HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Dennis, R. J. Articles by Jacobson, D. R. Search for Related Content PubMed PubMed Citation Articles by Dennis, R. J. Articles by Jacobson, D. R.

Effect of Dietary Potassium Percent for Lactating Dairy Cows^{1 ,2,}

Department of Animal Sciences, University of Kentucky, Lexington 40506

ABSTRACT

Three groups of Holstein cows (four cows per group) past the peak of lactation were fed dietary potassium as percent of dry matter as follows: .45% for 20 days to all groups; .45, .55, and .66% to the respective groups for 12 wk; and .66% to all groups for 19 days. Dietary potassium had no significant effect on milk fat and solids-not-fat contents of milk, milk production, or milk and blood serum cations (potassium, sodium, magnesium, calcium). However, body weights were affected. Symptoms common in potassium deficiency were not apparent. Average daily milk production, feed intake, and body weight gains for the 12 wk in kilograms were: 21.9, 15.8, and 15.7; 23.4, 16.4, and 54.5; and 22.8, 19.9, and 92.9 for the .45, .55, and .66% rations. When .66% potassium was fed to groups previously fed .45 and .55% potassium, feed intake increased by 3.6 kg and 1.3 kg but increased only .2 kg in the group previously fed .66%.

¹ The investigation (75-4-1) is in connection with a project of the Kentucky Agricultural Experiment Station and is published with approval of the Director.

² Data are from the Masters Thesis submitted by R. J. Dennis to the Graduate School of the University of Kentucky in partial fulfillment of the requirements for the Master of Science degree.

³ Route 3, Huffman Mill Road, Lexington, KY 40505.