Evaluación bovinométrica y productiva del rejo en el programa bovinos de leche Tunshi

Abstract

At the Tunshi Experimental Station of the ESPOCH, was evaluated the bovinometry of 24 cows in the first stage of lactation; Taking the zoomometric measurements: Haunch height, height of the cross, height of the posterior udder, hip width, rump width, udder height, udder width, posterior udder width, pelvis width, chest width, angle of the croup, angle of legs lateral view, angle of nipple, hooves angle, angle of previous insertion of the udder, perimeter of the nipple, perimeter of cane, thoracic perimeter, perimeter of the knee, length of the cane, length of nipple; Daily milk production, age, body condition, number of births, and economic. These variables were analyzed with descriptive statistics; Regression and correlation using Microsoft Excel software (2013). Determining that the production of milk depends on the posterior width of the udder in 30.40%; and, the 18.12% of milk production depends significantly on udder width with P > 0.001, corresponding to a linear regression in both cases. The zoometric measures most associated with dairy production are: Pelvis width 38.76 + 0.66 cm, rump angle 42.65 + 0.72o, side view leg angle is 115.96 + 1.19 o; previous insertion of the udder of 118.83 + 3.71 o; Thoracic perimeter 191.63 + 1.5 cm; nipple length 5.91 + 0.29 cm; middle suspensory ligament of 33.15 + 1.01 cm. The daily production of milk is (18.68 l), liters, and the accumulated production in the first phase of lactation is (1307.36 l) liters per cow. It is advisable to select morphologically harmonic animals which guarantee a milk production and that allow an economic profitability