Triticale levels in rations for fattening Hereford steers

Claudio Rojas G.1, Adrián Catrileo S.1 y Alvaro Letelier I.2

During the autum-winter season 1986, for a 101 days period, thirty spring born Hereford steers 9 - 10 months old and 250 kg of liveweight, were fed with five different rations of triticale grain (Triticosecale Wittmack), red clover and ryegrass hay and rapeseed meal Carillanca Exp. Sta. (INIA, Temuco). Triticale grain was included at 0% (I), 15% (II), 30% (III), 45% (IV), and 60% (V), on a D.M. basis. Red clover and ryegrass hay and rapeseed meal were used in different proportions to complete each ration. Besides, minerals were offered at 1%. The rations were isoproteic. A completely randomized design was used, with six replications. Covariance analisis was according to inicial weight of steers. Results showed that the increment of triticale proportion in the ration was associated with the decrease in intake and the increase in liveweight, conversion efficiency and in the yielding percentage. Daily gains were 0.94b, 1.085b, 1.137a, 1.118a, and 1.178a kg (P < 0.05) for the five rations, respectively. Daily D.M. intakes were 7.9a, 7.9a, 7.6b, 7.3b, and 7.1 b kg; food conversion efficiencies were 8.5a, 7.3b, 6.7bc, 6.6bc, and 6.1c kg D.M./kg L.W.; carcass yield per cent were 56.4c, 58.6b, 60.3a; 60.8a and 60.9a for the sorne rations, respectively. The in vivo digestibility rates of D.M. were 65.8c; 66.6bc; 69.8ab; 72.3a and 70.6ab % correspondingly. Under experimental conditions, rations coud include a 30% of triticale.

1 Estación Experimental Carillanca (INIA), Casilla 58-D, Temuco, Chile.
2 Universidad Católica de Valparaiso, Casilla 4, Quillota, Chile.