|
|
Registro completo
|
Biblioteca (s) : |
INIA Tacuarembó. |
Fecha : |
29/04/2015 |
Actualizado : |
16/09/2016 |
Tipo de producción científica : |
Trabajos en Congresos/Conferencias |
Autor : |
DO CARMO, M.; CARDOZO, G.; SOCA, P.M. |
Afiliación : |
MARTIN DO CARMO CORUJO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; GERONIMO AGUSTIN CARDOZO CABANELAS, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; PABLO M. SOCA. |
Título : |
Measurement of campos rangelands herbage mass by simple methods. [Resumen]. |
Fecha de publicación : |
2015 |
Fuente / Imprenta : |
ANNUAL MEETING OF THE SOCIETY FOR RANGE MANAGEMENT, SRM, 68., Sacramento, USA, 2015. |
Idioma : |
Inglés |
Contenido : |
Accurate and precise estimation of herbage mass is essential for livestock management, because herbage allowance depends on it estimation. Difficulties in estimation arise because of great variability in herbage mass in grassland and rangeland situations. Measuring yield directly by cutting is costly and destructive; but herbage height is highly correlated with herbage mass, thus could be a substitute of the cutting. Based on measurement of herbage mass in a large experiment (EEBR) and in four farms across Uruguay (MICN), we analyzed the relationship between herbage height and dry weight of the quadrat in kg/ha. Analysis was performed
with PROC MIXED and PROC CORR of SAS. On the other hand, the sample size to be taken in each paddock is of great importance and was estimated from the data population described above by resampling and estimating the coefficient of variation (CV) between means. A CV of 10% was defined as the limit to consider the estimation precise enough. The general relationship was y = 224 (±36) + x * 339 (±4), R2 = 0.84. Sample size to maintain the average with a CV error below 10% varied with mean, because it change the variance, however as a general rule, with a sample size between 60 to 100 only one estimation from 198, was above 10% error of the mean. We conclude that estimations based on herbage height are accurate enough (R2 = 0.84) to estimate the herbage mass and a sample size from
60 to 100, give as confidence to estimate herbage mass with precision in paddocks from 5 to 190 ha. That methodology should be extended to Campos rangeland manager for decision making to control grazing intensity. MenosAccurate and precise estimation of herbage mass is essential for livestock management, because herbage allowance depends on it estimation. Difficulties in estimation arise because of great variability in herbage mass in grassland and rangeland situations. Measuring yield directly by cutting is costly and destructive; but herbage height is highly correlated with herbage mass, thus could be a substitute of the cutting. Based on measurement of herbage mass in a large experiment (EEBR) and in four farms across Uruguay (MICN), we analyzed the relationship between herbage height and dry weight of the quadrat in kg/ha. Analysis was performed
with PROC MIXED and PROC CORR of SAS. On the other hand, the sample size to be taken in each paddock is of great importance and was estimated from the data population described above by resampling and estimating the coefficient of variation (CV) between means. A CV of 10% was defined as the limit to consider the estimation precise enough. The general relationship was y = 224 (±36) + x * 339 (±4), R2 = 0.84. Sample size to maintain the average with a CV error below 10% varied with mean, because it change the variance, however as a general rule, with a sample size between 60 to 100 only one estimation from 198, was above 10% error of the mean. We conclude that estimations based on herbage height are accurate enough (R2 = 0.84) to estimate the herbage mass and a sample size from
60 to 100, give as confidence to estimate herbage mass with precisi... Presentar Todo |
Thesagro : |
FORRAJES; PASTURAS. |
Asunto categoría : |
A50 Investigación agraria |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/4400/1/DO-CARMO-2015-AINFO.pdf
http://www.rangelands.org/events/
|
Marc : |
LEADER 02135nam a2200157 a 4500 001 1052580 005 2016-09-16 008 2015 bl uuuu u01u1 u #d 100 1 $aDO CARMO, M. 245 $aMeasurement of campos rangelands herbage mass by simple methods. [Resumen].$h[electronic resource] 260 $aANNUAL MEETING OF THE SOCIETY FOR RANGE MANAGEMENT, SRM, 68., Sacramento, USA$c2015 520 $aAccurate and precise estimation of herbage mass is essential for livestock management, because herbage allowance depends on it estimation. Difficulties in estimation arise because of great variability in herbage mass in grassland and rangeland situations. Measuring yield directly by cutting is costly and destructive; but herbage height is highly correlated with herbage mass, thus could be a substitute of the cutting. Based on measurement of herbage mass in a large experiment (EEBR) and in four farms across Uruguay (MICN), we analyzed the relationship between herbage height and dry weight of the quadrat in kg/ha. Analysis was performed with PROC MIXED and PROC CORR of SAS. On the other hand, the sample size to be taken in each paddock is of great importance and was estimated from the data population described above by resampling and estimating the coefficient of variation (CV) between means. A CV of 10% was defined as the limit to consider the estimation precise enough. The general relationship was y = 224 (±36) + x * 339 (±4), R2 = 0.84. Sample size to maintain the average with a CV error below 10% varied with mean, because it change the variance, however as a general rule, with a sample size between 60 to 100 only one estimation from 198, was above 10% error of the mean. We conclude that estimations based on herbage height are accurate enough (R2 = 0.84) to estimate the herbage mass and a sample size from 60 to 100, give as confidence to estimate herbage mass with precision in paddocks from 5 to 190 ha. That methodology should be extended to Campos rangeland manager for decision making to control grazing intensity. 650 $aFORRAJES 650 $aPASTURAS 700 1 $aCARDOZO, G. 700 1 $aSOCA, P.M.
Descargar
Esconder MarcPresentar Marc Completo |
Registro original : |
INIA Tacuarembó (TBO) |
|
Biblioteca
|
Identificación
|
Origen
|
Tipo / Formato
|
Clasificación
|
Cutter
|
Registro
|
Volumen
|
Estado
|
Volver
|
|
Registro completo
|
Biblioteca (s) : |
INIA Tacuarembó. |
Fecha actual : |
21/02/2014 |
Actualizado : |
27/02/2018 |
Tipo de producción científica : |
Capítulo en Libro Técnico-Científico |
Autor : |
CARRIQUIRY, M.; VIÑOLES, C.; ASTESSIANO, A.L.; MEIKLE, A. |
Afiliación : |
MARIANA CARRIQUIRY; CAROLINA VIÑOLES GIL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; A. L. ASTESSIANO; A. MEIKLE. |
Título : |
Características foliculares y expresión uterina en vacas de carne puras y cruzas pastoreando dos asignaciones de forreje de campo natural |
Fecha de publicación : |
2013 |
Fuente / Imprenta : |
In: CARRIQUIRY, M. (Dir.). Metabolismo de la vaca de carne y su cría en pastoreo de campo nativo: un enfoque endócrino-molecular. Montevideo (UY): INIA, 2013. |
Páginas : |
p. 41-46 |
Serie : |
(Serie FPTA-INIA; 43) |
Idioma : |
Español |
Notas : |
Proyecto FPTA 262: Evaluación de la variación de la oferta de forraje del campo natural, del grupo genético y de la suplementación preparto sobre la respuesta productiva-reproductiva de la vaca de carne y su cría, Período de Ejecución: Ene.2009-Dic.2011 |
Thesagro : |
NUTRICION; REPRODUCION; VACA. |
Asunto categoría : |
-- |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/8816/1/Fpta-43-p.41-46.pdf
|
Marc : |
LEADER 01011naa a2200217 a 4500 001 1021806 005 2018-02-27 008 2013 bl uuuu u00u1 u #d 100 1 $aCARRIQUIRY, M. 245 $aCaracterísticas foliculares y expresión uterina en vacas de carne puras y cruzas pastoreando dos asignaciones de forreje de campo natural 260 $c2013 300 $ap. 41-46 490 $a(Serie FPTA-INIA; 43) 500 $aProyecto FPTA 262: Evaluación de la variación de la oferta de forraje del campo natural, del grupo genético y de la suplementación preparto sobre la respuesta productiva-reproductiva de la vaca de carne y su cría, Período de Ejecución: Ene.2009-Dic.2011 650 $aNUTRICION 650 $aREPRODUCION 650 $aVACA 700 1 $aVIÑOLES, C. 700 1 $aASTESSIANO, A.L. 700 1 $aMEIKLE, A. 773 $tIn: CARRIQUIRY, M. (Dir.). Metabolismo de la vaca de carne y su cría en pastoreo de campo nativo: un enfoque endócrino-molecular. Montevideo (UY): INIA, 2013.
Descargar
Esconder MarcPresentar Marc Completo |
Registro original : |
INIA Tacuarembó (TBO) |
|
No copia registrada de este documento.
|
Volver
|
Expresión de búsqueda válido. Check! |
|
|