Year

TN

TP

WEP

TK

mg·L⁻¹

2017

5.12 ab^φ

0.93 c

0.40 d

17.58 a

2018

3.09 b

1.33 bc

0.81 cd

15.91 a

2019

5.83 a

2.29 a

1.68 a

16.59 a

2020

4.05 ab

1.62 b

1.28 ab

17.41 a

2021

2.76 b

1.31 bc

0.96 bc

13.63 a