Effects of placement month on average daily gain, feed efficiency and death loss of feedlot cattle /
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| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1991.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Abstract: | Data were collected from three feedyards located in the Texas Panhandle. Climate data were collected from the National Weather Station, Amarillo, Texas. Statistical analysis was performed on data to evaluate the effects of sex (SEX), placement month (InMo), weight (InWt), feedyard (FY), placement year (InYr), and interactions of InMo x InWt, SEX x InWt and SEX x InMo x InWt on death loss (DL), feed efficiency (FE) and average daily gain (ADG). The interaction of SEX x InMo x InWt was significant (P < .05) on DL, FE and ADG. Least-squares means for all independent variables were calculated for DL, FE and ADG. Least-squares means for the interaction of SEX x InMo x InWt were used to generate adjustment factors for projected ADG calculated in the breakeven program using the Lofgreen and Garrett (1968) equation. Actual consumptions, as a percent (%) of body weight (BW), were used for each InWt group (400 - 499, 500 - 599, 600 - 600 and 700 - 799) to estimate ADG. The projected ADG was then divided into the ADG mean generated from data analysis to calculate adjustment factors. Steer adjustment factors indicate the Lofgreen and Garrett equation generally overestimated ADG for all weight groups (P < .05). Heifer adjustment factors indicated an underestimation of ADG for heavier (> 700 lbs) heifers and overestimated heifers (< 700 lbs) for ADG. Use of these results will be important to more accurately predict performance of feedlot cattle. |
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| Item Description: | Typescript (photocopy). Vita. "Major subject: Animal Science." |
| Physical Description: | viii, 65 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references. |