N level

Week

N mean removal (mg/L)

N content at the end of 5th week (mg/L)

% removal at the end of 5th week

Total nitrogen (mg/g) in tissues

5 (mg/L)

1

6.39d

2.54a

49

20.33a

15 (mg/L)

2

2.56c

6.12c

59

20.40a

25 (mg/L)

3

0.5ab

5.14b

79

21.67a

4

0.68b

5

0.27a