Nutrient assessment of sediments of carp fish ponds
2011
Hadjinikolova, L., Institute of Fisheries and Aquaculture, Plovdiv (Bulgaria) | Terziyski, D., Institute of Fisheries and Aquaculture, Plovdiv (Bulgaria)
The aim of this study is related with the characterization of chemical parameters of organic nitrogen and biogenic elements in sediments of carp ponds, permitting an assessment of their nutritional value. A vertical differentiation was established in the levels of the surveyed chemical indicators of the sediments. In the 0 cm - 15 cm horizon the content of organic nitrogen is on average 47.95% higher, and that of ammonium and nitrate ions is on average of 34% - 37.85% higher compared to that registered in the 15 cm - 30 cm horizon. The content of phosphate ions is 13.1% higher in 15 cm - 30 cm horizon in comparison with the 0 cm - 15 cm horizon. Based on the reported levels of organic nitrogen, soluble inorganic forms of nitrogen and phosphorus, the reserve of bottom sediments is determined as average to good. This characterizes them as a natural source of nutrients with the possibility of their integration in agriculture.
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