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Efecto de la disponibilidad de pasto y del tiempo de pastoreo sobre el comportamiento ingestivo del ganado ovino de raza merina

Authors: Mantecón, Ángel R.; Iason, G. R.; González, Jesús Salvador; Sim, D. A.; Fernández Bermúdez, Florentino;

Efecto de la disponibilidad de pasto y del tiempo de pastoreo sobre el comportamiento ingestivo del ganado ovino de raza merina

Abstract

[ES] Se utilizaron un total de ocho parcelas de regadío de un pasto sembrado, distribuidas siguiendo un diseño factorial 2x2x2: 2 alturas de pasto (alto-5,5 cm y bajo- 3,5 cm), 2 sistemas de pastoreo (restringido-R y no restringido- NR el tiempo de acceso al pasto) y 2 réplicas: utilizando 5 ovejas con sus corderos por parcela para el control del comportamiento ingestivo de los animales. La pérdida de condición corporal fue de 0,275 0,025 unidades para los tratamientos R y NR respectivamente, siendo esta diferencia estadísticamente significativa (P<0,05) sólamente en el grupo de más altura de pasto. El efecto del sistema de pastoreo fue estadísticamente significativo (P<0,00l) para todos los parámetros del comportamiento ingestivo considerados. Las ovejas del grupo R tenian un menor número de comidas por día (3,4 vs 7,4), con una duración media mayor cada una de ellas (139,9 vs 87,5 minutos), aunque este mayor valor no llega a compensar el tiempo de pastoreo diario, que fue inferior (475,8 vs 652,8 minutos). El número de bocados tomados por minuto fue significativamente mayor en los animales del grupo R (43,4 vs 39,6) El tiempo real de pastoreo y el número de comidas por día se vieron afectados de forma estadísticamente significativa (P<0,05) por efecto de la altura del pasto, con un menor valor para ambas medidas en el la altura baja de pasto. En los valores del tiempo total de pastoreo diario no se encontraron diferencias entre las alturas del pasto en el grupo R y sí en el grupo NR.

[EN] A total of 8 irrigated plots of a reseed sward were used in a factorial design 2x2x2: 2 sward height (3.5 and 5.5 cm), 2 grazing Systems (restricted-R and unrestricted grazing time-NR) and 2 replicates. Five adult sheep lambing single lambs were used per plot for grazing behaviour studies.The body condition score lost were 0.275 and 0.025 units for R and NR groups respectively being the differences statistically significant (P<0.05) only when the sward height was high. The effect of grazing system was significative (P<0.001) for ah grazing behaviour measurements. For the group R the number of bouts was lower (3.4 vs 7.4), the duration of each bout was higher (139.9 vs 87.5 min.), the total daily grazing time was lower (475.8 vs 652.8 min.) and bites rate (bites/min.) was higher (43.4 vs 39.6). The sward height had a significative) P<0.05) effect on grazing time and number of bouts with a lower values in the low sward height group for both paramethers. There was no differences in daily grazing time between sward height groups at R treatment but this effect was significative )P<0.05) at NR group.

5 páginas, 2 tablas.-- Comunicación presentada a la XXXII Reunión Científica de la Sociedad Española para el Estudio de los Pastos (Pamplona, 1 al 5 de junio de 1992).

Peer reviewed

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Spain
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Keywords

Grazing systems, Bites rate, Sistema de pastoreo, Sheep, Ovino, Altura del pasto, Sward height, Ritmo de ingestión

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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