نتایج جستجو برای: dairy cow

تعداد نتایج: 54914  

2007
Gabriella A. Varga

The transition period for dairy cows is generally defined as the time period from three weeks prior to parturition through three weeks after parturition. It is now recognized that defining and meeting the nutritional requirements of the transition dairy cow can greatly impact animal health, production in the ensuing lactation, overall longevity, and animal well-being (NRC, 2001). Nutrition and ...

Journal: :iranian journal of applied animal science 2015
m.e. hossain t. chanda g.k. debnath m.m. hassan m.a. haque

the study was carried out on 120 crossbred holstein × shahiwal dairy cows for a period of 150 days to quantify the influence of dietary energy and protein intake on yield and composition of milk. total 12 dairy farms having similar housing systems and holding at least 20 dairy cows in between mid to late lactation were selected for study purposes. the farms were located in the peri-urban and ur...

2017
Pratik Ramesh Wankhade A. Manimaran A. Kumaresan S. Jeyakumar K. P. Ramesha V. Sejian D. Rajendran Minu Rachel Varghese

Smooth transition from pregnancy to lactation is important for high productive and reproductive performance during later postpartum period in dairy animals. On the other hand, the poor transition often leads to huge economic loss to dairy farmers due to compromised production and reproduction. Therefore, understanding the causes and consequence of metabolic changes during the transition period ...

2005
Jonathan Townsend

Forages are the most important ingredient in a dairy cow’s ration. She is a ruminant and to be a healthy, productive cow she needs a healthy, productive rumen. High quality forages are the key to achieving a healthy rumen and a productive cow. However, because of the importance of forages in maintaining rumen health and cow performance, when deficiencies in the amount or quality of the forage i...

Journal: :Journal of animal science 2010
N R Bork J W Schroeder G P Lardy K A Vonnahme M L Bauer D S Buchanan R D Shaver P M Fricke

The objectives were to study the effects of feeding rolled flaxseed (FLX) to early-lactation dairy cows on milk yield, milk components, and milk fatty acid profiles as well as on measures of cow reproduction. Lactating Holstein cows, on 3 commercial dairies, were fed either an early-lactation ration (CON) or a ration that was similar in protein, energy, and fat content but that included FLX (0....

1997
Joe W. West

A well-known dairy scientist once wrote that "compared with an effective environmental management system, manipulation of the cow's diet specifically for heat stress will have a relatively small effect on productivity" (Beede and Shearer, 1992). Indeed many dietary adjustments made during heat stress feeding are to compensate for reduced feed intake or to maintain physiologic homeostasis in the...

Journal: :Animal : an international journal of animal bioscience 2012
M R N Bruijnis B Beerda H Hogeveen E N Stassen

Foot disorders are the main cause of dairy cow lameness and are considered to have a major impact on the welfare of dairy cattle. This study adopts a modeling approach, using a dynamic stochastic model, to provide more insight into the welfare impact of different types of foot disorders, both clinical and subclinical. The impact of specific foot disorders on welfare was assessed by simulating t...

2015
Barbara Häsler Pablo Alarcon Didier Raboisson Agnes Waret-Szkuta Jonathan Rushton

AIMS AND OBJECTIVES The aim of the study was to investigate and compare the financial impact of Schmallenberg disease for different dairy production types in the United Kingdom and France. MATERIALS AND METHODS Integrated production and financial models for dairy cattle were developed and applied to Schmallenberg virus (SBV) disease in a British and French context. The five main production sy...

2008
Jonathan Townsend

Forages are the most important ingredient in a dairy cow’s ration. She is a ruminant and to be a healthy, productive cow she needs a healthy, productive rumen. High quality forages are the key to achieving a healthy rumen and a productive cow. However, because of the importance of forages in maintaining rumen health and cow performance, when deficiencies in the amount or quality of the forage i...

Journal: :Journal of dairy science 2005
L L Tikofsky R N Zadoks

Group G streptococci in animals usually belong to the species Streptococcus canis and are most commonly found in dogs and cats. Occasionally, Strep. canis is detected in milk from dairy cows. An outbreak of Strep. canis mastitis in a dairy herd is described. Based on results from bacterial culture and ribotyping, a cat with chronic sinusitis was the most likely source of the outbreak. Subsequen...

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