ABSTRACT
Milk production potencial from irrigated pastures in the IX region of Chile

Norberto Butendieck B.1, Sergio Hazard T.1, Gúnther Stehr H.2 y Francisco Lanuza A.3
 

Milk production potential of irrigated permanent pastures, established on an Andisol, Vilcún series, composed mainly by Lolium perenne L., Lolium multiflorum L., and Trifolium repens L. was studied at Carillanca Experiment Station (INIA), Temuco, Chile, during 2 years. The pasture was rotationally grazed exclusively by lactating Friesian cows. Milk production from 4 hawas recorded and equated to the nutrient requirements of dairy cattle (NRC, 1988). Supplemental feeding of concentrate, hay and silage was substracted. The total milk productionjha was 17,493 kg 4% FCM. This equals an output of 26,306 Mcal NEL, which was produced with an average stocking rate of 2.69 A.U./ha and a supplemental feeding of 3,150 kg D.M. or 4,642 Mcal NEL. The amount supplemented was equivalent to 17.7% of the total requirement. Thus, the net milk production potentialjha was estimated to be 14,655 kg 4% FCM.

Keywords: milk, permanent pasture, irrigated pastures, nutrient requirements, production potential.
1 Estación Experimental Carillanca (INIA), Casilla 58-D, Temuco, Chile.
2 Estación Experimental Carillanca (INIA), Actualmente: Casilla 971, Temuco, Chile.
3 Estación Experimental Remehue (INIA), Casilla 1110. Osorno, Chile.