Reemplazo de la pasta de soya por el grano de chocho (Lupinus mutabilis) en un alimento balanceado para vacas lecheras

Abstract

This work evaluated the effect of replacing soybean paste with lupin bean (Lupinus mutabilis) in a balanced feed for dairy cows. For this purpose, 12 Holstein Friesian dairy cows housed at the Irquis Farm (University of Cuenca) were randomly divided into two groups according to feed supplementation: group 1, (n = 6) lupine grain and group 2 (n = 6) soybean paste. The experiment consisted of three six-day periods, with three days of adaptation each, giving a total of nine days for each period. Two treatments were applied: T1 (balanced with lupine) and T2 (balanced with soybean), these were administered in an amount of 2.75 kg/day, distributed in the morning and in the afternoon after milking to each animal, group one consumed T1 in the first and third period and T2 in the second period (T1-T2-T1); group two consumed T2 in the first and third period and T1 in the second period (T2-T1-T2). A daily record was kept of the milk production of each cow in the three periods. On the last day of each period, 50 ml of milk samples were taken from each animal to analyze protein, lactose, fat, total solids, non-fat solids, density and pH. The results of milk production, milk quality, fat percentage, total solids, density and pH showed no significant difference (P ˃ 0.05) between both treatments. However, T2 presented significance (P < 0.05) in protein, lactose and non-fat solids. Regarding milk production costs, to produce one kilogram of milk using soybean or lupin requires $ 0.15 and $ 0.19 respectively. In conclusion, lupine can effectively replace soybean paste in dairy cow feed because it can influence milk production at similar levels as soybean.