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【答案】应助回帖
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爱与雨下(金币+1): 2011-11-21 08:46:46
171303240(金币+65, 翻译EPI+1): 还不错，谢谢了 2011-11-21 12:10:36
【完整版】
The incoming and outcoming of nitride and phosphor is considered as an effective method of evaluating the importance of nitride and phosphor in acquaculture, the efficiency of transform and the degree of the pollution in culture. Its main focus is the quantity relationship of incoming and outcoming of nitride and phosphor of each ingredient, and the ecological factors and the different mixed-culture model ,such as temperature density and flux volume ,which influence the incoming and outcoming of nitride and phosphor, thereby constituting the effective culture model and increasing the transforming efficient of nitride and phosphor and the profit of ecological culture.
5)Based on incoming and outcoming of nitride and phosphor, the balance formula of the sea-water recycle culture system is established in which it is found that the assimilation rate of nitride and phosphor in 26℃ group is 40.87 % and 37.92% and significantly higher than other groups(P<0.05), it indicates that it is most optimum temperature for the Epinephelus coioides in 26℃; the assimilation rate of nitride and phosphor in 30ind/m2 group is significantly higher than other groups and the ratio of soluble nitride is 6.58%(P<0.05), significantly lower than other groups, it indicates that it is most optimum culture density for the Epinephelus coioides on the density condition of 30 ind·m-2 ; the assimilation rate of nitride and phosphor in 4times/h group is higher than other groups; the more the times of recycles, the higher outcoming rate there is in the granule organic substance; there is no significant difference between fish & shellfish mixed-group and fish & shellfish & algae mixed-group(P>0.05), but the loss rate of nitride of fish & shellfish mixed-group is 2.3 fold to the latter group.
According to the results demonstrated before, we consider that the optimum condition is 26℃ of water temperature, 30ind/m2 of culture density and 4 cycles/h and the optimum culture model is fish & shellfish & algae mixed-group. |
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