Studing Effect Of Weaning Different Times On Calves Growth And Evaluating The Operation Of Cow House Units In Golpayegan Region

In order to decrease fostering cost and used better milk in feeding dairy calves, Possibility decrease weaning age calves in golpaygan area were investigate. This a completely randomized design with a 3 *2 factorial arrangment with three treatments (Weaning age) 8, 10, 12 week with repetition 48 (ma 124, fema 124) and in two step, one step of birth till three month and with feeding control and two step of three month until six month and with feeding adlibitum on 144 dairy calves and in rural circumstances in golpaygan area were conculuded. Treatment 1 and 2 were fed of 2 week until 3 month with starteR with 18% protein and 2.9 mcal/kg Metabolic energy containing soybean meal 25.5% and corn yellow 41% and barley 29.5% and limestone 1 % and all treatment of 2 week given access adlibitum to alfalfa dry. Of age three month until six month for study affect first periods on next growth calves were fed with rural circumstance. In one month three use milk, starter and alfalfa calves individul were control and weighing and calves early born and until 6 month one time monthly were weight. Between average gain's treatment 1 and 2 and 3 in 1 month. (9. 71, 10. 6, 10.44 kg) and 2 month (14.3, 15.7, 15.1 kg) and 3 month (16.6, 14.9, 15.8 kg) were not significantly different (P 0.05). But average gains 4 month treatments 1 and 2 and 3 espectively 16.05, 16.181, 10.41 kg were that were significant different (P 0.05) among growth treatment 3 with treatments 1 and 2 and between average weight gain's treatments 1 and 2 were not Significantly different (P 0.05). in the other hand growth treatment 3 in 4 month in comparison with treatments 1 and 2 were decreased. But this decreased was compensated. As between average total gain's treatments until 6 month were not significantly different (P 0.05). In all treatments affect birth weight on weights 1 until 6 month were significant (P 0.05). Benefit early weaning in 2 month in comparison with 3 month in time Experiment for one calf were 49750 rials. (Key words:Caif,early weaning, conventional weaning,starter,humanity partner ship).