饲料、体重对大黄鱼排氨率影响的初步研究

ake the yellow Croaker as the research object,we carried on an experiment to test how food and weight influence the ammonia nitrogen excretion.As a result of the food test, the group of yellow Croaker,which feed on different food , differs greatly in the Ammonia excretion rate(p<0.05). The Ammonia excretion rate is higher in the group which feed on the miscellaneous fish than that in the group which feed on the mixed feed, The groups feed on the miscellaneous fish reach at higher rates of 5.82±0.94 mg*h－1kg－1（116.7g）、4.80±0.48mg*h－1kg－1（204.9g）、3.43±0.53mg*h－1kg－1（313.5g） respectively,while the groups feed on the mixed feed reach lower rates of 5.82±0.94 mg*h－1kg－1（116.7g）、4.80±0.48mg*h－1kg－1（204.9g）、3.43±0.53mg*h－1kg－1（313.5g）respectively. The Ammonia excretion rates differ greatly in groups of different weight(p<0.05). The groups feed on the miscellaneous fish reach at rates of 7.68±2.12 mg*h－1kg－1（116.7g）、6.33±1.37 mg*h－1kg－1（204.9g）、4.53±0.98 mg*h－1kg－1（313.5g）respectively,while the groups feed on the mixed feed reach rates of 7.68±2.12 mg*h－1kg－1（116.7g）、6.33±1.37 mg*h－1kg－1（204.9g）、4.53±0.98 mg*h－1kg－1（313.5g）respectively.