| Autor: |
Brandt, R. T., Kuhl, G. L., Campbell, R. E., Kastner, C. L., Stroda, S. L. |
| Zdroj: |
Journal of Animal Science; February 1992, Vol. 70 Issue: 2 p343-348, 6p |
| Abstrakt: |
One hundred forty British × Exotic crossbred, yearling steers (370 kg) were used in a 2 × 2 factorial experiment to evaluate main effects and the interaction of grain type (steam-flaked sorghum grain [SFSG] or steam-flaked corn [SFC]) and level of supplemental fat (0 or 4% yellow grease [YG]) on feedlot performance, diet NE concentration, carcass traits, and chemical composition and sensory properties of longissimus muscle. Steer performance and estimated dietary NEmand NEgvalues were not different between SFSG and SFC. Supplemental YG improved (P< .05) gain/feed and estimated NEmand NEgof both SFSG and SFC diets. Compared with steers fed SFSG, steers fed SFC had a more yellow (P< .05) subcutaneous fat color. Supplemental YG had an additive effect (P< .025) on yellow color of subcutaneous fat but improved (P< .08) the lean color of longissimus muscle. Grain type or supplemental YG had no effect on sensory properties or mechanical shear of longissimus muscle. Longissimus muscle cholesterol content was elevated (P< .05) by supplemental YG (.49 vs .52 mg/g of wet tissue for 0 vs 4% YG, respectively); however, the biological significance of this result is questionable. Similarly, effects of YG on increased (P< .05) stearic acid concentration and a higher concentration (P< .05) of linoleic acid measured in longissimus muscle of steers fed SFSG vs SFC were small in magnitude. These data indicate that under the conditions of this experiment, NE contents of SFSG and SFC were similar.(ABSTRACT TRUNCATED AT 250 WORDS) |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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