Document Detail

Milk production and nutrient partitioning as measured by (13)C enrichment of milk components during C3 and C4 plant feeding in purebred Holstein and in Charolais × Holstein F2 crossbred cows.
MedLine Citation:
PMID:  25485591     Owner:  NLM     Status:  Publisher    
Dedicated to Professor Dr Hanns-Ludwig Schmidt on the occasion of his 85th birthday Nutrient partitioning was investigated in cows with different genetic merits for milk production by measuring (13)C/(12)C ratios (reported by delta values δ(13)C) in milk components in response to C3 (grass silage) and C4 diets (corn silage). We hypothesised that changes of δ(13)C in milk differ between Holstein (HOL; high milk production) and Charolais × Holstein cows with medium (CHM) and low (CHL) milk production. Changes of δ(13)C (Δδ(13)C) in milk components were estimated by calculating differences of δ(13)C due to switch from C3 to C4 feeding. After switch to C4 feeding, Δδ(13)C of lactose was greater in HOL than in CHL. Immediate Δδ(13)C of milk fat was the lowest in CHL. The maximal Δδ(13)C of casein was the lowest in HOL. The proportion of carbon in milk derived from diet increased with milk yield, indicating the main impact of the milk production level, but minor impact of breed, on nutrient partitioning towards the mammary gland.
Hany Hillal; Jürgen Voigt; Cornelia C Metges; Harald M Hammon
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-12-8
Journal Detail:
Title:  Isotopes in environmental and health studies     Volume:  -     ISSN:  1477-2639     ISO Abbreviation:  Isotopes Environ Health Stud     Publication Date:  2014 Dec 
Date Detail:
Created Date:  2014-12-8     Completed Date:  -     Revised Date:  2014-12-9    
Medline Journal Info:
Nlm Unique ID:  9602611     Medline TA:  Isotopes Environ Health Stud     Country:  -    
Other Details:
Languages:  ENG     Pagination:  1-12     Citation Subset:  -    
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