Effect of replacing alfalfa silage with high moisture corn on nutrient utilization and milk production

Detalhes bibliográficos
Autor(a) principal: Valadares Filho, S. C.
Data de Publicação: 1999
Outros Autores: Broderick, G. A., Valadares, R.F.D., Clayton, M. K.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: LOCUS Repositório Institucional da UFV
Texto Completo: https://doi.org/10.3168/jds.S0022-0302(99)75525-6
http://www.locus.ufv.br/handle/123456789/19135
Resumo: Twenty-four multiparous lactating Holstein cows were blocked by days in milk and assigned to treatment sequences in a replicated 4x4 Latin square with 21-d periods. The four diets, formulated from alfalfa silage plus a concentrate mix based on ground high moisture ear corn, contained [dry matter (DM) basis]: 1) 20% concentrate, 80% alfalfa silage (24% nonfiber carbohydrates; NFC), 2) 35% concentrate, 65% alfalfa silage (30% NFC), 3) 50% concentrate, 50% alfalfa silage (37% NFC), or 4) 65% concentrate, 35% alfalfa silage (43% NFC). Soybean meal and urea were added to make diets isonitrogenous with equal nonprotein N (43% of total N). Intake of DM and milk yield indicated that adaptation was complete within 7 d of changing the diets within the Latin square. There were linear increases in apparent digestibility of DM and organic matter, and a linear decrease in neutral detergent fiber (NDF) digestibility with increasing dietary NFC. Solutions of significant quadratic equations yielded estimated maxima for intake of DM, organic matter, digestible organic matter, and NDF at, respectively, 37, 38, 43, and 27% dietary NFC. There were linear increases in yields of milk, protein, lactose, and solids not fat with increasing dietary NFC. Feed efficiency (milk/DM intake) yielded a quadratic response with a minimum at 27% dietary NFC. Maxima for milk fat content, fat yield, and fat-corrected milk yield were estimated to occur at, respectively, 30, 34 and 38% dietary NFC. In this short-term trial, maximal DM intake and fat-corrected milk yield indicated that the optimum concentrate for cows fed high moisture ear corn plus alfalfa silage as the only forage was equivalent to 37 to 38% dietary NFC; however, yields of milk, protein and solids not fat were still increasing at 65% dietary concentrate (43% NFC).
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spelling Valadares Filho, S. C.Broderick, G. A.Valadares, R.F.D.Clayton, M. K.2018-04-25T17:25:13Z2018-04-25T17:25:13Z1999-08-090022-0302https://doi.org/10.3168/jds.S0022-0302(99)75525-6http://www.locus.ufv.br/handle/123456789/19135Twenty-four multiparous lactating Holstein cows were blocked by days in milk and assigned to treatment sequences in a replicated 4x4 Latin square with 21-d periods. The four diets, formulated from alfalfa silage plus a concentrate mix based on ground high moisture ear corn, contained [dry matter (DM) basis]: 1) 20% concentrate, 80% alfalfa silage (24% nonfiber carbohydrates; NFC), 2) 35% concentrate, 65% alfalfa silage (30% NFC), 3) 50% concentrate, 50% alfalfa silage (37% NFC), or 4) 65% concentrate, 35% alfalfa silage (43% NFC). Soybean meal and urea were added to make diets isonitrogenous with equal nonprotein N (43% of total N). Intake of DM and milk yield indicated that adaptation was complete within 7 d of changing the diets within the Latin square. There were linear increases in apparent digestibility of DM and organic matter, and a linear decrease in neutral detergent fiber (NDF) digestibility with increasing dietary NFC. Solutions of significant quadratic equations yielded estimated maxima for intake of DM, organic matter, digestible organic matter, and NDF at, respectively, 37, 38, 43, and 27% dietary NFC. There were linear increases in yields of milk, protein, lactose, and solids not fat with increasing dietary NFC. Feed efficiency (milk/DM intake) yielded a quadratic response with a minimum at 27% dietary NFC. Maxima for milk fat content, fat yield, and fat-corrected milk yield were estimated to occur at, respectively, 30, 34 and 38% dietary NFC. In this short-term trial, maximal DM intake and fat-corrected milk yield indicated that the optimum concentrate for cows fed high moisture ear corn plus alfalfa silage as the only forage was equivalent to 37 to 38% dietary NFC; however, yields of milk, protein and solids not fat were still increasing at 65% dietary concentrate (43% NFC).engJournal of Dairy ScienceVolume 82, Issue 12, Pages 2686-2696, December 1999American Dairy Science Association. 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dc.title.en.fl_str_mv Effect of replacing alfalfa silage with high moisture corn on nutrient utilization and milk production
title Effect of replacing alfalfa silage with high moisture corn on nutrient utilization and milk production
spellingShingle Effect of replacing alfalfa silage with high moisture corn on nutrient utilization and milk production
Valadares Filho, S. C.
Alfalfa silage
Nonfiber carbohydrate
High moisture corn
title_short Effect of replacing alfalfa silage with high moisture corn on nutrient utilization and milk production
title_full Effect of replacing alfalfa silage with high moisture corn on nutrient utilization and milk production
title_fullStr Effect of replacing alfalfa silage with high moisture corn on nutrient utilization and milk production
title_full_unstemmed Effect of replacing alfalfa silage with high moisture corn on nutrient utilization and milk production
title_sort Effect of replacing alfalfa silage with high moisture corn on nutrient utilization and milk production
author Valadares Filho, S. C.
author_facet Valadares Filho, S. C.
Broderick, G. A.
Valadares, R.F.D.
Clayton, M. K.
author_role author
author2 Broderick, G. A.
Valadares, R.F.D.
Clayton, M. K.
author2_role author
author
author
dc.contributor.author.fl_str_mv Valadares Filho, S. C.
Broderick, G. A.
Valadares, R.F.D.
Clayton, M. K.
dc.subject.pt-BR.fl_str_mv Alfalfa silage
Nonfiber carbohydrate
High moisture corn
topic Alfalfa silage
Nonfiber carbohydrate
High moisture corn
description Twenty-four multiparous lactating Holstein cows were blocked by days in milk and assigned to treatment sequences in a replicated 4x4 Latin square with 21-d periods. The four diets, formulated from alfalfa silage plus a concentrate mix based on ground high moisture ear corn, contained [dry matter (DM) basis]: 1) 20% concentrate, 80% alfalfa silage (24% nonfiber carbohydrates; NFC), 2) 35% concentrate, 65% alfalfa silage (30% NFC), 3) 50% concentrate, 50% alfalfa silage (37% NFC), or 4) 65% concentrate, 35% alfalfa silage (43% NFC). Soybean meal and urea were added to make diets isonitrogenous with equal nonprotein N (43% of total N). Intake of DM and milk yield indicated that adaptation was complete within 7 d of changing the diets within the Latin square. There were linear increases in apparent digestibility of DM and organic matter, and a linear decrease in neutral detergent fiber (NDF) digestibility with increasing dietary NFC. Solutions of significant quadratic equations yielded estimated maxima for intake of DM, organic matter, digestible organic matter, and NDF at, respectively, 37, 38, 43, and 27% dietary NFC. There were linear increases in yields of milk, protein, lactose, and solids not fat with increasing dietary NFC. Feed efficiency (milk/DM intake) yielded a quadratic response with a minimum at 27% dietary NFC. Maxima for milk fat content, fat yield, and fat-corrected milk yield were estimated to occur at, respectively, 30, 34 and 38% dietary NFC. In this short-term trial, maximal DM intake and fat-corrected milk yield indicated that the optimum concentrate for cows fed high moisture ear corn plus alfalfa silage as the only forage was equivalent to 37 to 38% dietary NFC; however, yields of milk, protein and solids not fat were still increasing at 65% dietary concentrate (43% NFC).
publishDate 1999
dc.date.issued.fl_str_mv 1999-08-09
dc.date.accessioned.fl_str_mv 2018-04-25T17:25:13Z
dc.date.available.fl_str_mv 2018-04-25T17:25:13Z
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dc.identifier.uri.fl_str_mv https://doi.org/10.3168/jds.S0022-0302(99)75525-6
http://www.locus.ufv.br/handle/123456789/19135
dc.identifier.issn.none.fl_str_mv 0022-0302
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url https://doi.org/10.3168/jds.S0022-0302(99)75525-6
http://www.locus.ufv.br/handle/123456789/19135
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartofseries.pt-BR.fl_str_mv Volume 82, Issue 12, Pages 2686-2696, December 1999
dc.rights.driver.fl_str_mv American Dairy Science Association. Published by Elsevier Inc.
info:eu-repo/semantics/openAccess
rights_invalid_str_mv American Dairy Science Association. Published by Elsevier Inc.
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