Effects of different levels of limning at morning on water quality of cultured carp ponds

During this study, the effect of morning liming on water quality of cultured carps in Dikjeh area of Gonbad was investigated. Nine ponds (3 hectars) were chosen and divided to 3 treatments including; (1-liming 750 mg/l, 2-liming 1250 mg/l and 3-liming 1750 mg/l). Limning was done at 7 and 8 oclock in the morning and weekly. In definite intervals, sampling from water was done and physicochemical conditions of water were investigated. According to our results, liming had significant effect on hardness (P