ChileanJAR

Two artificial calf feeding systems and two individual management systems were compared. Sixteen aulum born calves were (randomly) assigned the following irealments; in a complete randomized design wilh a laclorial arrangement (2 x 2) l. Whole milk unti! 60 days of age (T₁) and II. Whole milk unlil 40 days of age (T₂). Both trealmenls included two individual managemenl, on wood cage wilh groove Iloor (S₁) and straw bedding and lied lo Ihe neck (S₂). Twelve hours after birth, calves were started on the artilicial leeding. T₁ received 4 L/day of whole milk in two rations from 2^nd day lo 60^th day of age. T₂ received 4 L/day of whole milk in two rations during the lirsl 30 days and later received 2 L/day in one ration for the following 10 days. Allalla (2^nd cut) and starter was available lor all the animals during the lirst 90 days. The body weight at 90 days were 99,5 and 100,9 kg (P > 0,05) and 50,6 started intake and 94,9 kg (P < 0,001) for T₁ and T₂ respectively. Hay intake was 70,3 and 80,5 kg (P > 0,05) lor T₁ and T₂ respectively. Total dry matter intake was 138,9 and 168,1 kg for T₁ and T₂, respectively from 2 to 90 days of age. Higher starter intake Ihan hay was observed with calls in cages. It is possible lo do leeding with Iluid milk diet since 40^th days of age and slarted (21% P.T.): cost per kilogram of live weight gain were similar and Ihe system lo use will depend of the milk diel cost. The individual tight allow a good call perlormance but the type of leeding trough inlluenced the higher intake af the animal individual caga.