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Biblioteca (s) : |
INIA Treinta y Tres. |
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Fecha : |
11/06/2020 |
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Actualizado : |
22/02/2021 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
DO CARMO, M.; CARDOZO, G.; MECATTI, F.; SOCA, P.; HIRATA, M. |
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Afiliación : |
MARTÍN DO CARMO, Departamento de Sistemas Agrarios y Paisajes Culturales, Centro Universitario de la Región Este, Rocha, Uruguay.; GERONIMO AGUSTIN CARDOZO CABANELAS, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FULVIA MECATTI, Department of Statistics, Università degli Studi di Milano-Bicocca.; PABLO SOCA, Universidad de la República, School of Agronomy, EEMAC.; MASAHIKO HIRATA, Department of Animal and Grassland Sciences, University of Miyazaki. |
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Título : |
Number of samples for accurate visual estimation of mean herbage mass in Campos grasslands. |
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Fecha de publicación : |
2020 |
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Fuente / Imprenta : |
Agronomy Journal, July 2020, Vol. 112(4), p. 2734-2740. Doi: https://doi.org/10.1002/agj2.20237 |
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DOI : |
DOI: 10.1002/agj2.20237 |
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Idioma : |
Inglés |
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Notas : |
Article history: Manuscript received: 23 October 2019. Manuscript revised: 23 March 2020. Manuscript accepted: 01 April 2020. Accepted manuscript online: 09 April 2020. Version of Record online: 19 May 2020. Published July 2020. |
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Contenido : |
The number of samples is a major issue when estimating the mean herbage mass of grazed paddocks. The aim of this study was to assess the number of samples required for accurate visual estimation of mean herbage mass in relation to the herbage mass heterogeneity and size of paddocks. Data were collected across scales of space and time (273 sampling events) from paddocks on Campos grasslands in Uruguay, using the visual estimation technique. The mean herbage mass of the paddocks ranged from 270 to 6350 kg DM ha−1 with coefficient of variation (CV) of 0.13 to 1.26. Twenty-four events representing four levels of herbage mass heterogeneity (CV = 0.3, 0.5, 0.7 and 1.0) × three levels of paddock size (small, 5?13 ha; medium, 41?67 ha; large, 100?140 ha) were chosen (two replicates per group), and analyzed for the probability that the estimation error exceeded 10% of the mean (10% error probability) using the bootstrap technique. The number of samples required for
controlling the 10% error probability below 0.1 increased gradually from 50 to 150 per paddock as the CV increased from 0.3 to 0.7, then sharply to 350 until the CV increased to 1.0, with no effect of paddock size. Taking account of the distribution of CV (< 0.7 in nearly 80% of the events), we propose a general recommendation to take a minimum of 150 samples per paddock for accurate estimation of mean herbage mass in Campos grasslands irrespective of the size of paddocks. |
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Palabras claves : |
ANIMAL PRODUCTION; E-TANIN; ESTIMACION DE BIOMASA; FIELD IMPROVEMENT; LOTUS PEDUNCULATUS; MEJORAMIENTO DE CAMPO; MEJORAMIENTO DE CAMPO NATURAL; PRODUCCIÓN ANIMAL. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 02569naa a2200289 a 4500
001 1061106
005 2021-02-22
008 2020 bl uuuu u00u1 u #d
024 7 $aDOI: 10.1002/agj2.20237$2DOI
100 1 $aDO CARMO, M.
245 $aNumber of samples for accurate visual estimation of mean herbage mass in Campos grasslands.$h[electronic resource]
260 $c2020
500 $aArticle history: Manuscript received: 23 October 2019. Manuscript revised: 23 March 2020. Manuscript accepted: 01 April 2020. Accepted manuscript online: 09 April 2020. Version of Record online: 19 May 2020. Published July 2020.
520 $aThe number of samples is a major issue when estimating the mean herbage mass of grazed paddocks. The aim of this study was to assess the number of samples required for accurate visual estimation of mean herbage mass in relation to the herbage mass heterogeneity and size of paddocks. Data were collected across scales of space and time (273 sampling events) from paddocks on Campos grasslands in Uruguay, using the visual estimation technique. The mean herbage mass of the paddocks ranged from 270 to 6350 kg DM ha−1 with coefficient of variation (CV) of 0.13 to 1.26. Twenty-four events representing four levels of herbage mass heterogeneity (CV = 0.3, 0.5, 0.7 and 1.0) × three levels of paddock size (small, 5?13 ha; medium, 41?67 ha; large, 100?140 ha) were chosen (two replicates per group), and analyzed for the probability that the estimation error exceeded 10% of the mean (10% error probability) using the bootstrap technique. The number of samples required for controlling the 10% error probability below 0.1 increased gradually from 50 to 150 per paddock as the CV increased from 0.3 to 0.7, then sharply to 350 until the CV increased to 1.0, with no effect of paddock size. Taking account of the distribution of CV (< 0.7 in nearly 80% of the events), we propose a general recommendation to take a minimum of 150 samples per paddock for accurate estimation of mean herbage mass in Campos grasslands irrespective of the size of paddocks.
653 $aANIMAL PRODUCTION
653 $aE-TANIN
653 $aESTIMACION DE BIOMASA
653 $aFIELD IMPROVEMENT
653 $aLOTUS PEDUNCULATUS
653 $aMEJORAMIENTO DE CAMPO
653 $aMEJORAMIENTO DE CAMPO NATURAL
653 $aPRODUCCIÓN ANIMAL
700 1 $aCARDOZO, G.
700 1 $aMECATTI, F.
700 1 $aSOCA, P.
700 1 $aHIRATA, M.
773 $tAgronomy Journal, July 2020, Vol. 112(4), p. 2734-2740. Doi: https://doi.org/10.1002/agj2.20237
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INIA Treinta y Tres (TT) |
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Biblioteca (s) : |
INIA Tacuarembó. |
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Fecha actual : |
02/12/2019 |
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Actualizado : |
02/12/2019 |
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Tipo de producción científica : |
Abstracts/Resúmenes |
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Autor : |
PÉREZ, C.; BALMELLI, G.; SIMETO, S.; RAMIREZ, N.; BLANCHETTE, R.; WINGFIELD, M. |
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Afiliación : |
CARLOS PÉREZ, Universidad de la República (UdelaR)/ Facultad de Agronomía; GUSTAVO DANIEL BALMELLI HERNANDEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; SOFIA SIMETO FERRARI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; NAZARET RAMIREZ, Universidad de la República (UdelaR)/ Facultad de Agronomía; ROBERT BLANCHETTE, Department of Planta Pathology, University of Minnesota, Saint Paul, USA; MICHAEL J. WINGFIELD. |
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Título : |
Teratosphaeria leaf diseases: a major threat for eucalypts plantations in Uruguay. |
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Fecha de publicación : |
2019 |
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Fuente / Imprenta : |
In: Pesquisa florestal brasileira = Brazilian journal of forestry research., v. 39, e201902043, Special issue, 2019. Colombo : Embrapa Florestas, 2019. Congreso IUFRO, 25., Curitiba, Brasil, 29 setiembre-05 octubre, 2019. Abstracts. |
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Páginas : |
p. 584 |
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Idioma : |
Inglés |
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Contenido : |
Many Teratosphaeria species are associated with leaf diseases on Eucalyptus spp. (Myrtaceae). However, only a few of these are major pathogens that cause serious losses, particularly to plantation forestry globally. Several species in the Teratosphaeraceae and Mycosphaereaceae species are known to occur in Uruguay where they cause leaf and shoot diseases on Eucalyptus plantations, but most are of minor importance. However, two species have had a serious negative impact on the performance of certain Eucalyptus species. Since its first detection in 2007, Teratosphaeria nubilosa has eliminated Eucalyptus globulus from the available species for pulpwood production. Species substitution has been the main management tool for this pathogen resulting in negative consequences such as limited access to external markets. More recently, in 2011, Teratosphaeria pseudoeucalypti was reported causing leaf blight that has resulted in severe defoliation and death of established Eucalyptus camaldulensis, E. tereticornis, and their hybrids. This pathogen was first described in Australia in 2010 and simultaneously reported in Argentina, Brazil and Uruguay four years later. This disease is a serious threat to Uruguayan plantations and has already imparted a significant social and economic impact in the country where it has damaged urban parks and plantations used for shelter and shade for livestock production. These two examples of serious diseases caused by Teratosphaeria spp. have highlighted that accidentally introduced non-native pathogens can have in a country. They have also raised concerns that such pathogens could threaten the many native Myrtaceae found natural forest ecosystems in Uruguay. MenosMany Teratosphaeria species are associated with leaf diseases on Eucalyptus spp. (Myrtaceae). However, only a few of these are major pathogens that cause serious losses, particularly to plantation forestry globally. Several species in the Teratosphaeraceae and Mycosphaereaceae species are known to occur in Uruguay where they cause leaf and shoot diseases on Eucalyptus plantations, but most are of minor importance. However, two species have had a serious negative impact on the performance of certain Eucalyptus species. Since its first detection in 2007, Teratosphaeria nubilosa has eliminated Eucalyptus globulus from the available species for pulpwood production. Species substitution has been the main management tool for this pathogen resulting in negative consequences such as limited access to external markets. More recently, in 2011, Teratosphaeria pseudoeucalypti was reported causing leaf blight that has resulted in severe defoliation and death of established Eucalyptus camaldulensis, E. tereticornis, and their hybrids. This pathogen was first described in Australia in 2010 and simultaneously reported in Argentina, Brazil and Uruguay four years later. This disease is a serious threat to Uruguayan plantations and has already imparted a significant social and economic impact in the country where it has damaged urban parks and plantations used for shelter and shade for livestock production. These two examples of serious diseases caused by Teratosphaeria spp. have highlighted t... Presentar Todo |
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Palabras claves : |
TERATOSPHAERIA. |
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Thesagro : |
URUGUAY. |
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Asunto categoría : |
K70 Daños al bosque y protección forestal |
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Marc : |
LEADER 02472nam a2200205 a 4500
001 1060491
005 2019-12-02
008 2019 bl uuuu u01u1 u #d
100 1 $aPÉREZ, C.
245 $aTeratosphaeria leaf diseases$ba major threat for eucalypts plantations in Uruguay.$h[electronic resource]
260 $aIn: Pesquisa florestal brasileira = Brazilian journal of forestry research., v. 39, e201902043, Special issue, 2019. Colombo : Embrapa Florestas, 2019. Congreso IUFRO, 25., Curitiba, Brasil, 29 setiembre-05 octubre, 2019. Abstracts.$c2019
300 $ap. 584
520 $aMany Teratosphaeria species are associated with leaf diseases on Eucalyptus spp. (Myrtaceae). However, only a few of these are major pathogens that cause serious losses, particularly to plantation forestry globally. Several species in the Teratosphaeraceae and Mycosphaereaceae species are known to occur in Uruguay where they cause leaf and shoot diseases on Eucalyptus plantations, but most are of minor importance. However, two species have had a serious negative impact on the performance of certain Eucalyptus species. Since its first detection in 2007, Teratosphaeria nubilosa has eliminated Eucalyptus globulus from the available species for pulpwood production. Species substitution has been the main management tool for this pathogen resulting in negative consequences such as limited access to external markets. More recently, in 2011, Teratosphaeria pseudoeucalypti was reported causing leaf blight that has resulted in severe defoliation and death of established Eucalyptus camaldulensis, E. tereticornis, and their hybrids. This pathogen was first described in Australia in 2010 and simultaneously reported in Argentina, Brazil and Uruguay four years later. This disease is a serious threat to Uruguayan plantations and has already imparted a significant social and economic impact in the country where it has damaged urban parks and plantations used for shelter and shade for livestock production. These two examples of serious diseases caused by Teratosphaeria spp. have highlighted that accidentally introduced non-native pathogens can have in a country. They have also raised concerns that such pathogens could threaten the many native Myrtaceae found natural forest ecosystems in Uruguay.
650 $aURUGUAY
653 $aTERATOSPHAERIA
700 1 $aBALMELLI, G.
700 1 $aSIMETO, S.
700 1 $aRAMIREZ, N.
700 1 $aBLANCHETTE, R.
700 1 $aWINGFIELD, M.
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