نتایج جستجو برای: dairy calf performance

تعداد نتایج: 1103244  

Journal: :Journal of Dairy Science 2021

Individual housing of dairy calves prevails in Europe and North America despite its negative effects on calf development. One the main reasons is that farmers find individual more practical than group housing. A compromise between practice welfare could be pairs. Therefore, we aimed to compare health, feed intake, growth, behavior a novel arena 22 individually (INDI) 44 pair-housed were randoml...

A.A. Gharadaghi A.R. Aghashahi M. Faraji M. Vatankhah,

In this study 495 smallholder dairy farms in 52 villages of different township in southwestern province of Iran (Chaharmohal and Bakhtiari province) included 1321 lactating cows and 2811 total mature cows (lactating and dry) during winter 2009 to summer 2010 were used to estimate economic opportunities insmallholder dairy farms. Questionnaire survey was used to collect data from last year infor...

2013
Aurora Villarroel Taylor B Miller Elisha D Johnson

Evaluation of dairy replacement calf health is generally divided into the pre-weaning and post-weaning periods; with an average weaning age of 8.6 weeks [1]. In 2007, the NAHMS Dairy study found that the pre-weaning period accounts for about 81% of total dairy replacement calf mortality [1]. Accordingly, management strategies to optimize health during this period will have the greatest impact o...

Journal: :Journal of dairy science 2014
D Raboisson E Maigne P Sans G Allaire E Cahuzac

Herd-level risk factors for dairy calf and heifer mortality in France were identified by calculating herd-level variables (including mortality risk or rate) using the National Bovine Identification Database (2005 and 2006). Eleven dairy production areas representing different livestock systems were also included. Statistical analyses were based on a probit model (mortality risk or rate=0 or >0)...

2012
Kerstin de Verdier Ann Nyman Christina Greko Björn Bengtsson

BACKGROUND In Sweden, knowledge about the role of enteropathogenic Escherichia coli in neonatal calf diarrhea and the occurrence of antimicrobial resistance in E. coli from young calves is largely unknown. This has therapeutic concern and such knowledge is also required for prudent use of antimicrobials. METHODS In a case control study Esherichia coli isolated from faecal samples from dairy c...

2005
M. A. Akbar

The present research was designed to evaluate the effects of pre and post-partum energy level and feeding pattern on the performance of crossbred dairy cows and their calves under farm conditions. A total of 16 crossbred dairy cows were divided into two equal groups on the basis of their body weight and milk production. One group was given 30% less and the another was given 30% more energy than...

2015
Daniela Klein-Jöbstl Tim Arnholdt Franz Sturmlechner Michael Iwersen Marc Drillich

BACKGROUND Calf disease may result in great economic losses. To implement prevention strategies it is important to gain information on management and to point out risk factors. The objective of this internet based survey was to describe calf management practices on registered dairy breeding farms in Austria and to estimate differences in calf disease incidences depending on farm structure and m...

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