Effect of feeding cows in early lactation with diets differing in roughage-neutral detergent fiber content on intake behavior, rumination, and milk production
- 1 July 2009
- journal article
- Published by American Dairy Science Association in Journal of Dairy Science
- Vol. 92 (7), 3364-3373
- https://doi.org/10.3168/jds.2009-2078
Abstract
This study measured the effects of including soyhulls as partial roughage replacement in total mixed rations (TMR) fed to 25 pairs of cows during early lactation, on the dry matter (DM) intake, particle kinetics, rumination, in vivo DM and NDF digestibility, milk and FCM yields, and BW changes. The 2 diets used in this study differed in the content of roughage and roughage NDF [23.5 vs. 35.0%, and 12.8 vs. 18.7% in the experimental (EXP) and control (CON) TMR, respectively]. The EXP TMR contained 20.5% less physically effective NDF than the CON TMR (11.7 vs. 14.1% of DM, respectively). These differences were expressed in a greater intake per meal (by 13.3%), a higher rate of meal intake (by 23.2%), a similar number of meals per day, a shorter daily eating duration (by 13%), and a higher total daily DMI (by 7.2%) in the EXP cows as compared with the CON cows. The in vivo DM and NDF digestibility was higher by 4.9 and 22.7%, respectively, in the EXP cows than in the CON cows. The rumination time for the TMR in the EXP cows was 12.7% (54.3 min/d) shorter than in the CON cows, and this was probably related to the difference of 12.4% in physically effective NDF intake between the 2 groups. Patterns of daily rumination and feed consumption throughout an average day showed a delay of approximately 1 to 2 h between the eating and rumination peaks. Particle flow from the rumen of the EXP cows was characterized by a longer rumen mean retention time (by 17.8%) and longer rumination time per kilogram of roughage ingested (by 23.5%) as compared with the CON cows. Thus, favorable conditions for NDF digestion were created in the rumen of the EXP cows, as reflected in their rumen pH values (6.67). The advantage of the EXP cows in intake and digestibility was reflected in a concomitant increase of 7.4% in milk production and of 9.2% in FCM yield as compared with the CON cows. No difference was found between the 2 groups with respect to efficiency of feed utilization for milk production and BW changes.Keywords
Funding Information
- Israeli Milk Council (362-071-06)
This publication has 23 references indexed in Scilit:
- Heat production, eating behavior and milk yield of lactating cows fed two rations differing in roughage content and digestibility under heat load conditionsLivestock Science, 2008
- Heat production and retained energy in lactating cows held under hot summer conditions with evaporative cooling and fed two rations differing in roughage content and in vitro digestibilityAnimal, 2008
- Effects of Varying Dietary Forage Particle Size in Two Concentrate Levels on Chewing Activity, Ruminal Mat Characteristics, and Passage in Dairy CowsJournal of Dairy Science, 2007
- Effects of Alfalfa Particle Size and Specific Gravity on Chewing Activity, Digestibility, and Performance of Holstein Dairy CowsJournal of Dairy Science, 2004
- The Effect of Corn Silage Particle Size on Eating Behavior, Chewing Activities, and Rumen Fermentation in Lactating Dairy CowsJournal of Dairy Science, 2003
- Effects of Propylene Glycol or Fat Drench on Plasma Metabolites, Liver Composition, and Production of Dairy Cows During the Periparturient PeriodJournal of Dairy Science, 2003
- Soybean hulls as a replacement of forage neutral detergent fiber in total mixed rations of lactating cowsAnimal Feed Science and Technology, 2003
- Effects of Particle Size of Alfalfa-Based Dairy Cow Diets on Site and Extent of DigestionJournal of Dairy Science, 2002
- Invited Review: Adhesion Mechanisms of Rumen Cellulolytic BacteriaJournal of Dairy Science, 2001
- A TWO‐STAGE TECHNIQUE FOR THE IN VITRO DIGESTION OF FORAGE CROPSGrass and Forage Science, 1963