Lipid additives are of particular importance in the diet of high-yielding dairy cows. The aim of this study was to determine the effects of a specially designed energy-protein supplement on dairy cows' performance and milk composition. The experiment was conducted on 24 Polish Holstein-Friesian cows fed total mixed ration. Two kilograms of energy-protein supplement/cow.day were added to the ration for one group of cows whereas the other was fed solely the total mixed ration. The supplement consisted of whole flax seeds, wheat bran, flaxseed and fish oils, and rapeseed cake and its composition is protected by a patent. Feed intake and daily milk yield were recorded automatically for each cow. Gross milk composition and fatty acid profile of milk were determined. An ANOVA was performed to determine the influence of the supplement on performance traits and milk composition. Energy-protein supplement had a positive impact on dry matter intake and milk yield of cows. It had a little effect on the gross milk composition and somatic cell count. The effect of the additive on fatty acids in milk was beneficial, therefore its use in high-yielding dairy cows nutrition is recommended to improve health-promoting properties of milk.

中文翻译：

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勘误：使用能量蛋白补充剂可提高高产奶牛的性能，并改善牛奶的健康特性

脂质添加剂在高产奶牛的饮食中特别重要。这项研究的目的是确定专门设计的能量蛋白补充剂对奶牛的生产性能和乳成分的影响。该实验是在24只混合饲喂日粮的波兰荷斯坦奶牛上进行的。对于一组奶牛，在日粮中添加了两公斤能量蛋白补充品/天，而对另一组母牛则仅饲喂了全部混合日粮。补品由全亚麻籽，麦麸，亚麻籽和鱼油以及菜籽饼组成，其成分受专利保护。自动记录每头母牛的采食量和每日产奶量。测定牛奶的总乳组成和脂肪酸谱。进行方差分析以确定补充剂对生产性能和牛奶成分的影响。能量蛋白补充剂对奶牛的干物质摄入量和产奶量有积极影响。它对牛奶的总成分和体细胞计数影响很小。添加剂对牛奶中脂肪酸的作用是有益的，因此建议将其用于高产奶牛营养中，以改善牛奶的健康特性。