Feed intake, nutrient digestibility, and selected rumen parameters in feedlot bulls fed diets with different feed additives

An experiment was conducted to evaluate the feed intake, nutrient digestibility and selected rumen parameters in feedlot bulls fed diets containing different feed additives. Six rumen-cannulated Nellore bulls (age = 8 ± 1.0 months; initial BW = 225 ± 13.2 kg) were distributed in a 6 × 6 Latin square...

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Autores principales:	Breno de Castro Silva, Marcos Vinicius Carneiro Pacheco, Letícia Artuzo Godoi, Gilyard Angelo Pinheiro de Souza, Nathália Veloso Trópia, Pauliane Pucetti, Flávia Adriane de Sales Silva, Ana Clara Baião Menezes, Luciana Navajas Rennó, Mário Fonseca Paulino, Jon Patrick Schoonmaker, Sebastião de Campos Valadares Filho
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a8e0e537de084cbb8e98ad7bf90746bd
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spelling	oai:doaj.org-article:a8e0e537de084cbb8e98ad7bf90746bd2021-11-11T06:44:19ZFeed intake, nutrient digestibility, and selected rumen parameters in feedlot bulls fed diets with different feed additives1932-6203https://doaj.org/article/a8e0e537de084cbb8e98ad7bf90746bd2021-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC8562795/?tool=EBIhttps://doaj.org/toc/1932-6203An experiment was conducted to evaluate the feed intake, nutrient digestibility and selected rumen parameters in feedlot bulls fed diets containing different feed additives. Six rumen-cannulated Nellore bulls (age = 8 ± 1.0 months; initial BW = 225 ± 13.2 kg) were distributed in a 6 × 6 Latin square design. Six experimental diets based on 30% corn silage and 70% concentrate on a dry matter (DM) basis were evaluated. Diets differed in feed additive on a DM basis, as follows: 1.4% bicarbonate and magnesium oxide in 3:1 ratio (BOX); 36 ppm lasalocid sodium (LAS); 30 ppm monensin sodium (MON); 25 ppm virginiamycin (VIR); 30 ppm monensin sodium plus 25 ppm virginiamycin (MV); and 3.15% commercial mineral supplement containing D-limonene and exogenous α-amylase (EOA). The experiment lasted 144 d, with six periods of 24 d. Each period consisted of 14 d for dietary adaptation, 3 d for feces and urine collection, and 7 d for omasal and ruminal digesta collection. Bulls fed the BOX diet showed greater (P < 0.05) intake of DM, organic matter (OM), neutral detergent fiber (apNDF), crude protein (CP), and starch compared to the other diets. Diets with LAS, MON, VIR, MV, or EOA did not influence (P > 0.05) the DM, OM, apNDF, CP, or starch intake of feedlot bulls. Bulls fed the EOA diet showed greater (trend; P = 0.09) ruminal digestibility of starch compared to the other diets. The feed additives did not affect (P > 0.05) the intestinal or total tract digestibility of starch, rumen pH, microbial efficiency, total rumen fluid, dilution rate, rate of intake, rate of degradation, or passage rate of the DM, OM, apNDF, and starch. In conclusion, LAS, MON, VIR, MV, and EOA diets reduced nutrient intake compared to BOX. Although all feed additives presented similar effects on rumen pH, temperature, and kinetics the presence of exogenous α-amylase in the EOA diet may increase ruminal starch digestibility and apparent total tract digestibility of DM and OM.Breno de Castro SilvaMarcos Vinicius Carneiro PachecoLetícia Artuzo GodoiGilyard Angelo Pinheiro de SouzaNathália Veloso TrópiaPauliane PucettiFlávia Adriane de Sales SilvaAna Clara Baião MenezesLuciana Navajas RennóMário Fonseca PaulinoJon Patrick SchoonmakerSebastião de Campos Valadares FilhoPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Breno de Castro Silva Marcos Vinicius Carneiro Pacheco Letícia Artuzo Godoi Gilyard Angelo Pinheiro de Souza Nathália Veloso Trópia Pauliane Pucetti Flávia Adriane de Sales Silva Ana Clara Baião Menezes Luciana Navajas Rennó Mário Fonseca Paulino Jon Patrick Schoonmaker Sebastião de Campos Valadares Filho Feed intake, nutrient digestibility, and selected rumen parameters in feedlot bulls fed diets with different feed additives
description	An experiment was conducted to evaluate the feed intake, nutrient digestibility and selected rumen parameters in feedlot bulls fed diets containing different feed additives. Six rumen-cannulated Nellore bulls (age = 8 ± 1.0 months; initial BW = 225 ± 13.2 kg) were distributed in a 6 × 6 Latin square design. Six experimental diets based on 30% corn silage and 70% concentrate on a dry matter (DM) basis were evaluated. Diets differed in feed additive on a DM basis, as follows: 1.4% bicarbonate and magnesium oxide in 3:1 ratio (BOX); 36 ppm lasalocid sodium (LAS); 30 ppm monensin sodium (MON); 25 ppm virginiamycin (VIR); 30 ppm monensin sodium plus 25 ppm virginiamycin (MV); and 3.15% commercial mineral supplement containing D-limonene and exogenous α-amylase (EOA). The experiment lasted 144 d, with six periods of 24 d. Each period consisted of 14 d for dietary adaptation, 3 d for feces and urine collection, and 7 d for omasal and ruminal digesta collection. Bulls fed the BOX diet showed greater (P < 0.05) intake of DM, organic matter (OM), neutral detergent fiber (apNDF), crude protein (CP), and starch compared to the other diets. Diets with LAS, MON, VIR, MV, or EOA did not influence (P > 0.05) the DM, OM, apNDF, CP, or starch intake of feedlot bulls. Bulls fed the EOA diet showed greater (trend; P = 0.09) ruminal digestibility of starch compared to the other diets. The feed additives did not affect (P > 0.05) the intestinal or total tract digestibility of starch, rumen pH, microbial efficiency, total rumen fluid, dilution rate, rate of intake, rate of degradation, or passage rate of the DM, OM, apNDF, and starch. In conclusion, LAS, MON, VIR, MV, and EOA diets reduced nutrient intake compared to BOX. Although all feed additives presented similar effects on rumen pH, temperature, and kinetics the presence of exogenous α-amylase in the EOA diet may increase ruminal starch digestibility and apparent total tract digestibility of DM and OM.
format	article
author	Breno de Castro Silva Marcos Vinicius Carneiro Pacheco Letícia Artuzo Godoi Gilyard Angelo Pinheiro de Souza Nathália Veloso Trópia Pauliane Pucetti Flávia Adriane de Sales Silva Ana Clara Baião Menezes Luciana Navajas Rennó Mário Fonseca Paulino Jon Patrick Schoonmaker Sebastião de Campos Valadares Filho
author_facet	Breno de Castro Silva Marcos Vinicius Carneiro Pacheco Letícia Artuzo Godoi Gilyard Angelo Pinheiro de Souza Nathália Veloso Trópia Pauliane Pucetti Flávia Adriane de Sales Silva Ana Clara Baião Menezes Luciana Navajas Rennó Mário Fonseca Paulino Jon Patrick Schoonmaker Sebastião de Campos Valadares Filho
author_sort	Breno de Castro Silva
title	Feed intake, nutrient digestibility, and selected rumen parameters in feedlot bulls fed diets with different feed additives
title_short	Feed intake, nutrient digestibility, and selected rumen parameters in feedlot bulls fed diets with different feed additives
title_full	Feed intake, nutrient digestibility, and selected rumen parameters in feedlot bulls fed diets with different feed additives
title_fullStr	Feed intake, nutrient digestibility, and selected rumen parameters in feedlot bulls fed diets with different feed additives
title_full_unstemmed	Feed intake, nutrient digestibility, and selected rumen parameters in feedlot bulls fed diets with different feed additives
title_sort	feed intake, nutrient digestibility, and selected rumen parameters in feedlot bulls fed diets with different feed additives
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/a8e0e537de084cbb8e98ad7bf90746bd
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Feed intake, nutrient digestibility, and selected rumen parameters in feedlot bulls fed diets with different feed additives

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