Effect of diet energy content and level of restriction on performance, nutrient digestibility, and puberty in replacement beef heifers

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dc.contributor.author Brandt, Robert T., Jr.
dc.contributor.author Pope, Ronald V.
dc.contributor.author Stevenson, Jeffrey S.
dc.date.accessioned 2010-10-05T19:16:40Z
dc.date.available 2010-10-05T19:16:40Z
dc.date.issued 2010-10-05T19:16:40Z
dc.identifier.uri http://hdl.handle.net/2097/6287
dc.description.abstract Eighty Angus × Hereford crossbred weanling heifers (548 lb) were used in a 2×2 factorial experiment to evaluate dietary energy concentration (NEg .51 vs .61 Mcal/lb) and intake restriction (to produce 1.25 and 2.0 lb/d gain). Intake of the diets (corn - corn silage based; 14% CP) was adjusted every 2 weeks. Steer counterparts to the heifers were used in a 2×3 factorially arranged digestion experiment using the same treatments with an additional ad libitum intake level. There were no interactions between energy content and level of restriction. Heifers fed the higher energy diet maintained equal daily gain on 9.7% less (P<.004) feed, the probable result of higher (P<.0001) OM digestibility. Feed efficiency was improved 6.3% (P=.14) for heifers fed the higher energy diet. NRC (1984) energy equations underpredicted rate of gain of 1.25 and 2.0 lb/d by 24.6 and 7.7%, respectively, probably as a result of enhanced (P<.05) nutrient digestibility at the more restricted intake. Puberty (based on serum progesterone) was not influenced by treatment. Limit-feeding grain to produce replacement heifers appears practical when harvested forages are scarce and(or) high-priced. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Cattlemen’s Day, 1993 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 93-318-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 678 en_US
dc.subject Beef en_US
dc.subject Beef heifers en_US
dc.subject Feed restriction en_US
dc.subject Nutrient digestibility en_US
dc.subject Performance en_US
dc.title Effect of diet energy content and level of restriction on performance, nutrient digestibility, and puberty in replacement beef heifers en_US
dc.type Conference paper en_US
dc.date.published 1993 en_US
dc.citation.epage 108 en_US
dc.citation.spage 107 en_US
dc.description.conference Cattlemen's Day, 1993, Kansas State University, Manhattan, KS, March 5, 1993 en_US
dc.contributor.authoreid rvpope en_US
dc.contributor.authoreid jstevens en_US

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