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Ecología Austral
Article . 2014 . Peer-reviewed
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Ecología Austral
Article
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Ecología Austral
Article . 2014
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Experiencias de largo plazo para el manejo de una hierba invasora de pastizales: El caso de Hieracium pilosella L. en la Estepa Fueguina

Authors: Cipriotti, P. A.; Collantes, M. B.; Escartín, C.; Cabeza, S.; Rauber, R. B.; Braun, K.;

Experiencias de largo plazo para el manejo de una hierba invasora de pastizales: El caso de Hieracium pilosella L. en la Estepa Fueguina

Abstract

Ecología Austral 24:135-144 (2014) Las experiencias de largo plazo son poco frecuentes en los estudios sobre manejo de especies invasoras y resultan claves para comprender la efectividad de los controles. En este trabajo, revisitamos un experimento instalado hace más de siete años, para evaluar diferentes alternativas de control (inter-siembra de pasturas, fertilizaciones y aplicación de herbicidas selectivos y no selectivos) bajo dos condiciones de pastoreo (con y sin pastoreo) en pastizales de Tierra del Fuego invadidos por la maleza exótica Hieracium pilosella L. (velosilla, Asteraceae). Con el fin de evaluar los efectos de los tratamientos aplicados hace siete años, se midió la cobertura de la especie invasora, de las formas de vida dominantes y del suelo desnudo. Los efectos de la fertilización dependieron de las condiciones de pastoreo; la cobertura de H. pilosella luego de siete años disminuyó en más de un 82% y fue reemplazada por otras hierbas (mayormente especies naturalizadas y de valor forrajero) en las parcelas fertilizadas y sin pastoreo doméstico, mientras que no hubo cambios en las parcelas fertilizadas y pastoreadas. Por otro lado, ambos herbicidas (selectivos y no selectivos) redujeron la cobertura de H. pilosella en ca. 90% luego de siete años, independientemente del pastoreo. Sin embargo, la aplicación del herbicida no selectivo determinó un aumento de la cobertura de suelo desnudo de hasta un 15%. Con la aplicación del herbicida selectivo, por el contrario, la cobertura de graminoides aumentó hasta casi un 60% y la cobertura de suelo descubierto se mantuvo por debajo del 2%. Estos resultados permiten sugerir que una estrategia de control basada en la aplicación local de herbicidas selectivos y/o fertilizaciones con exclusiones temporarias del ganado ovino reduce la cobertura de la maleza invasora a escala local y a mediano plazo.

Country
Argentina
Keywords

Hieracium pilosella, PASTURAS, 610, Invasive Species, PASTURES, DISTURBIOS, INVASIONS, Malezas, Grassland Management, INVASIONES, CONTROL QUIMICO, Tierra del Fuego, GE1-350, QH540-549.5, GRAZING MANAGEMENT, Ecology, Pastures, PASTIZALES, Pastizales, RANGELANDS, Environmental sciences, PASTOREO OVINO, CHEMICAL CONTROL, Manejo de Praderas, DISTURBANCES, Weeds, Especie Invasiva, GRASSLANDS, SHEEP GRAZING, Estepa Fueguina, MANEJO DEL PASTOREO

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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.
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    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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selected citations
These citations are derived from selected sources.
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).
BIP!Citations provided by BIP!
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).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
3
Average
Average
Average
Green
gold