EFFECT OF REPLACING YELLOW CORN WITH DIFFERENT LEVELS OF SOME UNTRADITIONAL ENERGY SOURCES IN RATIONS ON LAYING HENS PERFORMANCE | ||
| Egyptian Journal of Agricultural Research | ||
| Article 24, Volume 83, Issue 2, July 2005, Pages 873-889 PDF (3.6 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2005.246365 | ||
| Authors | ||
| AHMED M. ABBAS1; ABDEL-BASER H. RAYA2; MAGDY A. A. HUSSIEN1 | ||
| 1Animal Production Research Institute, Agricultural Research Center, Ministry of Agriculture, Dokki, Giza, Egypt | ||
| 2FacuIty of Agriculture, Mansoura University, Mansoura, Egypt | ||
| Abstract | ||
| A total of 270 Kamm chickens (243 hens and 27 cods) of 24 weds old were randomly divided into 9 triplicate grotps (10 birds X 3 reptrats X 9 treats). The ;notate contains one clod and nine hens. They were reared In conventional floor brooder houses and fed the experimental diets for 24 weeks experimental perbd. Nine eseimental diets were fern dated In velch the first (71) contained yellow com (YC) and soybean meal (513M) as the main sources of energy and protein, respectively. In the other diets YC in T1 was replaced by ether sorghum grabs (56) a cassava root meal (CRM) at substitution levels of 25 % (17 and 76, respectively), 50 % (73 and 77, respectively), 75 %(T4 and T8, respectively) and 100% (75 and 79, respectkey). Al diets were adjusted to be So-nitrogenous of about 16 % CI' and iso-caloric of a bout 2800 Kcal ME/Kg. kadn9 hen performance, egg fertility and hatchability were measured. A metabolism trial was also carried out to deb:mine the nubient digessobilities and metabolizabilitres of the eseinental amts. The obtained results showed that, there were no significant diffeeim...., between the control group and those of 25 and SO % substitution levels of either SG a CRM for YC in Rve body weight, weight gain, egg production, feed conversion, fertility, hatchability and economic of deny which significantly surpassed those of 75 and 100 % replacement. No significant differences were found among all treatments in egg weight, feed Intake and measurements of egg quality swept yolk colour which gradually deceased with the increase in substitution level of SG or MM. Birds fed on the cored diet and those fed on 25 and 50 % substitution levels of SG or CRM on the emense of YC resulted in significant better digestibikty and metabolinbilty values than those on 75 and 100 % subsatution levels. With the exception of some significant differences Si concentration of plasma calcium and phosphorus, no significant diferemes were detected among all dietary treatments Si concentration of plasma total protein, total lipids, glucose and cholestrol a in that of Motel hemoglobin and also in hernatoo-it value. In conclusion, when the perfemance of laying has are put into consideration in addition to the economic effidency, it appears that, either SG a CRM an be incorporated In layer diets at a | ||
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