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2012 (Vol. 4, Issue: 6)
Article Information:

Purification Performance and Production of a Re-circulating Pond Aquaculture System Based on Paddy Field

Gu Li, Shi-yang Zhang, Ling Tao, Xiao-li Li, Jing-hua Song, Chun-xue Zhang and Jian-qiang Zhu
Corresponding Author:  Gu Li 

Key words:  Fish pond, grass carp, re-circulating aquaculture system, paddy field, , ,
Vol. 4 , (6): 383-388
Submitted Accepted Published
September 11, 2012 October 19, 2012 December 20, 2012
Abstract:

Developing improved aquaculture systems with a more efficient use of water and less environmental impact is becoming a crying need. A re-circulating aquaculture system consisting of paddy field and fish pond is a new culture mode due to aquaculture combing with agriculture. The present study focused on the purification capacity of the paddy field on nitrogen, phosphorus and organic matter, the fluctuation trend of water quality conditions during the whole rearing process and the culture efficacy of the main culture species of grass carp (Ctenopharyngodon idella). The results were as follows: under a flow rate of 1.4-5.5 m3/h for the recirculation treatment, the average removal rate of ammonia nitrogen, nitrate nitrogen, total nitrogen, total phosphorus and biochemical oxygen demand for the aquaculture effluent amounted to 40.5, 43.5, 31.9, 23.9, 20.7 and 52.4%, respectively, But the dissolved oxygen content in the rice fields increased obviously. During the whole process of fish rearing, the main physicochemical parameters of water quality for the experimental ponds were all maintained at a suitable level for the growth of the grass carp. In addition, there were significant differences (p<0.05) in DO, TSS, NH4+ -N, NO--N, BOD5 and Chl-&alpha between the experimental and control ponds. As far as the yield per unit and survival rate was concerned, the level of the experimental ponds was obviously higher than that of the control, while the feed conversion ratio displayed the opposite trend. Overall, the new aquaculture system realized the double aims of water reuse and the reduction of waste water discharge.
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  Cite this Reference:
Gu Li, Shi-yang Zhang, Ling Tao, Xiao-li Li, Jing-hua Song, Chun-xue Zhang and Jian-qiang Zhu, 2012. Purification Performance and Production of a Re-circulating Pond Aquaculture System Based on Paddy Field.  Advance Journal of Food Science and Technology, 4(6): 383-388.
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ISSN (Print):   2042-4868
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