Effect of ryegrass hay and ryegrass silage, cut at two stages of development, on nutrient digestibility, nitrogen balance, and purine derivative excretion in growing sheep

The objective of this study was to evaluate nutrient digestibility, nitrogen balance, and purine derivative excretion from growing sheep fed on ryegrass silage (S) or ryegrass hay (H) cut at two maturity stages (21 and 35 d). In an in vivo trial, 32 Suffolk × Merino growing sheep (22 ± 2 kg) were us...

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Autores principales:	Manuel Gonzalez-Ronquillo, Lizbeth E. Robles-Jiménez, Jose Romero-Bernal, Cynthia Ariciaga-Gonzalez, Bulmaro Valdez-Ramírez, Alfonso J. Chay-Canul, Einar Vargas-Bello-Pérez
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2021
Materias:	allantoin in vitro purine derivatives ryegrass rumen fermentation Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/9c5f9547e8254f85bf79480743fd495a
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spelling	oai:doaj.org-article:9c5f9547e8254f85bf79480743fd495a2021-12-01T14:40:59ZEffect of ryegrass hay and ryegrass silage, cut at two stages of development, on nutrient digestibility, nitrogen balance, and purine derivative excretion in growing sheep1594-40771828-051X10.1080/1828051X.2021.2000342https://doaj.org/article/9c5f9547e8254f85bf79480743fd495a2021-01-01T00:00:00Zhttp://dx.doi.org/10.1080/1828051X.2021.2000342https://doaj.org/toc/1594-4077https://doaj.org/toc/1828-051XThe objective of this study was to evaluate nutrient digestibility, nitrogen balance, and purine derivative excretion from growing sheep fed on ryegrass silage (S) or ryegrass hay (H) cut at two maturity stages (21 and 35 d). In an in vivo trial, 32 Suffolk × Merino growing sheep (22 ± 2 kg) were used in a completely randomised design with eighth replications in a 2 × 2 factorial arrangement. Four diets were used containing 75% forage (S at 21 or 35 d and H at 21 or 35 d) and 25% concentrate. In an in vitro trial, a completely randomised design was used for gas production parameters. Contents of N and NDF were higher in H (30 and 674 g/kg DM) than in S (26 and 411 g/kg DM). Animals fed on S had higher digestibility (P < .008) of DM and OM (661 and 715 g/kg) than H at 35 d (557 and 596 g/kg). In vitro gas production was lower (P < .04) in H at 35 d. In vitro DM disappearance at 96 h was lower (P < .03) for H at 35 d. Excretion of allantoin (mmol/day) in urine was higher (P < .001) in S (7.91 and 3.95) than H (5.01 and 3.03) at 21 and 35 d respectively. Overall, compared to ryegrass hay, ryegrass silage cut at 21 d can be an advantageous feeding strategy for growing sheep without negative effects in nutrient intake, N-balance, and purine derivatives.Highlights Contents of N and NDF were higher in hay than in silage form ryegrass. Animals fed on silage had higher digestibility of DM and OM. In vitro gas production was lower in hay cut at 35 days.Manuel Gonzalez-RonquilloLizbeth E. Robles-JiménezJose Romero-BernalCynthia Ariciaga-GonzalezBulmaro Valdez-RamírezAlfonso J. Chay-CanulEinar Vargas-Bello-PérezTaylor & Francis Grouparticleallantoinin vitropurine derivativesryegrassrumen fermentationAnimal cultureSF1-1100ENItalian Journal of Animal Science, Vol 20, Iss 1, Pp 2110-2121 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	allantoin in vitro purine derivatives ryegrass rumen fermentation Animal culture SF1-1100
spellingShingle	allantoin in vitro purine derivatives ryegrass rumen fermentation Animal culture SF1-1100 Manuel Gonzalez-Ronquillo Lizbeth E. Robles-Jiménez Jose Romero-Bernal Cynthia Ariciaga-Gonzalez Bulmaro Valdez-Ramírez Alfonso J. Chay-Canul Einar Vargas-Bello-Pérez Effect of ryegrass hay and ryegrass silage, cut at two stages of development, on nutrient digestibility, nitrogen balance, and purine derivative excretion in growing sheep
description	The objective of this study was to evaluate nutrient digestibility, nitrogen balance, and purine derivative excretion from growing sheep fed on ryegrass silage (S) or ryegrass hay (H) cut at two maturity stages (21 and 35 d). In an in vivo trial, 32 Suffolk × Merino growing sheep (22 ± 2 kg) were used in a completely randomised design with eighth replications in a 2 × 2 factorial arrangement. Four diets were used containing 75% forage (S at 21 or 35 d and H at 21 or 35 d) and 25% concentrate. In an in vitro trial, a completely randomised design was used for gas production parameters. Contents of N and NDF were higher in H (30 and 674 g/kg DM) than in S (26 and 411 g/kg DM). Animals fed on S had higher digestibility (P < .008) of DM and OM (661 and 715 g/kg) than H at 35 d (557 and 596 g/kg). In vitro gas production was lower (P < .04) in H at 35 d. In vitro DM disappearance at 96 h was lower (P < .03) for H at 35 d. Excretion of allantoin (mmol/day) in urine was higher (P < .001) in S (7.91 and 3.95) than H (5.01 and 3.03) at 21 and 35 d respectively. Overall, compared to ryegrass hay, ryegrass silage cut at 21 d can be an advantageous feeding strategy for growing sheep without negative effects in nutrient intake, N-balance, and purine derivatives.Highlights Contents of N and NDF were higher in hay than in silage form ryegrass. Animals fed on silage had higher digestibility of DM and OM. In vitro gas production was lower in hay cut at 35 days.
format	article
author	Manuel Gonzalez-Ronquillo Lizbeth E. Robles-Jiménez Jose Romero-Bernal Cynthia Ariciaga-Gonzalez Bulmaro Valdez-Ramírez Alfonso J. Chay-Canul Einar Vargas-Bello-Pérez
author_facet	Manuel Gonzalez-Ronquillo Lizbeth E. Robles-Jiménez Jose Romero-Bernal Cynthia Ariciaga-Gonzalez Bulmaro Valdez-Ramírez Alfonso J. Chay-Canul Einar Vargas-Bello-Pérez
author_sort	Manuel Gonzalez-Ronquillo
title	Effect of ryegrass hay and ryegrass silage, cut at two stages of development, on nutrient digestibility, nitrogen balance, and purine derivative excretion in growing sheep
title_short	Effect of ryegrass hay and ryegrass silage, cut at two stages of development, on nutrient digestibility, nitrogen balance, and purine derivative excretion in growing sheep
title_full	Effect of ryegrass hay and ryegrass silage, cut at two stages of development, on nutrient digestibility, nitrogen balance, and purine derivative excretion in growing sheep
title_fullStr	Effect of ryegrass hay and ryegrass silage, cut at two stages of development, on nutrient digestibility, nitrogen balance, and purine derivative excretion in growing sheep
title_full_unstemmed	Effect of ryegrass hay and ryegrass silage, cut at two stages of development, on nutrient digestibility, nitrogen balance, and purine derivative excretion in growing sheep
title_sort	effect of ryegrass hay and ryegrass silage, cut at two stages of development, on nutrient digestibility, nitrogen balance, and purine derivative excretion in growing sheep
publisher	Taylor & Francis Group
publishDate	2021
url	https://doaj.org/article/9c5f9547e8254f85bf79480743fd495a
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Effect of ryegrass hay and ryegrass silage, cut at two stages of development, on nutrient digestibility, nitrogen balance, and purine derivative excretion in growing sheep

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