Effects of silage crop and dietary crude protein levels on digestibility, ruminal fermentation, nitrogen use efficiency, and performance of finishing beef cattle

Detalhes bibliográficos
Autor(a) principal: Silva, L.D. da
Data de Publicação: 2016
Outros Autores: Pereira, O.G., Silva, T.C. da, Valadares Filho, S.C., Ribeiro, K.G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: LOCUS Repositório Institucional da UFV
Texto Completo: https://doi.org/10.1016/j.anifeedsci.2016.07.008
http://www.locus.ufv.br/handle/123456789/21442
Resumo: Two trials were conducted to evaluate the effects of silage crop and levels of dietary crude protein (CP) in Nellore beef cattle. The experimental diets consisted of Stylosanthes (StS) or corn silage (CS) with two levels of dietary CP, 110 and 130 g CP/kg diet on a dry matter (DM) basis. The forage to concentrate ratio was 50:50 on a DM basis. In Experiment 1, the four bulls that were used had an average initial body weight (BW) of 450 ± 37.9 kg, and were surgically cannulated in the rumen and abomasum. The bulls were assigned to a 4 × 4 Latin square with a 2 × 2 factorial design of treatments, and four 16-d periods. During this experiment, we collected ruminal fluid, abomasal digesta, feces, urine, and blood. In addition, the kinetic parameters of DM, CP, and neutral detergent fiber (NDF) degradation were estimated. In Experiment 2, 40 bulls with an average initial BW of 374 ± 16.5 kg were distributed into a 2 × 2 factorial in a randomized design with ten replicates. The trial lasted for 99 d and was divided into a 15-d period for adaptation and an 84-d period for data collection. The intake and digestibility of nutrients as well as animal performance were evaluated in Experiment 2. The potentially degradable fractions of DM, CP, and NDF of StS were lower than CS (P < 0.004). The diets containing StS showed lower ruminal digestibility of organic matter (OM) and lower total tract digestibility of OM, CP, and NDF than diets containing CS (P < 0.050). The StS-based diets showed higher values for ruminal pH in comparison with CS-based diets (P = 0.010). The ruminal NH 3 –N concentration was higher for the level of 130 g CP/kg diet in comparison with the 110 g CP/kg diet (P < 0.001). The dietary CP level affected urea nitrogen in blood (P < 0.001) and urine (P = 0.017), which were higher in the diets containing StS and CS at the level of 130 g CP/kg diet. The diets containing StS showed a higher intake of DM, OM, CP, NDF, and indigestible neutral detergent fiber (iNDF) than diets containing CS (P < 0.008). However, the amount of digested nutrients (kg/d) was similar between treatments (P > 0.050). The silage crop and dietary CP levels had no effect on productive performance (P > 0.050), but the StS-based diet tended to decrease feed efficiency (P = 0.085). Thus, StS, as well as the level of 110 g CP/kg diet, can be used to feed finishing beef cattle.
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spelling Effects of silage crop and dietary crude protein levels on digestibility, ruminal fermentation, nitrogen use efficiency, and performance of finishing beef cattleFeedlotCorn silageLegume silageStylosanthesTwo trials were conducted to evaluate the effects of silage crop and levels of dietary crude protein (CP) in Nellore beef cattle. The experimental diets consisted of Stylosanthes (StS) or corn silage (CS) with two levels of dietary CP, 110 and 130 g CP/kg diet on a dry matter (DM) basis. The forage to concentrate ratio was 50:50 on a DM basis. In Experiment 1, the four bulls that were used had an average initial body weight (BW) of 450 ± 37.9 kg, and were surgically cannulated in the rumen and abomasum. The bulls were assigned to a 4 × 4 Latin square with a 2 × 2 factorial design of treatments, and four 16-d periods. During this experiment, we collected ruminal fluid, abomasal digesta, feces, urine, and blood. In addition, the kinetic parameters of DM, CP, and neutral detergent fiber (NDF) degradation were estimated. In Experiment 2, 40 bulls with an average initial BW of 374 ± 16.5 kg were distributed into a 2 × 2 factorial in a randomized design with ten replicates. The trial lasted for 99 d and was divided into a 15-d period for adaptation and an 84-d period for data collection. The intake and digestibility of nutrients as well as animal performance were evaluated in Experiment 2. The potentially degradable fractions of DM, CP, and NDF of StS were lower than CS (P < 0.004). The diets containing StS showed lower ruminal digestibility of organic matter (OM) and lower total tract digestibility of OM, CP, and NDF than diets containing CS (P < 0.050). The StS-based diets showed higher values for ruminal pH in comparison with CS-based diets (P = 0.010). The ruminal NH 3 –N concentration was higher for the level of 130 g CP/kg diet in comparison with the 110 g CP/kg diet (P < 0.001). The dietary CP level affected urea nitrogen in blood (P < 0.001) and urine (P = 0.017), which were higher in the diets containing StS and CS at the level of 130 g CP/kg diet. The diets containing StS showed a higher intake of DM, OM, CP, NDF, and indigestible neutral detergent fiber (iNDF) than diets containing CS (P < 0.008). However, the amount of digested nutrients (kg/d) was similar between treatments (P > 0.050). The silage crop and dietary CP levels had no effect on productive performance (P > 0.050), but the StS-based diet tended to decrease feed efficiency (P = 0.085). Thus, StS, as well as the level of 110 g CP/kg diet, can be used to feed finishing beef cattle.Animal Feed Science and Technology2018-08-27T17:20:19Z2018-08-27T17:20:19Z2016-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlepdfapplication/pdf03778401https://doi.org/10.1016/j.anifeedsci.2016.07.008http://www.locus.ufv.br/handle/123456789/21442engv. 220, p. 22- 33, out. 2016Elsevier B.V.info:eu-repo/semantics/openAccessSilva, L.D. daPereira, O.G.Silva, T.C. daValadares Filho, S.C.Ribeiro, K.G.reponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFV2024-07-12T08:45:46Zoai:locus.ufv.br:123456789/21442Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452024-07-12T08:45:46LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv Effects of silage crop and dietary crude protein levels on digestibility, ruminal fermentation, nitrogen use efficiency, and performance of finishing beef cattle
title Effects of silage crop and dietary crude protein levels on digestibility, ruminal fermentation, nitrogen use efficiency, and performance of finishing beef cattle
spellingShingle Effects of silage crop and dietary crude protein levels on digestibility, ruminal fermentation, nitrogen use efficiency, and performance of finishing beef cattle
Silva, L.D. da
Feedlot
Corn silage
Legume silage
Stylosanthes
title_short Effects of silage crop and dietary crude protein levels on digestibility, ruminal fermentation, nitrogen use efficiency, and performance of finishing beef cattle
title_full Effects of silage crop and dietary crude protein levels on digestibility, ruminal fermentation, nitrogen use efficiency, and performance of finishing beef cattle
title_fullStr Effects of silage crop and dietary crude protein levels on digestibility, ruminal fermentation, nitrogen use efficiency, and performance of finishing beef cattle
title_full_unstemmed Effects of silage crop and dietary crude protein levels on digestibility, ruminal fermentation, nitrogen use efficiency, and performance of finishing beef cattle
title_sort Effects of silage crop and dietary crude protein levels on digestibility, ruminal fermentation, nitrogen use efficiency, and performance of finishing beef cattle
author Silva, L.D. da
author_facet Silva, L.D. da
Pereira, O.G.
Silva, T.C. da
Valadares Filho, S.C.
Ribeiro, K.G.
author_role author
author2 Pereira, O.G.
Silva, T.C. da
Valadares Filho, S.C.
Ribeiro, K.G.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Silva, L.D. da
Pereira, O.G.
Silva, T.C. da
Valadares Filho, S.C.
Ribeiro, K.G.
dc.subject.por.fl_str_mv Feedlot
Corn silage
Legume silage
Stylosanthes
topic Feedlot
Corn silage
Legume silage
Stylosanthes
description Two trials were conducted to evaluate the effects of silage crop and levels of dietary crude protein (CP) in Nellore beef cattle. The experimental diets consisted of Stylosanthes (StS) or corn silage (CS) with two levels of dietary CP, 110 and 130 g CP/kg diet on a dry matter (DM) basis. The forage to concentrate ratio was 50:50 on a DM basis. In Experiment 1, the four bulls that were used had an average initial body weight (BW) of 450 ± 37.9 kg, and were surgically cannulated in the rumen and abomasum. The bulls were assigned to a 4 × 4 Latin square with a 2 × 2 factorial design of treatments, and four 16-d periods. During this experiment, we collected ruminal fluid, abomasal digesta, feces, urine, and blood. In addition, the kinetic parameters of DM, CP, and neutral detergent fiber (NDF) degradation were estimated. In Experiment 2, 40 bulls with an average initial BW of 374 ± 16.5 kg were distributed into a 2 × 2 factorial in a randomized design with ten replicates. The trial lasted for 99 d and was divided into a 15-d period for adaptation and an 84-d period for data collection. The intake and digestibility of nutrients as well as animal performance were evaluated in Experiment 2. The potentially degradable fractions of DM, CP, and NDF of StS were lower than CS (P < 0.004). The diets containing StS showed lower ruminal digestibility of organic matter (OM) and lower total tract digestibility of OM, CP, and NDF than diets containing CS (P < 0.050). The StS-based diets showed higher values for ruminal pH in comparison with CS-based diets (P = 0.010). The ruminal NH 3 –N concentration was higher for the level of 130 g CP/kg diet in comparison with the 110 g CP/kg diet (P < 0.001). The dietary CP level affected urea nitrogen in blood (P < 0.001) and urine (P = 0.017), which were higher in the diets containing StS and CS at the level of 130 g CP/kg diet. The diets containing StS showed a higher intake of DM, OM, CP, NDF, and indigestible neutral detergent fiber (iNDF) than diets containing CS (P < 0.008). However, the amount of digested nutrients (kg/d) was similar between treatments (P > 0.050). The silage crop and dietary CP levels had no effect on productive performance (P > 0.050), but the StS-based diet tended to decrease feed efficiency (P = 0.085). Thus, StS, as well as the level of 110 g CP/kg diet, can be used to feed finishing beef cattle.
publishDate 2016
dc.date.none.fl_str_mv 2016-10
2018-08-27T17:20:19Z
2018-08-27T17:20:19Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv 03778401
https://doi.org/10.1016/j.anifeedsci.2016.07.008
http://www.locus.ufv.br/handle/123456789/21442
identifier_str_mv 03778401
url https://doi.org/10.1016/j.anifeedsci.2016.07.008
http://www.locus.ufv.br/handle/123456789/21442
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv v. 220, p. 22- 33, out. 2016
dc.rights.driver.fl_str_mv Elsevier B.V.
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Elsevier B.V.
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv pdf
application/pdf
dc.publisher.none.fl_str_mv Animal Feed Science and Technology
publisher.none.fl_str_mv Animal Feed Science and Technology
dc.source.none.fl_str_mv reponame:LOCUS Repositório Institucional da UFV
instname:Universidade Federal de Viçosa (UFV)
instacron:UFV
instname_str Universidade Federal de Viçosa (UFV)
instacron_str UFV
institution UFV
reponame_str LOCUS Repositório Institucional da UFV
collection LOCUS Repositório Institucional da UFV
repository.name.fl_str_mv LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)
repository.mail.fl_str_mv fabiojreis@ufv.br
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