Comportamiento productivo de vacas holstein mestizas suplementadas con concentrado en bases de quínua

Abstract

In the sector of “Corazón de Jesus”; Parish of San Andrés, Pillaro Canton, Tungurahua Province. It was assessed, the effect of replacing conventional protein. (25, 50, 75% unfit for human consumption) compared versus to a control treatment about the production of milkmaid dairy cows Holstein. These treatments have 5 repetitions; under a completely randomized design. Consumption for each treatment was similar, in DM 13,72 kg/day; PB 1474,27 g/day; NEl 21,41 Mcal/day; Calcium 70,76g/day and Phosphorus 33,93g/day. The best final body condition and weight gain per day 3,30±0,01 points and 286,67±65,33g/day respectively it was obtained in the T3.

Concerning to milk production l/cow/day it not recorder differences (p<0,021) being obtained averages of 13,74 l (T0), 13,63 l (T1), 13,30 l (T2); being higher values to 9,48 (T3). The cost of a liter of milk for each treatment was 0,18 (T0), 0,17 (T1, T2) and 0,24 (T3). The cost profit was 1,36 USD to T2 (50% of protein replacement), which means that for every dollar spent was obtained 0,36 cents; or 36% return. The quality of milk, protein and fat; it was registered 3,6 and 3,53% in the T2 (p<0,01), concerning to the lactose, it was registered 4,75% in the T3 (p<0,01). In the analysis of ph and the acidity of the milk, it is appreciated that the two variables was raised significantly (6,32 and 0,2%) respectively, to replace in higher percentage of the conventional protein for the derived protein of the quinua.