Effects of fluorine on dairy cattle. IV. Milk production

Journal Article · Tue Jan 01 04:00:00 EST 1963 · J. Dairy Sci.; (United States)

DOI:https://doi.org/10.3168/jds.S0022-0302(63)89129-8· OSTI ID:5741890

Stoddard, G E; Bateman, G Q; Harris, L E; Shupe, J L; Greenwood, D A

Thirty-two Holstein females were maintained from three to four months of age until 7.5 yr of age on diets containing four levels of fluorine, two levels of concentrate, and two levels of a calcium-phosphorus mineral. Statistically, only the concentrate level treatment affected milk production and then only in the first lactation. Combined lactation, histological, pathological, and other data, however, indicate a reduced milk production on 109 ppm F treatment in the third and fourth lactation and possibly in the second. The 55 ppm treatment appeared to adversely affect milk production in the fourth lactation. Cows on the higher concentrate treatment tended toward higher milk production that did those on the lower level. Mineral treatment did not affect lactation when missing values were not calculated. Efficiency of lactation was not affected by F intake, although higher concentrate and 1% mineral treatments induced more efficient production than the lower concentrate and 3% mineral treatments. All milk residues of F were within safe levels for consumption, although residues increased with increased dietary F. Based on this study, the tolerance of F for lactation in dairy cows over a 7.5-yr period is less than 55 ppm on a dry hay basis or less than 49 ppm on a total dry diet basis. 24 references, 2 figures, 4 tables.

• Research Organization: Utah State Univ., Logan
• OSTI ID: 5741890
• Journal Information: J. Dairy Sci.; (United States), Journal Name: J. Dairy Sci.; (United States) Vol. 46; ISSN JDSCA
• Country of Publication: United States
• Language: English

Related Subjects

560305* -- Chemicals Metabolism & Toxicology-- Vertebrates-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
BIOLOGICAL EFFECTS
CATTLE
CHRONIC EXPOSURE
COMPARATIVE EVALUATIONS
COWS
DIET
DOMESTIC ANIMALS
DOSE-RESPONSE RELATIONSHIPS
ELEMENTS
FLUORINE
HALOGENS
INGESTION
INHIBITION
INTAKE
LACTATION
MAMMALS
NONMETALS
NUTRITION
RUMINANTS
TOLERANCE
VERTEBRATES