Treatment (diets) Day 0 A2 (day 56) B2 (day 56) C2 (day 56) D2 (day 56)
Minerals (%)  
Calcium 2.06 ± 0.04*a** 3.60 ± 0.13b 3.50 ± 0.01b 3.59 ± 0.18b 4.21 ± 0.01c
Phosphorus 1.16 ± 0.01a 1.79 ± 0.00c 1.84 ± 0.00e 1.82 ± 0.02d 1.80 ± 0.00b
Potassium 0.81 ± 0.01a 0.83 ± 0.00a 0.90 ± 0.02b 0.95 ± 0.02bc 0.97 ± 0.01c
Magnesium 0.16 ± 0.01a 0.20 ± 0.01c 0.22 ± 0.02d 0.19 ± 0.00b 0.21 ± 0.02c
Statistical differences within rows are shown with different superscript letters, (P<0.05) **.
Table 8: Whole body mineral composition of rainbow trout fingerling in first and fish fed graded dietary levels of inorganic K at the end of experiment ІІ (means ± std. error) .*
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