(2016). EFFECT OF SEMI-CLOSED AND CLOSED HOUSING SYSTEMS ON LAYERS PRODUCTION AND ECONOMICAL PERFORMANCE. Egyptian Poultry Science Journal, 36(4), 931-948. doi: 10.21608/epsj.2016.11379
. "EFFECT OF SEMI-CLOSED AND CLOSED HOUSING SYSTEMS ON LAYERS PRODUCTION AND ECONOMICAL PERFORMANCE". Egyptian Poultry Science Journal, 36, 4, 2016, 931-948. doi: 10.21608/epsj.2016.11379
(2016). 'EFFECT OF SEMI-CLOSED AND CLOSED HOUSING SYSTEMS ON LAYERS PRODUCTION AND ECONOMICAL PERFORMANCE', Egyptian Poultry Science Journal, 36(4), pp. 931-948. doi: 10.21608/epsj.2016.11379
EFFECT OF SEMI-CLOSED AND CLOSED HOUSING SYSTEMS ON LAYERS PRODUCTION AND ECONOMICAL PERFORMANCE. Egyptian Poultry Science Journal, 2016; 36(4): 931-948. doi: 10.21608/epsj.2016.11379
EFFECT OF SEMI-CLOSED AND CLOSED HOUSING SYSTEMS ON LAYERS PRODUCTION AND ECONOMICAL PERFORMANCE
This study was carried out to investigate two main table-egg production systems, semi-closed and closed and their effect on some productive traits of laying hens in Al-Sharkia governorate. Two commercial table-egg production farms were surveyed, one farm of semi-closed system named Ebrahemia and another farm of closed system was Salhia, both farms have layers flocks from Lohmann brown (L.B) strain. Completed three production cycles data from year 2011-2015 were obtained of each one and compared with others and with their standards. The comparison between Ebrahemia and Salhia farms with Lohmann brown strain under semi- closed and closed systems respectively, at age of 52 wks of production and also at the end of production cycle indicated that hens kept under closed system had significantly the best age (day) at 50% of production, mortality percentage, hen day %, hen housed egg number, while feed conversion (g / Egg) and hen housed percentage were also better under the closed system than the semi closed system but the differences were not statistically significant. In General, production efficiency coefficient value was significantly higher (364.79 and 326.13) for Salhia farm than Ebrahemia farm (286.94 and 274.12) at (52 wks and the end) of production cycle, respectively. Moreover, the economical study showed the significantly superiority of closed system‘s economical efficiency characters than the semi-closed, the efficiency of every spent pound was better in the closed system, while the difference of layer cost was not significant. Finally, results indicated that Lohmann brown layers showed more efficient production performance under closed system than semi- closed system in Al-Sharkia governorate.
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