Changes in ruminal fermentation and mineral serum level in animals kept in high temperature environments
In order to evaluate the effect of environmental temperature on ruminal fermentation and on mineral levels of growing ruminants, it was used 12 male calves (initial average weight 82.9 ± 7.7 kg, 100 days of age), were employed in a randomized block design (by weight) experiment, with repeated weight measurement and two environmental temperatures: thermoneutral (24ºC) and heat-stressed (33ºC), during 38 days. The animals exposed to 33ºC presented lower dry matter ingestion, lower T3 (triiodothyronine) serum level, higher ammoniacal nitrogen (NH3-N) level in the rumen liquid, and higher rectal and body temperatures during all the experimental period when compared to the animals kept in thermoneutral environment (24ºC). The animals kept under heat stress environment (33ºC) presented higher calcium serum level, which was the highest on 31st day and the lowest on the 38th day of the experiment; phosphorus level was the lowest during all the experimental period; sodium level was lower on the 17th, 31st and 38th experimental days. Potassium and zinc levels were lower after 24 days; copper level was lower until the 24th day; magnesium level was higher until the 17th day, if compared to the ones from the animals kept in thermoneutral environment (24ºC). The heat-stressed animals presented higher levels of ammoniacal nitrogen in the ruminal liquid and a decrease in the phosphorus, sodium, potassium and zinc serum levels. These results show the necessity of changes on feed management to ruminants in temperatures over the thermal comfort limits so that performance loss is decreased.
Autores principales: | , , , , |
---|---|
Formato: | Digital revista |
Idioma: | English |
Publicado: |
Sociedade Brasileira de Zootecnia
2010
|
Acceso en línea: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000400025 |
Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
id |
oai:scielo:S1516-35982010000400025 |
---|---|
record_format |
ojs |
spelling |
oai:scielo:S1516-359820100004000252010-08-31Changes in ruminal fermentation and mineral serum level in animals kept in high temperature environmentsSalles,Márcia Saladini VieiraZanetti,Marcus AntonioSalles,Fernando AndréTitto,Evaldo Antonio LencioniConti,Renata Maria Consentino ammoniacal nitrogen dry matter ingestion heat stress macromineral micromineral volatile fatty acids In order to evaluate the effect of environmental temperature on ruminal fermentation and on mineral levels of growing ruminants, it was used 12 male calves (initial average weight 82.9 ± 7.7 kg, 100 days of age), were employed in a randomized block design (by weight) experiment, with repeated weight measurement and two environmental temperatures: thermoneutral (24ºC) and heat-stressed (33ºC), during 38 days. The animals exposed to 33ºC presented lower dry matter ingestion, lower T3 (triiodothyronine) serum level, higher ammoniacal nitrogen (NH3-N) level in the rumen liquid, and higher rectal and body temperatures during all the experimental period when compared to the animals kept in thermoneutral environment (24ºC). The animals kept under heat stress environment (33ºC) presented higher calcium serum level, which was the highest on 31st day and the lowest on the 38th day of the experiment; phosphorus level was the lowest during all the experimental period; sodium level was lower on the 17th, 31st and 38th experimental days. Potassium and zinc levels were lower after 24 days; copper level was lower until the 24th day; magnesium level was higher until the 17th day, if compared to the ones from the animals kept in thermoneutral environment (24ºC). The heat-stressed animals presented higher levels of ammoniacal nitrogen in the ruminal liquid and a decrease in the phosphorus, sodium, potassium and zinc serum levels. These results show the necessity of changes on feed management to ruminants in temperatures over the thermal comfort limits so that performance loss is decreased.info:eu-repo/semantics/openAccessSociedade Brasileira de ZootecniaRevista Brasileira de Zootecnia v.39 n.4 20102010-04-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000400025en10.1590/S1516-35982010000400025 |
institution |
SCIELO |
collection |
OJS |
country |
Brasil |
countrycode |
BR |
component |
Revista |
access |
En linea |
databasecode |
rev-scielo-br |
tag |
revista |
region |
America del Sur |
libraryname |
SciELO |
language |
English |
format |
Digital |
author |
Salles,Márcia Saladini Vieira Zanetti,Marcus Antonio Salles,Fernando André Titto,Evaldo Antonio Lencioni Conti,Renata Maria Consentino |
spellingShingle |
Salles,Márcia Saladini Vieira Zanetti,Marcus Antonio Salles,Fernando André Titto,Evaldo Antonio Lencioni Conti,Renata Maria Consentino Changes in ruminal fermentation and mineral serum level in animals kept in high temperature environments |
author_facet |
Salles,Márcia Saladini Vieira Zanetti,Marcus Antonio Salles,Fernando André Titto,Evaldo Antonio Lencioni Conti,Renata Maria Consentino |
author_sort |
Salles,Márcia Saladini Vieira |
title |
Changes in ruminal fermentation and mineral serum level in animals kept in high temperature environments |
title_short |
Changes in ruminal fermentation and mineral serum level in animals kept in high temperature environments |
title_full |
Changes in ruminal fermentation and mineral serum level in animals kept in high temperature environments |
title_fullStr |
Changes in ruminal fermentation and mineral serum level in animals kept in high temperature environments |
title_full_unstemmed |
Changes in ruminal fermentation and mineral serum level in animals kept in high temperature environments |
title_sort |
changes in ruminal fermentation and mineral serum level in animals kept in high temperature environments |
description |
In order to evaluate the effect of environmental temperature on ruminal fermentation and on mineral levels of growing ruminants, it was used 12 male calves (initial average weight 82.9 ± 7.7 kg, 100 days of age), were employed in a randomized block design (by weight) experiment, with repeated weight measurement and two environmental temperatures: thermoneutral (24ºC) and heat-stressed (33ºC), during 38 days. The animals exposed to 33ºC presented lower dry matter ingestion, lower T3 (triiodothyronine) serum level, higher ammoniacal nitrogen (NH3-N) level in the rumen liquid, and higher rectal and body temperatures during all the experimental period when compared to the animals kept in thermoneutral environment (24ºC). The animals kept under heat stress environment (33ºC) presented higher calcium serum level, which was the highest on 31st day and the lowest on the 38th day of the experiment; phosphorus level was the lowest during all the experimental period; sodium level was lower on the 17th, 31st and 38th experimental days. Potassium and zinc levels were lower after 24 days; copper level was lower until the 24th day; magnesium level was higher until the 17th day, if compared to the ones from the animals kept in thermoneutral environment (24ºC). The heat-stressed animals presented higher levels of ammoniacal nitrogen in the ruminal liquid and a decrease in the phosphorus, sodium, potassium and zinc serum levels. These results show the necessity of changes on feed management to ruminants in temperatures over the thermal comfort limits so that performance loss is decreased. |
publisher |
Sociedade Brasileira de Zootecnia |
publishDate |
2010 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000400025 |
work_keys_str_mv |
AT sallesmarciasaladinivieira changesinruminalfermentationandmineralserumlevelinanimalskeptinhightemperatureenvironments AT zanettimarcusantonio changesinruminalfermentationandmineralserumlevelinanimalskeptinhightemperatureenvironments AT sallesfernandoandre changesinruminalfermentationandmineralserumlevelinanimalskeptinhightemperatureenvironments AT tittoevaldoantoniolencioni changesinruminalfermentationandmineralserumlevelinanimalskeptinhightemperatureenvironments AT contirenatamariaconsentino changesinruminalfermentationandmineralserumlevelinanimalskeptinhightemperatureenvironments |
_version_ |
1756422223532392448 |