J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Kattnig, R. M.
Right arrow Articles by Bailey, C. C.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Kattnig, R. M.
Right arrow Articles by Bailey, C. C.

Journal of Animal Science, Vol 71, Issue 10 2601-2607, Copyright © 1993 by American Society of Animal Science

JOURNAL ARTICLE

Evaluation of biological efficiency of free-grazing beef cows under semidesert conditions

R. M. Kattnig, J. A. Winder, J. D. Wallace and C. C. Bailey
Department of Animal and Range Sciences, New Mexico State University, Las Cruces 88003.

Effects of cow BW, hip height, and estimated genetic potentials (EBV) for weaning weight direct and milk on cow productivity, fecal OM output, OM intake, and efficiency (kilograms of calf BW/kilogram of OM intake by the cow) were evaluated with 44 free-grazing crossbred cows under semidesert conditions. Calf BW were measured during early, mid-, and late lactation. Data were collected in four periods: Period 1 = late spring (early lactation), Period 2 = late summer (mid-lactation), Period 3 = mid-autumn (late lactation), and Period 4 = mid-winter (nonlactation). Calf BW increased linearly with cow BW (P < .01) in Periods 1, 2, and 3. Fecal OM output and OM intake increased with cow BW in Periods 2 (P < .01) and 4 (P < .01), and on average (P < .02). Overall efficiency decreased with increasing cow BW (P < .04). Taller cows excreted more fecal OM and had greater OM intake throughout the study (P < .02 to P < .11). Overall efficiency decreased with increasing cow hip height (P < .05). Weaning weight direct EBV of cows was related linearly to cow BW (P < .01 to P < .07) and to calf BW (P < .01 to P < .07). Calf weight in all periods increased linearly with milk EBV (P < .001). Overall, fecal OM output, OM intake, and efficiency were not affected by milk EBV.


This article has been cited by other articles:


Home page
 J ANIM SCIHome page
R. C. Waterman, J. E. Sawyer, C. P. Mathis, D. E. Hawkins, G. B. Donart, and M. K. Petersen
Effects of supplements that contain increasing amounts of metabolizable protein with or without Ca-propionate salt on postpartum interval and nutrient partitioning in young beef cows
J Anim Sci, February 1, 2006; 84(2): 433 - 446.
[Abstract] [Full Text] [PDF]

Home page
 J ANIM SCIHome page
B. S. Obeidat, M. G. Thomas, D. M. Hallford, D. H. Keisler, M. K. Petersen, W. D. Bryant, M. D. Garcia, L. Narro, and R. Lopez
Metabolic characteristics of multiparous Angus and Brahman cows grazing in the Chihuahuan Desert
J Anim Sci, September 1, 2002; 80(9): 2223 - 2233.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1993 by the American Society of Animal Science.