Shakweer,, L., El-Nahas, H., EI-Mekass, A. (2006). EFFECT OF SUPPLEMENTAL ZINC METHIONINE CONCENTRATIONS ON DIGESTIBILITY, FEED EFFICIENCY AND SOME RUMINAL AND BLOOD PARAMETERS AND PERFORMANCE OF FRIESIAN CALVES.. Journal of Animal and Poultry Production, 31(8), 5015-5024. doi: 10.21608/jappmu.2006.235602
l. M.E. Shakweer,; H. M. El-Nahas; A. A.M. EI-Mekass. "EFFECT OF SUPPLEMENTAL ZINC METHIONINE CONCENTRATIONS ON DIGESTIBILITY, FEED EFFICIENCY AND SOME RUMINAL AND BLOOD PARAMETERS AND PERFORMANCE OF FRIESIAN CALVES.". Journal of Animal and Poultry Production, 31, 8, 2006, 5015-5024. doi: 10.21608/jappmu.2006.235602
Shakweer,, L., El-Nahas, H., EI-Mekass, A. (2006). 'EFFECT OF SUPPLEMENTAL ZINC METHIONINE CONCENTRATIONS ON DIGESTIBILITY, FEED EFFICIENCY AND SOME RUMINAL AND BLOOD PARAMETERS AND PERFORMANCE OF FRIESIAN CALVES.', Journal of Animal and Poultry Production, 31(8), pp. 5015-5024. doi: 10.21608/jappmu.2006.235602
Shakweer,, L., El-Nahas, H., EI-Mekass, A. EFFECT OF SUPPLEMENTAL ZINC METHIONINE CONCENTRATIONS ON DIGESTIBILITY, FEED EFFICIENCY AND SOME RUMINAL AND BLOOD PARAMETERS AND PERFORMANCE OF FRIESIAN CALVES.. Journal of Animal and Poultry Production, 2006; 31(8): 5015-5024. doi: 10.21608/jappmu.2006.235602
EFFECT OF SUPPLEMENTAL ZINC METHIONINE CONCENTRATIONS ON DIGESTIBILITY, FEED EFFICIENCY AND SOME RUMINAL AND BLOOD PARAMETERS AND PERFORMANCE OF FRIESIAN CALVES.
Animal Production Research Institute, Agricultural Research Center, Ministry of Agric., Giza. Egypt.
Abstract
This study was conducted to investigate the effect of different levels (40mg,
80mg and 120mg r'kg DMI) of zinc methionine supplementation on the digestion
coefficients, nutritive value, ruminal and some blood parameters and productive
performance of Friesian calves . Animals were fed according to requirements of the
NRC (1984). Twenty growing Friesian calves of average initial live body weight (154.5
kg). aged 5 months were divided into four similar groups (5 calves each ) and fed on
the following rations: 1- The control group (G1) was fed concentrate feed mixture
(CFM) + berseern hay + rice straw )without zinc methionine supplementation . 2- The
15‘ tested group( G2) was fed the control ration + 40mg zinc methionine ikg dry
matter intake (DMI) . 3- The 2"lcl tested group (G3) was fed the control ration + 30mg
zinc methionine ikg BM! 4- The are tested group (G4) was fed the control rations +
120mg zinc methionine ikg DMI. . Results indicated that addition of zinc methionine
increased (P-CODS) the digestibility of all nutrients which was reflected on the nutritive
values (as TDN and DCP) .However, the daily gain of growing Friesian calves given
80mg zinc methionine supplementation was higher than that of the other tested
groups fed the zinc levels and the control group. Total protein and volatile fatty acids
(TVFA's ) were increased by increasing the level of znic methionine supplementation
in the ration, However, ammonia and albumin were decreased.
Generally , it could be concluded that addition of 80 mg zinc methionine lkg
DMI improved nutrient digestibility , feed efficiency and daily gain for growing Friesian
calves.
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