Publication Date:
2021-05-19
Description:
Currently, different kinds of chemical fertilizer such as urea, nitrate, sulphate and ammonium phosphate –potash are using in fish ponds of carp (Hypophthalmychthysmolitrix, Hypophthalmychthysnobilis). Chemical fertilizers, especially phosphate fertilizers can cause environmental pollution. Therefore, the use of alternative one, particularly organic fertilizer (manure) can reduce environmental issues. This study is conducted to effects of liquid cow manure on abundance, biomass and community structure of phytoplankton, zooplankton, physico-chemical chractrestics and heavy metal of water in the warm water fish ponds. For this purpose, the effects of three different types' fertilizers have been searched on fish ponds water. The ponds number 1 and 3 treated by chemical fertilizer and liquid cow manure respectively. Both of the two fertilizers (liquid cow manure and chemical fertilizer) were used in the pond number 2. Results showed that acidity of liquied cow manure was low (pH=7-8), however the total hardness and alkalinity were high. Meanwhile, percent of nitrogen were more than percent of calsium and phosphorus liquid cow manure. The concentrations of Pb, Fe and Zn elements were higer than critical level but some of them such as Cd, Cr, and Hg were lower than detection limit. As a conclusion, biomass of phytoplankton, zooplankton and physico-chemical parameters in fertilized pond treated by liquid cow manure were more convinence than pond treated by chemical fertilizers.
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Physico-chemical
;
Heavy metals
;
Plankton
;
Warm water
;
Ponds
;
Cow dung
;
Fertilizer
;
Urea
;
Nitrate
;
Ammonium
;
Hypophthalmychthysmolitrix
;
Hypophthalmychthysnobilis
;
Environmental pollutions
;
Phytoplankton
;
Zooplankton
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
54pp.
Permalink
