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 | ||||
| Article 2, Volume 31, Issue 8, August 2006, Page 5015-5024 PDF (117.19 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2006.235602 | ||||
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| Authors | ||||
| l. M.E. Shakweer,; H. M. El-Nahas; A. A.M. EI-Mekass | ||||
| 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. | ||||
| Keywords | ||||
| Friesian calves —zinc methionine; feed intake and efficiency; digestibility — productive performance; ruminal and blood parameters | ||||
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