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vol.61 número3EFECTO DE AVENILLA (Avena fatua L.) Y BALLICA (Lolium multiflorum Lam.) EN EL RENDIMIENTO DE TRIGO EN DOS ÁREAS AGROECOLÓGICASEFECTO DE LA FERTILIZACIÓN NITROGENADA INVERNAL SOBRE LA ACUMULACIÓN DE FORRAJE DE UN PASTIZAL NATURAL DE LA PAMPA DEPRIMIDA, ARGENTINA índice de autoresíndice de materiabúsqueda de artículos
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Agricultura Técnica

versión impresa ISSN 0365-2807

Resumen

HAZARD T., Sergio et al. Evaluation of corn silage and red clover silage mixed in different proportions in the winter feed of dairy cows in Southern Chile. Agric. Téc. [online]. 2001, vol.61, n.3, pp.306-318. ISSN 0365-2807.  http://dx.doi.org/10.4067/S0365-28072001000300006.

Corn silage mixed in different proportions with red clover silage was evaluated using dairy cows at the Carillanca Regional Research Center of the National Agricultural Research Institute (INIA), located in Temuco, Chile (38º 41’ South lat., 72º 25’ West long. at 200 m.o.s.l.). Eight autumn calving cows were assigned to each treatment for 70 days. The treatments consisted of three isonitrogenous rations: TI, 100% corn silage; TII, 66% corn silage and 33% red clover silage; and TIII, 33% corn silage and 66% red clover silage. In addition, all cows received 4 kg of alfalfa and 6 kg concentrate. The experimental design was a completely randomized block design and the statistical analysis was performed using repeated means. There was a significant statistical difference (P<0.05) observed in milk production between TIII and the other treatments, which disappeared when corrected to 3.5% milk fat. There were no treatment differences in milk composition. There were significant differences in dry matter intake and live weight between TI and the other treatments. The body condition was significantly different between treatments and the cows in TIII were the only ones who lost body condition as a result of being lighter from the beginning of the experiment. Finally, blood serum measures showed a significant difference for the enzyme (AST) aspartate amino transferace between TIII and the other treatments. There were no treatment differences in serum protein and serum albumin.

Palabras clave : corn silage; red clover silage; winter feeding; dairy cows.

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