ASAS-NANP SYMPOSIUM: RUMINANT/NONRUMINANT FEED COMPOSITION: Challenges and opportunities associated with creating large feed composition tables

Feed Efficiency Opportunities with 2008 Feed Cost

With the milk to feed ratio at 2.36 in February, 2008, dairy managers must carefully reviewing feed inputs relative to milk yield. A milk to feed ratio under 3 is a signal to reduce feed inputs. Feed efficiency (also referred to as milk performance efficiency and dairy efficiency) can be defined as pounds of 3.5%FCM (fat corrected milk) produced per pound of dry matter (DM) consumed. Monitoring...

ASAS Nonruminant Nutrition: Feed Ingredients and Enzymes

1944 Vasotocin receptor mRNA expression in the brain and pituitary of broiler breeder hens. K. Shaffer*1, J.A. Vizcarra1, C.C. Hsu1, J.Y. Yang1, M.L. Rhoads1, L.E. Cornett2, D. Baeyens3, N. Ali3, and J.D. Kirby1, 1Department of Poultry Science, University of Arkansas, Fayetteville, AR, 2Department of Physiology, University of Arkansas for Medical Sciences, 3Department of Biology, University of ...

BIOFUEL CO-PRODUCTS AS LIVESTOCK FEED Opportunities and challenges

Feed intake of sheep as affected by body weight, breed, sex, and feed composition.

The hypotheses tested were that genetic size-scaling for mature BW (A, kg) would reduce variation in intake between kinds of sheep and that quadratic polynomials on u = BW/A with zero intercept would provide good descriptions of the relationship between scaled intake (SI, g/A(0.73) d) and degree of maturity in BW (u) across feeds of differing quality. Both sexes of Suffolk sheep from 2 experime...

Residual Feed Intake: Animal Performance, Carcass Quality and Body Composition

Feed efficiency has a major influence on the unit cost of beef cattle production. Gibb and McAllister (1999) have reported that a 5% improvement in feed efficiency has an economic impact four times greater than a 5% improvement in average daily gain. In addition, the cost of feed is second only to fixed costs in importance to the profitability of commercial beef operations (Basarab, 1999). The ...