Transition cow nutrition and management

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Show simple item record Shirley, John E. 2010-12-10T17:34:19Z 2010-12-10T17:34:19Z 2010-12-10
dc.description.abstract Dairy cows are generally provided with a 60-day dry period. The first part of the dry period is called the “far-off dry period” beginning at dry off and continuing until 21 days before projected calving date. The second part of the dry period is called the “close-up dry period” beginning at 21 days before projected calving date and ending at parturition. Diets formulated for far-off dry cows are generally high in forage and are designed to support body maintenance and fetal growth. Rumen function and microbial populations adjust to these diets by the end of the far-off period and require a period of adaptation before switching to a high-energy lactation diet. Thus, a close-up diet should not be formulated as an entity unto itself, but as a bridge between a low and high-energy diet, retaining some characteristics of both the far-off and lactation diets. The ultimate success of a transition cow nutrition and management program is a lactation characterized by high milk and yields of its component and an absence of ruminal, metabolic, mammary gland, and reproductive disorders. Therefore, close-up diets should encourage ruminal adaptation to subsequent lactation diets, prevent metabolic disorders, and minimize tissue mobilization prior to parturition. Rumen bacteria, protozoa, and fungi are sensitive to new diet ingredients and the amount of substrate available (dry matter intake). Thus, adequate time should be allocated to exposure to the close-up diet before parturition. Our studies indicate that cows should be offered a close-up diet that contains 13.5 to 14.5% crude protein and 35% nonfiber carbohydrate for approximately 28 days before parturition. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Diary Day, 2003 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 04-129-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 919 en_US
dc.subject Dairy en_US
dc.subject Close-up diets en_US
dc.subject Transition cows en_US
dc.title Transition cow nutrition and management en_US
dc.type Conference paper en_US 2003 en_US
dc.citation.epage 40 en_US
dc.citation.spage 36 en_US
dc.description.conference Dairy Day, 2003, Kansas State University, Manhattan, KS, 2003
dc.contributor.authoreid jshirley en_US

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