Blood amino acids profile responding to heat stress in dairy cows
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چکیده
منابع مشابه
Blood amino acids profile responding to heat stress in dairy cows
OBJECTIVE The objective of this experiment was to investigate the effects of heat stress on milk protein and blood amino acid profile in dairy cows. METHODS Twelve dairy cows with the similar parity, days in milk and milk yield were randomly divided into two groups with six cows raised in summer and others in autumn, respectively. Constant managerial conditions and diets were maintained durin...
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Efficient reproductive performance of lactating dairy cattle in tropical/subtropical and arid environments throughout the world is impacted by a multiplicity of factors such as: the physical environment, socialeconomic status of producers, available nutrients, adaptability and genetic composition of cattle, intensive or extensive management systems, and available reproductive technology. Season...
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One of the great challenges that the dairy industry faces, especially during the summer month, is heat stress. Increase in temperature, together with an increase in humidity, results in a decrease in milk production, feed intake, feed efficiency and even reduced growth rate in heifers (West, 1999). Reproduction and health are also negatively affected by heat stress (St Pierre et al., 2003). Dif...
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Four Holstein-Friesian cows were used to investigate the effects of intravascular infusions of AA mixtures on milk constituents. Cows were in wk 11 to 28 of lactation and were fed a basal concentrate (142 g of CP/kg of DM) and grass silage (149 g of CP/kg of DM) in a 60:40 ratio (percentage of DM). Cows were fed hourly, and feed intake was fixed at 95% of ad libitum intake for each experimental...
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ژورنال
عنوان ژورنال: Asian-Australasian Journal of Animal Sciences
سال: 2018
ISSN: 1011-2367,1976-5517
DOI: 10.5713/ajas.16.0428