Developing a prescription for brush control in the Chaco region, effects of combined treatments on the canopy of three native shrub species
Shrub encroachment is frequent in grazing lands in the Chaco region, Argentina. Fire is used by cattlemen to reduce the dominance of the shrub stands, improve forage standing biomass and quality, and enhance grazing accessibility. In this research, we assessed the combined effect of roller chopping ...
| Main Authors: | , , , , , , |
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| Format: | Artículo |
| Language: | Inglés |
| Published: |
Taylor & Francis
2022
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.12123/11501 https://www.tandfonline.com/doi/full/10.1080/15324982.2018.1430072 https://doi.org/10.1080/15324982.2018.1430072 |
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| author | Ledesma, Roxana Ramona Kunst, Carlos Roberto Bravo, Sandra Leiva, Marta Lorea, Luciano Godoy, Jose Alberto Navarrete, Victor Del Carmen |
| author_browse | Bravo, Sandra Godoy, Jose Alberto Kunst, Carlos Roberto Ledesma, Roxana Ramona Leiva, Marta Lorea, Luciano Navarrete, Victor Del Carmen |
| author_facet | Ledesma, Roxana Ramona Kunst, Carlos Roberto Bravo, Sandra Leiva, Marta Lorea, Luciano Godoy, Jose Alberto Navarrete, Victor Del Carmen |
| author_sort | Ledesma, Roxana Ramona |
| collection | INTA Digital |
| description | Shrub encroachment is frequent in grazing lands in the Chaco region, Argentina. Fire is used by cattlemen to reduce the dominance of the shrub stands, improve forage standing biomass and quality, and enhance grazing accessibility. In this research, we assessed the combined effect of roller chopping + fire on the plant canopy of three native shrub species, Acacia gilliessi, Celtis ehrenbergiana, and Schinus bumelioides. We used a randomized design, with three factors, year, burn dates, and fine fuel load. Before the burn, the area received a roller-chopping treatment. Canopy volume reduction was assessed using, DifV = −1*(Vi − Va) and DifS = −1*(Si − Sa), respectively, where V = plant volume and S = sprout number. Suffixes i and a represent measurements taken before the roller-chopping treatment and one growth season after the fire, respectively. Fire intensity, headfire residence time, woody residues, and initial plant volume were evaluated as covariates. Results indicate a negative fire effect on canopy volume and sprouting. A. gilliesi was more susceptible to fire than the other two species. High fine fuel load and high fire intensity generated a severe effect on sprout number. The same trend was observed for coarse fuels. The canopy volume reduction was greater in A. gilliesi than the other species, reaffirming its high susceptibility to fire. Head fires were faster in 2009 than in 2008 and in the late than in the early burn dates. These results suggest that mechanical + fire treatments can be useful management tools for controlling shrub encroachment in the western Chaco. |
| format | Artículo |
| id | INTA11501 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Taylor & Francis |
| publisherStr | Taylor & Francis |
| record_format | dspace |
| spelling | INTA115012022-04-05T13:06:31Z Developing a prescription for brush control in the Chaco region, effects of combined treatments on the canopy of three native shrub species Ledesma, Roxana Ramona Kunst, Carlos Roberto Bravo, Sandra Leiva, Marta Lorea, Luciano Godoy, Jose Alberto Navarrete, Victor Del Carmen Arbustos Control de Malezas Leñosas Cubierta de Copas Incendios Shrubs Brush Control Canopy Fires Región Chaqueña Shrub encroachment is frequent in grazing lands in the Chaco region, Argentina. Fire is used by cattlemen to reduce the dominance of the shrub stands, improve forage standing biomass and quality, and enhance grazing accessibility. In this research, we assessed the combined effect of roller chopping + fire on the plant canopy of three native shrub species, Acacia gilliessi, Celtis ehrenbergiana, and Schinus bumelioides. We used a randomized design, with three factors, year, burn dates, and fine fuel load. Before the burn, the area received a roller-chopping treatment. Canopy volume reduction was assessed using, DifV = −1*(Vi − Va) and DifS = −1*(Si − Sa), respectively, where V = plant volume and S = sprout number. Suffixes i and a represent measurements taken before the roller-chopping treatment and one growth season after the fire, respectively. Fire intensity, headfire residence time, woody residues, and initial plant volume were evaluated as covariates. Results indicate a negative fire effect on canopy volume and sprouting. A. gilliesi was more susceptible to fire than the other two species. High fine fuel load and high fire intensity generated a severe effect on sprout number. The same trend was observed for coarse fuels. The canopy volume reduction was greater in A. gilliesi than the other species, reaffirming its high susceptibility to fire. Head fires were faster in 2009 than in 2008 and in the late than in the early burn dates. These results suggest that mechanical + fire treatments can be useful management tools for controlling shrub encroachment in the western Chaco. EEA Santiago del Estero Fil: Ledesma, Roxana Ramona. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina Fil: Kunst, Carlos Roberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina Fil: Bravo, Sandra. Universidad Nacional de Santiago del Estero. Facultad de Ciencias Forestales; Argentina Fil: Leiva, Marta. Universidad Nacional de Santiago del Estero. Facultad de Ciencias Forestales; Argentina Fil: Lorea, Luciano. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina Fil: Godoy, Jose Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina Fil: Navarrete, Victor Del Carmen. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina 2022-03-29T11:14:52Z 2022-03-29T11:14:52Z 2018 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/11501 https://www.tandfonline.com/doi/full/10.1080/15324982.2018.1430072 1532-4982 1532-4990 https://doi.org/10.1080/15324982.2018.1430072 eng info:eu-repo/semantics/restrictedAccess application/pdf Taylor & Francis Arid Land Research and Management 32 (3) : 1-16 (2018) |
| spellingShingle | Arbustos Control de Malezas Leñosas Cubierta de Copas Incendios Shrubs Brush Control Canopy Fires Región Chaqueña Ledesma, Roxana Ramona Kunst, Carlos Roberto Bravo, Sandra Leiva, Marta Lorea, Luciano Godoy, Jose Alberto Navarrete, Victor Del Carmen Developing a prescription for brush control in the Chaco region, effects of combined treatments on the canopy of three native shrub species |
| title | Developing a prescription for brush control in the Chaco region, effects of combined treatments on the canopy of three native shrub species |
| title_full | Developing a prescription for brush control in the Chaco region, effects of combined treatments on the canopy of three native shrub species |
| title_fullStr | Developing a prescription for brush control in the Chaco region, effects of combined treatments on the canopy of three native shrub species |
| title_full_unstemmed | Developing a prescription for brush control in the Chaco region, effects of combined treatments on the canopy of three native shrub species |
| title_short | Developing a prescription for brush control in the Chaco region, effects of combined treatments on the canopy of three native shrub species |
| title_sort | developing a prescription for brush control in the chaco region effects of combined treatments on the canopy of three native shrub species |
| topic | Arbustos Control de Malezas Leñosas Cubierta de Copas Incendios Shrubs Brush Control Canopy Fires Región Chaqueña |
| url | http://hdl.handle.net/20.500.12123/11501 https://www.tandfonline.com/doi/full/10.1080/15324982.2018.1430072 https://doi.org/10.1080/15324982.2018.1430072 |
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