Understanding Dry Matter Consumption by Dairy Cows

http://edis.ifas.ufl.edu/ ( Publisher's URL )
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Material Information

Title:
Understanding Dry Matter Consumption by Dairy Cows
Physical Description:
Fact sheet
Creator:
Harris, Barney Jr.
Publisher:
University of Florida Cooperative Extension Service, Institute of Food and Agriculture Sciences, EDIS
Place of Publication:
Gainesville, Fla.
Publication Date:

Notes

Acquisition:
Collected for University of Florida's Institutional Repository by the UFIR Self-Submittal tool. Submitted by Melanie Mercer.
Publication Status:
Published
General Note:
"Original publication date September 1992. Reviewed June 2003."
General Note:
"DS 43"

Record Information

Source Institution:
University of Florida Institutional Repository
Holding Location:
University of Florida
Rights Management:
All rights reserved by the submitter.
System ID:
IR00004722:00001


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DS 43 Understanding Dry Matter Consumption by Dairy Cows1 Barney Harris, Jr.2 1. This document is DS 43, one of a series of the Animal Science Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date September 1992. Reviewed June 2003. Visit the EDIS Web Site at http://edis.ifas.ufl.edu. 2. Professor, Dairy Science Department, Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville. The Institute of Food and Agricultural Sciences (IFAS) is an Equal Employment Opportunity Affirmative Action Employer authorized to provide research, educational information and other services only to individuals and institutions that function without regard to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For information on obtaining other extension publications, contact your county Cooperative Extension Service office. Florida Cooperative Extension Service / Institute of Food and Agricultural Sciences / University of Florida / Larry R. Arrington, Interim Dean Many factors influence the dry matter (DM) intake of high producers. Those commonly observed are body weight, health of cows, level of milk production, climate, frequency of feeding, ration balance and palatability of the ration. The dry matter intake for high producers varies according to type of ration and can range from 2.5 to 5 lb of dry matter per 100 pounds body weight. Forages vary considerably in protein and energy. Where stored forages are used in abundance, a forage test should be conducted periodically. Table 1 contains information on DM intake for cows on various rations. Table 2 contains information on DM intake for cows of various sizes producing different levels of milk.

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Understanding Dry Matter Consumption by Dairy Cows 2 Table 1. Dry matter intake on various rations in Florida. Treatment DM intake (% body wt) Milk (lb) Milk fat (%) Daily wt. gain (lb) Ensiled complete ration 3.1 41.1 4.8 0.99 Ration blended at feeding 3.2 41.6 4.8 0.79 Silage and concentrate fed separately 3.1 42.5 5.0 1.30 Complete (bagasse) feed 3.9 47.8 4.1 1.10 Complete (CS hulls) feed 4.1 50.2 3.8 0.75 Table 2. Estimated DM intake at various levels of production and body weight (4% FCM). FCM Body weight of cows (lb) (lb/day) 900 1100 1300 1400 20 2.6 2.3 2.1 2.1 40 3.4 3.1 2.8 2.7 60 4.1 3.7 3.4 3.2 70 4.6 4.0 3.6 3.5 80 5.1 4.3 3.8 3.7 90 5.5 4.7 4.1 3.9 100 -5.0 4.4 4.2 *NRC 1988; FCM = fat correct milk