Determination of nutrients, BOD and COD in manured polyculture ponds
In experimental ponds total ammonia solution, total nitrogen, phosphate and inorganic carbon varied between 0-1050), 178-1093, phosphate 0-88 and 130-5410 ug/lit) respectively. During the growing season the total amount of nitrogen (N), phosphate (P) and carbon (C) were fluctuating between (0.7-1.9), (0.062-2.05), (49.71-130) mg/gr. The primary variation range was 0.98 and 8.9 carbon/m2 per day, COD was 11-109 and BOD was 0.4-16.35 mg/lit oxygen. The results showed that in spite of using inorganic manures 100-150 kg/ha per day, the ponds still had the ability of digestion of inorganic carbon, nitrogen and phosphorus. In the majority of the ponds the rate of total sediment of inorganic C and P were increased during growing period. We can use also COD and BOD as the manuring rate indicator in fish pond ecosystems.
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| Format: | article biblioteca |
| Langue: | Persian |
| Publié: |
1999
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| Sujets: | Chemistry, Nutrients, BOD, COD, Polyculture, Iran, |
| Accès en ligne: | http://hdl.handle.net/1834/38676 |
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