Kamal,, S., Agouz, H. (2006). PRODUCTION OF NILE TILAPIA (Oreochromis niloticus) AND SILVER CARP (Hypophthalmichthys molitrix val.) IN EARTHEN PONDS FERTILIZED BY BLUE GREEN ALGAE AND POULTRY MANURE. Journal of Animal and Poultry Production, 31(6), 3389-3396. doi: 10.21608/jappmu.2006.235499
S. M. Kamal,; H. M. Agouz. "PRODUCTION OF NILE TILAPIA (Oreochromis niloticus) AND SILVER CARP (Hypophthalmichthys molitrix val.) IN EARTHEN PONDS FERTILIZED BY BLUE GREEN ALGAE AND POULTRY MANURE". Journal of Animal and Poultry Production, 31, 6, 2006, 3389-3396. doi: 10.21608/jappmu.2006.235499
Kamal,, S., Agouz, H. (2006). 'PRODUCTION OF NILE TILAPIA (Oreochromis niloticus) AND SILVER CARP (Hypophthalmichthys molitrix val.) IN EARTHEN PONDS FERTILIZED BY BLUE GREEN ALGAE AND POULTRY MANURE', Journal of Animal and Poultry Production, 31(6), pp. 3389-3396. doi: 10.21608/jappmu.2006.235499
Kamal,, S., Agouz, H. PRODUCTION OF NILE TILAPIA (Oreochromis niloticus) AND SILVER CARP (Hypophthalmichthys molitrix val.) IN EARTHEN PONDS FERTILIZED BY BLUE GREEN ALGAE AND POULTRY MANURE. Journal of Animal and Poultry Production, 2006; 31(6): 3389-3396. doi: 10.21608/jappmu.2006.235499
PRODUCTION OF NILE TILAPIA (Oreochromis niloticus) AND SILVER CARP (Hypophthalmichthys molitrix val.) IN EARTHEN PONDS FERTILIZED BY BLUE GREEN ALGAE AND POULTRY MANURE
Dept. of Aquaculture, Central Laboratory for Aquaculture Res. at Abassa, Sharkia Governorate, Agriculture Research Center
Abstract
This study has been carried out to investigate the growth performance and economic efficiency as well as pond productivity of Nile tilapia (Oreochromis ni/oticus) and silver carp (Hypophtha/michthys mo/itrix vaL) reared in polyculture earthen ponds as affected by different fertilizing inputs. Nile tilapia and silver carp fingerlings averaging 0.5 g in weight were assigned randomly to two tested different fertilized inputs. Two treatments were applied in the earthen ponds. (T1) fresh blue green algae at a rate of one collecting algae pond (3kg) every day/fish pond (5 days 1 week) and (T2) fertilization with chicken manure 25 kg 1 pond every 2 weeks. Four earthen ponds each measuring 20x50 m were used in the experiment. Each treatment was performed in duplicate. All the ponds were stocked with 2500 tilapia plus 500 silver fish 1 pond (12600/feddan). The study extended 90 days. Results obtained can be summarized in the following: 1- The highest final body weight, average daily gain (AOG) and specific growth rate (SGR), were recorded for Nile tilapia fish group in T1. While a reverse trend was observed with silver carp which exhipted the highest final body weight, AOG and SGR with Tz. 2- With regard to economic efficiency, the total cost of T2 was higher than Tl but a net return of Tl was higher than T2.
In conclusion, the use of fresh blue green algae in fish pond culture could be recommended for Nile tilapia and silver carp at a rate of one collecting algae pond (3kg) every day/fish pond (5 days 1 week) with stocking density 126001 fedd. Especially with the problems found now for poultry manure.
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