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Role of nutrition in ethiopathogenesis of health disturbances of dairy cows in periparturient period

机译:营养在围产期乳牛健康疾病的致病性机制中的作用

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The goals of high producing dairy cow nutrition are to provide good health and condition of animals, normal 300-day long lactation, more lactation cycle during exploitation, maximal amount of milk yield with optimal chemical contents, as well as bringing healthy and vital veal once a year. Nutrients metabolism disturbances in dairy cows mostly expressed in periparturient period due to higher demands needed for fetus growth and development, as well as for requirements for lactation. Energy metabolism disorder in dairy cows mostly appeared as kethosis complicated with liver fatty acid accumulation that firstly caused fatty infiltration and later fatty degeneration of hepatocytes. Besides energy, in this period changes of mineral status are very common as consequences of higher mineral deposition in skeleton of fetus, and secretion via milk by beginning of the lactation. Mineral metabolism disorder in dairy cows, firstly calcium, mostly appeared as paresis and paralysis. Dairy cows peripartal metabolic disturbances are very dependent and caused among themselves commonly leading to mutual appearance. That’s why the meal for high producing dairy cow in periparturient period have to be optimal balanced not only according to amount of some nutrients, but their relationship, as well as their influences on metabolic pathways and homeostasis.
机译:高产奶牛营养的目标是提供良好的健康状况和动物状况,正常泌乳300天,在开采过程中增加泌乳周期,以最佳的化学成分最大限度地增加产奶量,并一次带来健康和重要的小牛肉一年。乳牛的营养代谢紊乱主要表现在围产期,这是由于胎儿生长发育和泌乳需求增加所致。奶牛的能量代谢紊乱主要表现为关节病并发肝脂肪酸积累,首先引起脂肪浸润,随后引起肝细胞脂肪变性。除了能量外,在此期间,矿物质状态的变化非常普遍,其原因是矿物质在胎儿骨骼中沉积的增加,以及开始泌乳后通过乳汁分泌的结果。奶牛的矿物质代谢紊乱,首先是钙,主要表现为轻瘫和瘫痪。奶牛的围产期代谢紊乱非常依赖,并且在它们之间通常共同导致相互出现。因此,不仅要根据一些营养素的含量,还要根据它们之间的关系以及它们对代谢途径和体内稳态的影响,对高产奶牛的进餐进行最佳平衡。

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