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Biblioteca (s) : |
INIA Tacuarembó. |
Fecha : |
12/09/2014 |
Actualizado : |
23/02/2015 |
Autor : |
OLMOS, F.; SOCA, P.; SOSA, M.; DO CARMO, M.; CAL, V.; BENTANCUR, D.; GENRO, C.; GARCÍA, E. |
Afiliación : |
FERNANDO ELCEAR OLMOS LOPEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARTIN DO CARMO CORUJO, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay. |
Título : |
Respuesta al manejo de factores ecológicos en Coelorachis selloana (HACK) en la región Noreste de Uruguay |
Fecha de publicación : |
2013 |
Fuente / Imprenta : |
Revista de la Facultad de Agronomía UNLPam, 2013, v. 22, Serie supl.2, p. 123-128 |
Volumen : |
22 |
Páginas : |
123-128 |
Idioma : |
Español |
Contenido : |
Se presentan los resultados de 5 experimentos con Coelorachis selloana, una especie
nativa de la región noreste de Uruguay; se estudiaron factores ecológicos en condiciones
de campo y en el invernáculo. La especie se encontró principalmente en los suelos arcillosos
y respondió linealmente a la aplicación de nitrógeno hasta 100 unidades; el estrés
hídrico afectó significativa y negativamente su producción total de materia seca comparado
con un testigo con riego, la alta frecuencia e intensidad de corte (corte a 2 cm. y 2 semanas)
redujeron significativamente su productividad comparado con una situación de alivio
(corte cada 8 semanas); en condiciones de campo, una mayor oferta de forraje incrementó
significativamente su presencia durante la estación de crecimiento comparado con una
menor oferta de forraje. |
Thesagro : |
COELORACHIS; ESTRES HIDRICO; NITROGENO; URUGUAY. |
Asunto categoría : |
-- |
Marc : |
LEADER 01581naa a2200277 a 4500 001 1050188 005 2015-02-23 008 2013 bl uuuu u00u1 u #d 100 1 $aOLMOS, F. 245 $aRespuesta al manejo de factores ecológicos en Coelorachis selloana (HACK) en la región Noreste de Uruguay 260 $c2013 300 $a123-128 22 490 $v22 520 $aSe presentan los resultados de 5 experimentos con Coelorachis selloana, una especie nativa de la región noreste de Uruguay; se estudiaron factores ecológicos en condiciones de campo y en el invernáculo. La especie se encontró principalmente en los suelos arcillosos y respondió linealmente a la aplicación de nitrógeno hasta 100 unidades; el estrés hídrico afectó significativa y negativamente su producción total de materia seca comparado con un testigo con riego, la alta frecuencia e intensidad de corte (corte a 2 cm. y 2 semanas) redujeron significativamente su productividad comparado con una situación de alivio (corte cada 8 semanas); en condiciones de campo, una mayor oferta de forraje incrementó significativamente su presencia durante la estación de crecimiento comparado con una menor oferta de forraje. 650 $aCOELORACHIS 650 $aESTRES HIDRICO 650 $aNITROGENO 650 $aURUGUAY 700 1 $aSOCA, P. 700 1 $aSOSA, M. 700 1 $aDO CARMO, M. 700 1 $aCAL, V. 700 1 $aBENTANCUR, D. 700 1 $aGENRO, C. 700 1 $aGARCÍA, E. 773 $tRevista de la Facultad de Agronomía UNLPam, 2013$gv. 22, Serie supl.2, p. 123-128
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Registro completo
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Biblioteca (s) : |
INIA Las Brujas; INIA Treinta y Tres. |
Fecha actual : |
12/09/2014 |
Actualizado : |
25/11/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
A - 2 |
Autor : |
ENRÍQUEZ, D.H.; UNGERFELD, R.; QUINTANS, G.; GUIDONI, A.L.; HÖTZEL, M.J. |
Afiliación : |
GRACIELA QUINTANS ILARIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
The effects of alternative weaning methods on behaviour in beef calves. |
Fecha de publicación : |
2010 |
Fuente / Imprenta : |
Livestock Science, 2010, 128 (1-3): 20-27 |
ISSN : |
1871-1413 |
DOI : |
10.1016/j.livsci.2009.10.007 |
Idioma : |
Inglés |
Notas : |
Article history: received 14 May 2009; received in revised form 24 September 2009; accepted 10 October 2009. Published 2010. |
Contenido : |
Abstract:
The aim of this experiment was to compare the behavioural responses and weight change of beef calves weaned using three weaning methods. Forty-eight primiparous Hereford or Hereford ×Angus nursing beef calves (180.7± 1.3 days old; mean± SEM) were assigned to one of three treatments: 1) CON: weaned abruptly on day 0; 2) FEN: calves were separated by fence line from dams on day ?17 but remained in visual sight of one another; or 3) NF: cows and
calves remained together but suckling was prevented on day ?17 by inserting a nose-flap antisuckling device. In all treatments remote physical separation of the cow and calf took place on day 0. Behaviours were recorded by instantaneous sampling from day ?20 to day ?13, and from day ?3 to day 5, except on day 0. Distance between cows and calves and the fence line in FEN calves and between the dyads in NF calves were recorded from day ?17 to day ?13. Body
weights of calves were recorded on days ?24, ?11, 0, 7 and 21. There was a day and treatment by day interaction for all behaviours. Behavioural responses were strongest during the first 2 days after fence line separation in the FEN calves and after remote separation in the CON calves. For the NF calves, behavioural effects were observed immediately after insertion of the nose-flaps, including numerous unrewarded suckling events, and again when remote physical separation took place. Overall the FEN calves vocalized (P<0.03) more than CON and NF calves.
CON calves played (P<0.02) and ruminated (P<0.04) more often than FEN and NF calves, and walked (P=0.01) more than NF. On day ?17 and day ?16, FEN calves (and their dams) spent more time within 30 m of the fence line than on day ?15 to day ?13 (P<0.02). NF calves spent more time in close proximity of their dams on day ?17 and day ?16 (P<0.001). Calves of the CON treatment had a greater average daily gain (ADG) than FEN and NF calves (P<0.008);
ADG was greater in FEN than in NF calves (P= 0.02). Two-stage weaning with nose-flaps resulted in a second distress response after remote physical separation from the dam, and a drop in ADG in both periods indicating that the response was distributed between the two stages. In calves weaned using the fence line method, the response was more prolonged and more intense, with no advantages for weight gain compared to abrupt weaning. In conclusion, the two
alternative weaning methods did not appear to provide any clear benefits in reducing weaning distress in beef calves compared to abrupt weaning in the conditions used in this experiment.
However, the use of nose-flaps seems to reduce distress better than fence line separation. MenosAbstract:
The aim of this experiment was to compare the behavioural responses and weight change of beef calves weaned using three weaning methods. Forty-eight primiparous Hereford or Hereford ×Angus nursing beef calves (180.7± 1.3 days old; mean± SEM) were assigned to one of three treatments: 1) CON: weaned abruptly on day 0; 2) FEN: calves were separated by fence line from dams on day ?17 but remained in visual sight of one another; or 3) NF: cows and
calves remained together but suckling was prevented on day ?17 by inserting a nose-flap antisuckling device. In all treatments remote physical separation of the cow and calf took place on day 0. Behaviours were recorded by instantaneous sampling from day ?20 to day ?13, and from day ?3 to day 5, except on day 0. Distance between cows and calves and the fence line in FEN calves and between the dyads in NF calves were recorded from day ?17 to day ?13. Body
weights of calves were recorded on days ?24, ?11, 0, 7 and 21. There was a day and treatment by day interaction for all behaviours. Behavioural responses were strongest during the first 2 days after fence line separation in the FEN calves and after remote separation in the CON calves. For the NF calves, behavioural effects were observed immediately after insertion of the nose-flaps, including numerous unrewarded suckling events, and again when remote physical separation took place. Overall the FEN calves vocalized (P<0.03) more than CON and NF calves.
CON calves played (P<0.02... Presentar Todo |
Palabras claves : |
BEEF CATTLE; BEHAVIOUR; CALVES; STRESS; WEANING. |
Thesagro : |
COMPORTAMIENTO; DESTETE; ESTRES; GANADO VACUNO; TERNEROS. |
Asunto categoría : |
-- L02 Alimentación animal |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/4478/1/Quintans-arb-2010-4.pdf
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Marc : |
LEADER 03613naa a2200325 a 4500 001 1012823 005 2019-11-25 008 2010 bl uuuu u00u1 u #d 022 $a1871-1413 024 7 $a10.1016/j.livsci.2009.10.007$2DOI 100 1 $aENRÍQUEZ, D.H. 245 $aThe effects of alternative weaning methods on behaviour in beef calves.$h[electronic resource] 260 $c2010 500 $aArticle history: received 14 May 2009; received in revised form 24 September 2009; accepted 10 October 2009. Published 2010. 520 $aAbstract: The aim of this experiment was to compare the behavioural responses and weight change of beef calves weaned using three weaning methods. Forty-eight primiparous Hereford or Hereford ×Angus nursing beef calves (180.7± 1.3 days old; mean± SEM) were assigned to one of three treatments: 1) CON: weaned abruptly on day 0; 2) FEN: calves were separated by fence line from dams on day ?17 but remained in visual sight of one another; or 3) NF: cows and calves remained together but suckling was prevented on day ?17 by inserting a nose-flap antisuckling device. In all treatments remote physical separation of the cow and calf took place on day 0. Behaviours were recorded by instantaneous sampling from day ?20 to day ?13, and from day ?3 to day 5, except on day 0. Distance between cows and calves and the fence line in FEN calves and between the dyads in NF calves were recorded from day ?17 to day ?13. Body weights of calves were recorded on days ?24, ?11, 0, 7 and 21. There was a day and treatment by day interaction for all behaviours. Behavioural responses were strongest during the first 2 days after fence line separation in the FEN calves and after remote separation in the CON calves. For the NF calves, behavioural effects were observed immediately after insertion of the nose-flaps, including numerous unrewarded suckling events, and again when remote physical separation took place. Overall the FEN calves vocalized (P<0.03) more than CON and NF calves. CON calves played (P<0.02) and ruminated (P<0.04) more often than FEN and NF calves, and walked (P=0.01) more than NF. On day ?17 and day ?16, FEN calves (and their dams) spent more time within 30 m of the fence line than on day ?15 to day ?13 (P<0.02). NF calves spent more time in close proximity of their dams on day ?17 and day ?16 (P<0.001). Calves of the CON treatment had a greater average daily gain (ADG) than FEN and NF calves (P<0.008); ADG was greater in FEN than in NF calves (P= 0.02). Two-stage weaning with nose-flaps resulted in a second distress response after remote physical separation from the dam, and a drop in ADG in both periods indicating that the response was distributed between the two stages. In calves weaned using the fence line method, the response was more prolonged and more intense, with no advantages for weight gain compared to abrupt weaning. In conclusion, the two alternative weaning methods did not appear to provide any clear benefits in reducing weaning distress in beef calves compared to abrupt weaning in the conditions used in this experiment. However, the use of nose-flaps seems to reduce distress better than fence line separation. 650 $aCOMPORTAMIENTO 650 $aDESTETE 650 $aESTRES 650 $aGANADO VACUNO 650 $aTERNEROS 653 $aBEEF CATTLE 653 $aBEHAVIOUR 653 $aCALVES 653 $aSTRESS 653 $aWEANING 700 1 $aUNGERFELD, R. 700 1 $aQUINTANS, G. 700 1 $aGUIDONI, A.L. 700 1 $aHÖTZEL, M.J. 773 $tLivestock Science, 2010, 128 (1-3): 20-27
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