Effects of Dietary Engergy Density on Metabolic Status and Lactation Performance of Periparturient Dairy Cows PDF Download
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Author: Euler Rabelo
Publisher:
ISBN:
Category :
Languages : en
Pages : 192
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Author: Euler Rabelo
Publisher:
ISBN:
Category :
Languages : en
Pages : 192
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Author: Galal Moustafa Yousif
Publisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 214
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Author: Pierre Cronjé
Publisher: CABI
ISBN: 9780851997124
Category : Electronic books
Languages : en
Pages : 492
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Book Description
The International Symposium on Ruminant Physiology (ISRP) is the premier forum for presentation and discussion of advances in knowledge of the physiology of ruminant animals. This book brings together edited versions of the keynote review papers presented at the symposium.
Author: Douglas John Minor
Publisher:
ISBN:
Category :
Languages : en
Pages : 172
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Author: Sarah Elizabeth LaCount
Publisher:
ISBN:
Category :
Languages : en
Pages : 282
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The transition from pregnancy to lactation is a time of great metabolic adaptations for the dairy cow. Dry matter intake decreases, yet demand for nutrients increase vastly with the onset of milk production resulting in negative energy balance. Cows must mobilize body tissues to increase energy for the body while sparing glucose for the mammary gland. Due to this increased metabolic demand and negative energy balance, cows often end up in a state of metabolic dysfunction which can have disastrous consequences. Nutritional strategies can help increase glucose precursors while decreasing body tissue mobilization that is linked to increased risk of disease. Previous research is mixed on the impacts of high starch to increase glucose precursors to the cow immediately postpartum, likely due to an increased risk for subacute ruminal acidosis that can result in metabolic dysfunction and inflammation. Feeding strategies which utilize high starch while also including higher fiber to promote rumen health have not been conducted. The objectives of this dissertation were to: 1) investigate interplay of fiber fractions in high starch postpartum dairy cow diets on performance, hepatic metabolism and energy balance, 2) examine interplay of inflammation, hepatic metabolism, energy metabolites, and metabolic hormones in the postpartum period, and 3) investigate opportunities to combine use of a higher digestibility corn silage with monensin to optimize production and health in the periparturient period. Increased fiber in the postpartum diet can limit intake in early lactation, resulting in negatively altered metabolism and production. As intake restrictions were eased by feeding a more fermentable diet, cows were able to recover intake, production, and energy metabolites in a matter of days to match cows that were not limited in intake early postpartum. Increased fiber in diets that may pose a higher risk of subacute ruminal acidosis may still be warranted, though further research on fiber levels and fractions is needed. Correlations between improved hepatic metabolism and metabolic hormones indicative of energy balance were positive, though correlations between markers of improved hepatic metabolism and inflammation were negative. Cows fed corn silage with higher digestibility and monensin, which increases glucose precursors, showed a possible synergistic effect on milk production. Using either strategy alone increased energy status, improved metabolism and health status, however a combination of both strategies decreased milk components, indicating they might negatively alter the rumen environment and milk fat synthesis.
Author: M.W. Verstegen
Publisher: Springer Science & Business Media
ISBN: 9400933630
Category : Science
Languages : en
Pages : 511
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Book Description
Animal production systems have changed dramatically over the last two decades. Knowledge of energy metabolism and environmental physio logy has increased as appears from many textbooks on these disciplines. The contents of the symposia on energy metabolism of farm animals show this and they have initially focussed on feed evaluation and later on com parative aspects of energy metabolism. They show part of the progress being made. Application of knowledge of energy metabolism for animals has a long history since Lavoisier. In addition to this, studies about the environ mental requirements of animals have shown that we are still far from ac curate assessment of these requirements in terms of nutrients and ener gy. I n model studies on energy metabolism researchers have recognized the interaction between the environment and the energy requirements of animals. Estimation of energy requirements has been done in physiolo gical, physical and behavioural studies. The impact of conditions as en countered by animals in various production systems has been approached from different viewpoints related to these different disciplines. In addi tion, various kinds of infections (bacterial, parasitic: subclinical, clini cal) have been evaluated only recently with regard to their effect on pro tein and/or energy metabolism and thus on production. People working in the field of feed evaluation have defined how che mical and physical properties of nutrition infiuence energy to be derived for maintenance and production.
Author: Winfield Scott Burhans
Publisher:
ISBN:
Category :
Languages : en
Pages : 706
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Author: Agricultural Research Council (Great Britain)
Publisher: Cabi
ISBN:
Category : Nature
Languages : en
Pages : 376
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This work discusses the nutrient requirements of all forms of ruminant livestock.
Author: Rolf Schmitz
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Jonas de Souza
Publisher:
ISBN: 9780355891508
Category : Electronic dissertations
Languages : en
Pages : 219
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