Herbage Allowance, Production and Composition of a Lolium Perenne Pasture
For a better understanding of the consequences of the application of different grazing intensities, functions of response of composition and forage production of a pasture of Lolium perenne under different grazing herbage allowance levels (OF) were developed, and their structural characteristics were analysed with a multivariate method. The OF evaluated were 2.0- 4.5-7.0 and 9.5 DM kg/100 kg of animal liveweight/day. The relationships between forage production and relative forage utilization with the OF were lineal: forage production (DM kg/ha)=3619+1078OF, (P<0.0038; r2 =0.74); forage utilization (percentage )=88.8- 3.86OF, (P <0.0066; r2 =0.69), but no differences were detected in the disappeared forage. The relationship between pre-graze aerial biomass and foliage height (cm) for the entire period was: aerial biomass (DM kg/ha) = -758 + 237x (P <0.0001; r2 = 0.79), for x=height (cm). The pre-graze green leaves biomass was lineally affected (P <0.01; r2 =0.70) by the remainder green leaves biomass post-graze and by tillers density (P <0.0001; r2 =0.67). Principal component analysis indicated that, under these conditions, only the biggest OF evaluated maintained the values of variables relatively high, suggesting a highest pasture productivity and stability under these treatments. The relationships achieved are useful for pasture management, although the environmental conditions changed during the experimental period, the grazing frequency was higher than the recommended and some tillers began to reproductive state.
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Coeditada entre Facultad de Agronomía - Udelar y el Instituto Nacional de Investigación Agropecuaria (INIA)
2012
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Saldanha, Sylvia Boggiano, Pablo Cadenazzi, Mónica |
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Saldanha, Sylvia Boggiano, Pablo Cadenazzi, Mónica Herbage Allowance, Production and Composition of a Lolium Perenne Pasture |
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Saldanha, Sylvia Boggiano, Pablo Cadenazzi, Mónica |
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Saldanha, Sylvia |
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Herbage Allowance, Production and Composition of a Lolium Perenne Pasture |
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Herbage Allowance, Production and Composition of a Lolium Perenne Pasture |
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Herbage Allowance, Production and Composition of a Lolium Perenne Pasture |
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Herbage Allowance, Production and Composition of a Lolium Perenne Pasture |
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Herbage Allowance, Production and Composition of a Lolium Perenne Pasture |
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herbage allowance, production and composition of a lolium perenne pasture |
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For a better understanding of the consequences of the application of different grazing intensities, functions of response of composition and forage production of a pasture of Lolium perenne under different grazing herbage allowance levels (OF) were developed, and their structural characteristics were analysed with a multivariate method. The OF evaluated were 2.0- 4.5-7.0 and 9.5 DM kg/100 kg of animal liveweight/day. The relationships between forage production and relative forage utilization with the OF were lineal: forage production (DM kg/ha)=3619+1078OF, (P<0.0038; r2 =0.74); forage utilization (percentage )=88.8- 3.86OF, (P <0.0066; r2 =0.69), but no differences were detected in the disappeared forage. The relationship between pre-graze aerial biomass and foliage height (cm) for the entire period was: aerial biomass (DM kg/ha) = -758 + 237x (P <0.0001; r2 = 0.79), for x=height (cm). The pre-graze green leaves biomass was lineally affected (P <0.01; r2 =0.70) by the remainder green leaves biomass post-graze and by tillers density (P <0.0001; r2 =0.67). Principal component analysis indicated that, under these conditions, only the biggest OF evaluated maintained the values of variables relatively high, suggesting a highest pasture productivity and stability under these treatments. The relationships achieved are useful for pasture management, although the environmental conditions changed during the experimental period, the grazing frequency was higher than the recommended and some tillers began to reproductive state. |
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Coeditada entre Facultad de Agronomía - Udelar y el Instituto Nacional de Investigación Agropecuaria (INIA) |
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2012 |
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AT saldanhasylvia herbageallowanceproductionandcompositionofaloliumperennepasture AT boggianopablo herbageallowanceproductionandcompositionofaloliumperennepasture AT cadenazzimonica herbageallowanceproductionandcompositionofaloliumperennepasture AT saldanhasylvia ofertadeforrajeproduccionycomposiciondeunapasturadeloliumperenne AT boggianopablo ofertadeforrajeproduccionycomposiciondeunapasturadeloliumperenne AT cadenazzimonica ofertadeforrajeproduccionycomposiciondeunapasturadeloliumperenne |
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oai:oai.agrocienciauruguay.uy:article-5812023-12-27T16:24:05Z Herbage Allowance, Production and Composition of a Lolium Perenne Pasture Oferta de forraje, producción y composición de una pastura de Lolium perenne Saldanha, Sylvia Boggiano, Pablo Cadenazzi, Mónica perennial ryegrass grazing intensity leaves biomass For a better understanding of the consequences of the application of different grazing intensities, functions of response of composition and forage production of a pasture of Lolium perenne under different grazing herbage allowance levels (OF) were developed, and their structural characteristics were analysed with a multivariate method. The OF evaluated were 2.0- 4.5-7.0 and 9.5 DM kg/100 kg of animal liveweight/day. The relationships between forage production and relative forage utilization with the OF were lineal: forage production (DM kg/ha)=3619+1078OF, (P<0.0038; r2 =0.74); forage utilization (percentage )=88.8- 3.86OF, (P <0.0066; r2 =0.69), but no differences were detected in the disappeared forage. The relationship between pre-graze aerial biomass and foliage height (cm) for the entire period was: aerial biomass (DM kg/ha) = -758 + 237x (P <0.0001; r2 = 0.79), for x=height (cm). The pre-graze green leaves biomass was lineally affected (P <0.01; r2 =0.70) by the remainder green leaves biomass post-graze and by tillers density (P <0.0001; r2 =0.67). Principal component analysis indicated that, under these conditions, only the biggest OF evaluated maintained the values of variables relatively high, suggesting a highest pasture productivity and stability under these treatments. The relationships achieved are useful for pasture management, although the environmental conditions changed during the experimental period, the grazing frequency was higher than the recommended and some tillers began to reproductive state. Para comprender mejor las consecuencias de la aplicación de diferentes intensidades de pastoreo, se desarrollaron funciones de respuesta de la producción y composición del forraje de una pastura de Lolium perenne a ofertas de forraje (OF) y se analizaron en forma multivariada las características estructurales. Las OF evaluadas fueron 2,0- 4,5-7,0 y 9,5 kg MS/100 kg de peso vivo animal/día. Las relaciones entre producción de forraje y utilización relativa del forraje con las OF fueron lineales: producción de forraje (kg MS/ha) = 3619+1078OF (P<0,0038; r2 =0,74); utilización del forraje (porcentaje) = 88,8-3,86OF (P><0,0066; r2 =0,69), no detectándose diferencias en el forraje desaparecido. La relación de la OF de la biomasa aérea pre pastoreo y la altura del follaje para todo el período fue: biomasa aérea (kg MS/ha) = -758+237x, (P><0,0001; r2 =0,79) siendo x = altura (cm). La biomasa de láminas prepastoreo fue afectada linealmente (P><0,01; r2 =0,70) por la biomasa de láminas verdes remanentes del pastoreo anterior y por la densidad de macollos (P><0,0001; r2 =0,67). El análisis de componentes principales indicó que bajo esas condiciones, únicamente la mayor OF evaluada mantenía los valores de las variables relativamente altos, sugiriendo así una mayor productividad y estabilidad de la pastura bajo este manejo. Las relaciones obtenidas se consideran útiles para el manejo de las pasturas, a pesar de que las condiciones ambientales variaron durante el período de medición, la frecuencia del pastoreo fue mayor a la recomendada y algunos macollos pasaron al estado reproductivo. Coeditada entre Facultad de Agronomía - Udelar y el Instituto Nacional de Investigación Agropecuaria (INIA) 2012-06-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://agrocienciauruguay.uy/index.php/agrociencia/article/view/581 10.31285/AGRO.16.581 Agrociencia Uruguay; Vol. 16 No. 1 (2012); 150- 159 Agrociencia Uruguay; Vol. 16 Núm. 1 (2012); 150- 159 Agrociencia Uruguay; v. 16 n. 1 (2012); 150- 159 2730-5066 spa https://agrocienciauruguay.uy/index.php/agrociencia/article/view/581/603 Copyright (c) 2021 Agrociencia Uruguay https://creativecommons.org/licenses/by/4.0 |