Effects of feeding sudangrass on iodine metabolism of lactating dairy cows

Moss, B.R. and Voillequé, P.G. and Moody, E.L. and et al, . (1972) Effects of feeding sudangrass on iodine metabolism of lactating dairy cows. Journal of Dairy Science, 55 (10). pp. 1487-1491.

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Six lactating Holstein cows producing an average of 16kg of milk daily were in a cross-over design of 7-day experimental and adjustment periods. Cows were fed either sudangrass or bromegrass green chop ad libitum as the only forage. Each cow was dosed orally with 120 μCi 125I and 500 μCi 131I at the beginning of the first and second experimental periods, respectively. Cows were in metabolism stalls and blood, feces, urine, and milk samples were collected for 7 days post-dosing. Average 7-day excretions of radioiodine doses by cows on sudangrass and bromegrass treatments were 4.5 and 8.3% (P<.025) in milk, 36.8 and 35.5% (P>.10) in feces, and 39.7 and 34.3% (P>.10) in urine. Plasma radioiodine did not differ (P<.05). Feeding sudangrass reduced the average percentage of the total radioiodine dose secreted (in 7 days) per kilogram of milk from .090 to .048 (P<.01) and the milk:plasma ratios from 2.05 to 1.01 (P<.05)

Item Type: Article
Author Affiliation: Animal and Range Sciences Department, Montana State University, Bozeman 59715
Subjects: Animal Husbandary
Divisions: Other Crops
Depositing User: Ms K Syamalamba
Date Deposited: 24 Aug 2012 04:05
Last Modified: 24 Aug 2012 04:06
Official URL: http://dx.doi.org/10.3168/jds.S0022-0302(72)85699-...
URI: http://eprints.icrisat.ac.in/id/eprint/7498

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