FORMATION OF MILK PRODUCTIVITY OF HOLSTEIN COWS WHEN USING KAUFIT AKTIV PRO 80 FEED ADDITIVE IN THEIR DIETS

DOI 10.31588/2413_4201_1883_3_267_103 УДК 636.234.1.034.087.74

Abstract

The use of high-protein additives in the diets of high-yielding cows is a topic of current interest from both scientific and practical perspectives. The aim of the study was to improve the feeding system for high-yielding lactating Holstein cows and to assess its impact on milk productivity parameters and milk quality indicators. The research was conducted at “Pravda” Agricultural Enterprise (LLC SP Pravda) in Ordinskiy district of Perm Krai. The experimental period lasted throughout the entire first lactation. First-calf cows were divided into two groups of 50 animals each after calving: Group 1 (control) – first-calf cows received, in addition to the basal diet, concentrated feeds as well as 1 kg each of sunflower and rapeseed oilcake during the recording period; Group 2 (experimental) received concentrated feeds and Kaufit Aktiv Pro 80 protein-vitamin-mineral concentrate in addition to the basal diet (sunflower and rapeseed expeller cakes were replaced by Kaufit Aktiv Pro 80 at a 50% level based on energy value and crude protein content). The application of protein-mineral-vitamin complex Kaufit Aktiv Pro 80 significantly increased the milk productivity of the experimental first-calf heifers across several metrics: average daily milk yield by 1.4 kg (5.4%), first-lactation milk yield by 422.5 kg (5.3%), fat and protein content by 0.37% and 0.13% respectively and the production index by 1095.4 kg (13.2%). It also improved milk quality: total solids increased by 0.46%, fat content by 0.33%, protein content by 0.13%, lactose content by 0.2%, and solids-not-fat content by 0.13%. Thus, optimizing cattle feeding systems through the inclusion of high-protein feed additives represents a key strategy for effectively increasing dairy herd productivity.