Abstract
In order to know the effects of micropore oxygen aeration on the water quality and economic output, take each 3 of micropore oxygen aeration (experimental pond) and impeller oxygenation (control pond) to make the comparison, indexs of two different aeration methods water were detected from May, 2012 to October, 2012. Such as water temperature, dissolved oxygen, ammonia nitrogen and nitrite, phytoplankton, chemical oxygen demand (COD<sub>Mn</sub>). Results showed that, (1) the indexes of the dissolved oxygen, ammonia nitrogen, chemical oxygen demand (COD<sub>Mn</sub>) and nitrite of the experimental pond are all superior to that of the control pond, of which the concentration of the dissolved oxygen of the experimental pond is 8.37 mg/L which is higher than that of the control pond (5.7 mg/L). And, COD<sub>Mn</sub> in the experimental pond is 7.54 mg/L, lower than that in the control pond (10.19 mg/L). The difference between the control pond and the experimental pond was statistically significant (p<0.01). The ammonia nitrogen of the experimental pond is 0.1 mg/L, obviously lower than the control pond (0.16 mg/L). Besides, the nitrite is 0.13 mg/L in the experimental pond, lower than that of the control pond (0.21 mg/L). (2) Compared with the control pond, the experimental pond has quite higher general abundance of algae, with about 5.69×10<sup>8</sup> ind/L. Yet, there is no obvious difference between them. (3) Compared to the impeller oxygenation, the micropore oxygen aeration technology can be better to increase the dissolved oxygen in the aquaculture pond and improve the water quality. However, there is no significant influence to the phytoplankton abundance and diversity.
Highlights
In the aquaculture environment of the pond, the dissolved oxygen, as one of the important factors for the water quality indexes, directly has the significant influence to the cultured organisms and makes other chemical indexes and biological population change through affecting the microorganisms
There is no significant difference in water temperature, transparency and pH value in the micropore oxygen aeration fishpond and impeller oxygenation pond
Analysis of planktonic algae: The composition of planktonic algae: Through 6times sampling, the results showed that 72 species and varieties of phytoplankton had been identified, which belong to 33 genera, 22 families and 7 categories
Summary
In the aquaculture environment of the pond, the dissolved oxygen, as one of the important factors for the water quality indexes, directly has the significant influence to the cultured organisms and makes other chemical indexes and biological population change through affecting the microorganisms. The micropore aeration oxygenation, as a kind of inflatable styles which takes the air inflation from the bottom of the pond, is widely applied in the cultivation production (Cai et al, 2012). This technology can obviously enhance the dissolved oxygen of the cultivated water, improve the pond cultivated ecological environment and reduce the possibility of the occurrence of the diseases, which contributes to the growth of the aquatic animals. This study makes the comparative test of the influences of micropore oxygen aeration and impeller oxygenation to the environment of the water quality, providing the reference for improving the cultivated environment of the pond
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