نتایج جستجو برای: dairy calf

تعداد نتایج: 58158  

Journal: :Agricultural Systems 2021

Livestock production, and more particularly ruminants, is criticized for its low conversion efficiency of natural resources into edible food. The objectives this paper are to propose an evaluation the contribution food security different European cattle farms through three criteria: 1) production assessed by amount human-edible protein (HEP) energy (HEE) produced at farm level, 2) feed-food com...

Journal: :Acta Veterinaria Scandinavica 1993

Journal: :Journal of the Japan Veterinary Medical Association 1991

2015
Robert Wolf Karin Orsel Jeroen De Buck Herman Wildrik Barkema

Mycobacterium avium subspecies paratuberculosis (MAP) causes Johne's disease, a chronic progressive enteritis. It is generally assumed that calves rarely shed MAP bacteria and that calf-to-calf transmission is of minor importance. The objectives were 1) to estimate the prevalence of MAP-shedding young stock in MAP-infected dairy herds, and identify predictors for test-positive young stock; and ...

A.R. Bayat M.A. Ebrahimi S. Sobhanirad,

The aim of this study was to compare the effects of dietary supplementation of ajwain (Trachyspermum ammi) and thyme (Thymus vulgaris) essential oils(EO)on nutrients digestibility, blood parameters and growth performanceof neonatal dairy calves during eight weeks. Sixty suckling dairy calves with an initial body weight (43.2±3.8 kg) were randomly allocated to five treatments including CO, contr...

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