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 Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Smith, N. E. Articles by Franke, A. A. Search for Related Content PubMed Articles by Smith, N. E. Articles by Franke, A. A.

Effects of Feeding Protected Tallow to Dairy Cows in Early Lactation

Departments of Animal and Food Science and Technology, University of California, Davis 95616

ABSTRACT

Mixed diets containing 0 (control), 15 (medium fat), and 30% (high fat) of a protected tallow supplement (60% formylated soybean meal and 40% tallow) were fed to Holstein cows during the first 15 wk of lactation. Calculated energy densities of the diets were 1.85, 1.85, and 2.15 Mcal net energy lactation/kg dry matter. Dry matter intakes were higher on control and medium fat than on the high fat diet, but energy intakes were similar for all three diets. Treatments did not affect milk yield, but both diets containing protected tallow increased yields of fat and fat-corrected milk and energy efficiency, and decreased yields of solids-not-fat. Synthesis of fatty acid in the mammary gland was depressed 40 to 50% by protected tallow feeding. Transfers of dietary fatty acids to milk fat were about 35 and 25% from the medium fat and high fat diets. Concentrations of glucose in plasma were not affected by treatment. Non-esterified fatty acids, triglyceride, and cholesterol were elevated by protected tallow feeding.

This article has been cited by other articles:

				H. M. Hammon, C. C. Metges, P. Junghans, F. Becker, O. Bellmann, F. Schneider, G. Nurnberg, P. Dubreuil, and H. Lapierre Metabolic Changes and Net Portal Flux in Dairy Cows Fed a Ration Containing Rumen-Protected Fat as Compared to a Control Diet J Dairy Sci, January 1, 2008; 91(1): 208 - 217. [Abstract] [Full Text] [PDF]

				A. T. M. van Knegsel, H. van den Brand, J. Dijkstra, W. M. van Straalen, M. J. W. Heetkamp, S. Tamminga, and B. Kemp Dietary Energy Source in Dairy Cows in Early Lactation: Energy Partitioning and Milk Composition J Dairy Sci, March 1, 2007; 90(3): 1467 - 1476. [Abstract] [Full Text] [PDF]

				N. B. Litherland, S. Thire, A. D. Beaulieu, C. K. Reynolds, J. A. Benson, and J. K. Drackley Dry Matter Intake is Decreased More by Abomasal Infusion of Unsaturated Free Fatty Acids than by Unsaturated Triglycerides J Dairy Sci, February 1, 2005; 88(2): 632 - 643. [Abstract] [Full Text] [PDF]