EVALUATION OF MILK PRODUCTION CAPACITY OF HOLSTEIN FRIESIAN COWS RAISED AT PHU YEN HIGH-TECH DAIRY FARM

Abstract

This study was conducted to evaluate factors affecting milk yield of Holstein Friesian (HF) cattle raised in Phu Yen province, Vietnam. Data was collected from January 2020 to December 2024 through the Waikato software system, including 1,734 first-lactation and 597 second-lactation cows. The Wood method was applied to determine the lactation curve, and ANOVA analysis was used to assess the influence of various factors. The data revealed significant differences in milk yield between the two 305-day lactation, with average values in lactation 1 being 9,400.2 L/cow (n = 1,169) and lactation 2 being 11,500 L/cow (n = 293). The variation coefficients (CV%) of both cycles were relatively stable at 19.41% and 17.62% respectively, indicating uniformity in herd productivity, with a difference between the two cycles of 2,100 L/cow, equivalent to 22.34%. The results of constructing the lactation curve established prediction equations recorded for lactation 1: y = 28.1621 × X 0.3478 × 2.71828 (-x 0.074639) and lactation 2: y = 38.8291 × X 0.369824 × 2.71828 (-x 0.110433). This study evaluated the milk production capacity of first-time Holstein Friesian cows raised in Phu Yen and identify factors affecting milk yield to propose solutions for improving productivity under the current conditions of Phu Yen.