culture condition,P.revolutum could grow well when the Cu concentration in nutrient solution was 7 mg·L^-1.The accumulation of Cu by P.revolutum plant increased significantly with increasing Cu concentration,with the most of absorbed Cu concentrated in underground biomass.It was suggested that P.revolutum had a remarkable tolerance to Cu and a potential capacity of Cu accumulation,and could be used in the phytoremediation of Cu-polluted soils.

Key words: Aquatic animal, Starvation, Undernutrition, Compensatory growth