Effects of Two Levels of Nitrate and Energy on Lactating Cows Receiving Urea
- 1 July 1970
- journal article
- Published by Oxford University Press (OUP) in Journal of Animal Science
- Vol. 31 (1) , 142-144
- https://doi.org/10.2527/jas1970.311142x
Abstract
Sudan grass hay containing 0.5 and 5.0% KNO3 was fed in combination with 80 and 110% of Morrison's energy recommendations and with 2% urea to determine production and selected physiological effects on lactating cows. Three treatments of low-high, high-high, and high-low KNO3 with energy were used in a 3 × 3 latin square involving three breeds. Twelve blood components were measured. Blood urea nitrogen data showed a significant (P<.10) treatment effect. High KNO3-high energy treatment resulted in significantly (P<.025) higher milk NPN. Milk production was not significantly affected by treatment. Urinary NO3 was increased with high KNO3. Breed differences were observed for blood hematocrit, hemoglobin, methemoglobin and potassium. Copyright © 1970. American Society of Animal Science . Copyright 1970 by American Society of Animal ScienceKeywords
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