The effect of different particle sized rations and live yeast supplementation on energy profile in dairy cows in heat stress

Authors : Çağlar OKULMUŞ, Hulusi AKÇAY, Necdet İlker İÇİL, Özhan TÜRKYILMAZ, Bahattin KOÇER

Pages : 30-35

Doi:10.35864/evmd.1257761

View : 37 | Download : 51

Publication Date : 2023-06-20

Article Type : Research Paper

Abstract :The aim of the present study was to determine the effect of adding different sized feed particles and live yeast culture insert ignore into journalissuearticles values(LY); to the rations of dairy cattle on their metabolic energy balance and some blood parameters under heat stress conditions. In this study, four Holstein-Fresiean dairy cattle insert ignore into journalissuearticles values(600 ± 25 kg of BW); in the middle of the lactation, which gave multiple births, were used. The cattle were fed with diets containing 2 different doses of LY additives insert ignore into journalissuearticles values(0 and 1 g/day/dairy cattle); in 2 different particle sizes insert ignore into journalissuearticles values(High particle size insert ignore into journalissuearticles values(HPS); and Short particle size insert ignore into journalissuearticles values(SPS););. The experiment was carried out in 2x2 factorial plane and 4x4 latin square pattern. During the study, it was determined that the averages of the temperature humidity index insert ignore into journalissuearticles values(THI); were above 76. In the present study, the effect of LY supplementation on the live weight insert ignore into journalissuearticles values(BW); change and on feed consumption was not determined. However, it was observed that the non esterified fatty acids insert ignore into journalissuearticles values(NEFA);, beta hydroxybutyric acid insert ignore into journalissuearticles values(BHBA); and glucose levels of dairy cattle decreased significantly, while the urea level increased with the supplementation of LY to the ration insert ignore into journalissuearticles values(P <0.05);. It was determined that the dry matter insert ignore into journalissuearticles values(DM);, organic matter insert ignore into journalissuearticles values(OM); and neutral detergent fiber insert ignore into journalissuearticles values(NDF); consumption of dairy cattle under heat stress increased by decreasing the particle size in the ration, while the consumption of non fiber carbonhydrate insert ignore into journalissuearticles values(NFC); was not affected. In addition, it was observed that NEFA and BHBA in the sera of dairy cattles decreased significantly with the decrease in the particle size in the ration. Considering the data obtained from the present study, it can be said that reducing the particle size and supplementing of LY in the rations of dairy cattle under heat stress ameliorate the metabolic energy balance.
Keywords : Süt sığırı, canlı maya kültürü, enerji dengesi, parçacık boyutu, sıcak stresi