Prevention of Heat Stress in Lactating Cows

Abstract

In summer, when the air temperature rises, dairy cattle are very susceptible to heat stress, which results in a significant decline in productivity. The goal of the study is to assess how a Coniferous Energy Supplement (CES) made from raw materials derived from forestry waste affects lactating cows' ruminal digestion, milk production, and quality in extreme temperatures. Two sets of black-and-white cows were studied for a preliminary period after calving. The cows of the control group received the main diet, which consisted of hay, green mass, and grain mixtures. In addition to the main food, the coniferous energy supplement was introduced into the diets of dairy animals of the experimental group at a dose of 150 g/head per day. During the study period, the given feed's chemical composition, ruminal digestion parameters, productivity, and quality of cows' milk were determined. By incorporating the coniferous energy supplement into the cows' diet during the hot season, the rumen's enzymatic processes were strengthened, the blood serum's bactericidal activity and lysis percentage increased and the average daily milk yields of natural fat content increased by 11.9-12.2%.