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  3. 364-378
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Journal of Fisheries and Aquatic Science

Year: 2012 | Volume: 7 | Issue: 6 | Page No.: 364-378
DOI: 10.3923/jfas.2012.364.378

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Authors


Sunila Rai

Country: Thailand

A.M. Shahabuddin

Country: Thailand

Yang Yi

Country: Thailand

A.N. Bart

Country: Thailand

James S. Diana

Country: USA

Keywords


  • periphyton
  • water quality
  • loading rate
  • Rice straw
Research Article

Effect of Various Loading Rates of Rice Straw on Physical, Chemical and Biological Parameters of Water

Sunila Rai, A.M. Shahabuddin, Yang Yi, A.N. Bart and James S. Diana
An experiment was conducted to assess the effect of different loading rates of rice straw on the physical, chemical and biological parameters of fertilized water in 21 cemented tanks for 35 days using seven treatments with three replicates. Treatments were: Control (T1), rice straw mats with loading rate of 625 kg ha-1 (T2), 1,250 kg ha-1 (T3), 2,500 kg ha-1 (T4), 5,000 kg ha-1 (T5), 10,000 kg ha-1 (T6), 20,000 kg ha-1 (T7) on dry weight basis. Result showed that water quality deteriorated with increased loading rates of rice straw. Dissolved oxygen and pH were significantly lower in rice straw treatments than control. Transparency was significantly higher in the treatment T4 and lower in treatment T7. Total alkalinity, total ammonia, nitrite, TKN, total phosphorus, TSS, TVS and chlorophyll-a in treatment T7 was significantly higher than other treatments (p<0.05). Plankton, periphyton densities and bacterial load did not differ significantly among treatments. Dry matter and ash free dry matter of periphytons were significantly higher in the treatments T2, T3, T4 and T5. Chlorophyll-a concentration of periphytons was significantly higher in the treatment T3 than in the treatment T6 and T7. To sum up it can be said that the loading rate of 625 kg ha-1 appeared to be best among treatments. However, the experiment was carried out in tank without fish, so, effects of decomposition on fish growth and production needs to be assessed in ponds.
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How to cite this article

Sunila Rai, A.M. Shahabuddin, Yang Yi, A.N. Bart and James S. Diana, 2012. Effect of Various Loading Rates of Rice Straw on Physical, Chemical and Biological Parameters of Water. Journal of Fisheries and Aquatic Science, 7: 364-378.

DOI: 10.3923/jfas.2012.364.378

URL: https://scialert.net/abstract/?doi=jfas.2012.364.378

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