Effect of supplemental zinc methionine concentrations on digestibility , feed effeciency and some ruminal and blood parameters and performance of Friesian calves
Abstract: This study was conducted to investigate the effect of different levels (40mg, 80mg and 120mg /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) + berseem hay + rice straw) without zinc methionine supplementation. 2- The 1 sl tested group( G2) was f ed the control ration + 40mg zinc methionine / kg dry matter intake (DMI) . 3- The 2nd tested group (G3) was fed the control ration + 80mg zinc methionine /kg DMI 4- The 3rd tested group (G4) was fed the control rations + 120mg zinc methionine /kg DMI. . Results indicated that addition of zinc methionine increased (P<0.05) 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 /kg 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.
Publication year 2006
Pages 4927-4935
Availability location معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
Availability number
Organization Name
City المنصورة
serial title Journal Agicultural Science Mansoura University
ISSN 1110-0346
Author(s) from ARC
Agris Categories Animal feeding
AGROVOC
TERMS		 Blood composition. Calves. Digestibility. Feed intake. Performance testing.
Proposed Agrovoc zinc methionine;feed effeciency;
Publication Type Journal
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