Persistence of tall fescue in a subtropical environment : tiller survival over summer in response to flowering control and nitrogen supply
Enhancing pasture persistence is crucial to achieve more sustainable grass-based animal production systems. Although it is known that persistence of perennial ryegrass is based on a high turnover of tillers during late spring and summer, little is known about other forage species, particularly in su...
| Autores principales: | , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2017
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/884 http://onlinelibrary.wiley.com/doi/10.1111/gfs.12252/abstract https://doi.org/10.1111/gfs.12252 |
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| author | Jauregui, José Martín Michelini, D F. Agnusdei, Monica Graciela Sevilla, Gabriel Hipolito Chilibroste, Pablo Lattanzi, F.A. Baudracco, Javier |
| author_browse | Agnusdei, Monica Graciela Baudracco, Javier Chilibroste, Pablo Jauregui, José Martín Lattanzi, F.A. Michelini, D F. Sevilla, Gabriel Hipolito |
| author_facet | Jauregui, José Martín Michelini, D F. Agnusdei, Monica Graciela Sevilla, Gabriel Hipolito Chilibroste, Pablo Lattanzi, F.A. Baudracco, Javier |
| author_sort | Jauregui, José Martín |
| collection | INTA Digital |
| description | Enhancing pasture persistence is crucial to achieve more sustainable grass-based animal production systems. Although it is known that persistence of perennial ryegrass is based on a high turnover of tillers during late spring and summer, little is known about other forage species, particularly in subtropical climates. To address this question, this study evaluated survival of grazed tall fescue tillers growing in a subtropical climate. We hypothesized that hard tactical grazing during winter to remove reproductive stems (designated as ‘flowering control’), and nitrogen fertilization in spring, would both improve tiller survival over summer, and thus enhance tiller density. This was assessed in two experiments. In both experiments, few tillers appeared during late spring and summer and so tiller density depended on the dynamics of vegetative tillers present in the sward in spring. In Experiment 2, flowering control and nitrogen fertilization both enhanced the survival of that critical tiller cohort, but the effects were not additive. Responses were similar but not statistically significant in Experiment 1, which had a warmer, drier summer and lower overall survival rates. Unlike grasses in temperate environments, persistence of tall fescue in this subtropical site appeared to follow a ‘vegetative pathway’; i.e., new tillers were produced largely in autumn, from vegetative tillers that survived the summer. |
| format | Artículo |
| id | INTA884 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | INTA8842022-02-22T15:32:36Z Persistence of tall fescue in a subtropical environment : tiller survival over summer in response to flowering control and nitrogen supply Jauregui, José Martín Michelini, D F. Agnusdei, Monica Graciela Sevilla, Gabriel Hipolito Chilibroste, Pablo Lattanzi, F.A. Baudracco, Javier Festuca arundinacea Nitrógeno Nitrogen Verano Pastizales Macollamiento Summer Pastures Tillering Festuca Alta Enhancing pasture persistence is crucial to achieve more sustainable grass-based animal production systems. Although it is known that persistence of perennial ryegrass is based on a high turnover of tillers during late spring and summer, little is known about other forage species, particularly in subtropical climates. To address this question, this study evaluated survival of grazed tall fescue tillers growing in a subtropical climate. We hypothesized that hard tactical grazing during winter to remove reproductive stems (designated as ‘flowering control’), and nitrogen fertilization in spring, would both improve tiller survival over summer, and thus enhance tiller density. This was assessed in two experiments. In both experiments, few tillers appeared during late spring and summer and so tiller density depended on the dynamics of vegetative tillers present in the sward in spring. In Experiment 2, flowering control and nitrogen fertilization both enhanced the survival of that critical tiller cohort, but the effects were not additive. Responses were similar but not statistically significant in Experiment 1, which had a warmer, drier summer and lower overall survival rates. Unlike grasses in temperate environments, persistence of tall fescue in this subtropical site appeared to follow a ‘vegetative pathway’; i.e., new tillers were produced largely in autumn, from vegetative tillers that survived the summer. EEA Concepción del Uruguay Fil: Jauregui, José Martín. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina Fil: Michelini, D F. Universidad de la República, Centro Universitario Región Litoral Norte; Uruguay Fil: Agnusdei, Monica Graciela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina Fil: Sevilla, Gabriel Hipolito. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; Argentina Fil: Chilibroste, Pablo. Universidad de la República, Estación Experimental Dr. Mario A. Cassinoni; Uruguay Fil: Lattanzi, F.A. Instituto Nacional de Investigación Agropecuaria. Estación Experimental La Estanzuela; Uruguay Fil: Baudracco, Javier. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fil: Baudracco, Javier. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina 2017-08-02T14:14:37Z 2017-08-02T14:14:37Z 2016 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/submittedVersion http://hdl.handle.net/20.500.12123/884 http://onlinelibrary.wiley.com/doi/10.1111/gfs.12252/abstract 1365-2494 https://doi.org/10.1111/gfs.12252 eng info:eu-repo/semantics/restrictedAccess application/pdf Wiley Grass and forage science 72 (3) : 454-466. (September 2017) |
| spellingShingle | Festuca arundinacea Nitrógeno Nitrogen Verano Pastizales Macollamiento Summer Pastures Tillering Festuca Alta Jauregui, José Martín Michelini, D F. Agnusdei, Monica Graciela Sevilla, Gabriel Hipolito Chilibroste, Pablo Lattanzi, F.A. Baudracco, Javier Persistence of tall fescue in a subtropical environment : tiller survival over summer in response to flowering control and nitrogen supply |
| title | Persistence of tall fescue in a subtropical environment : tiller survival over summer in response to flowering control and nitrogen supply |
| title_full | Persistence of tall fescue in a subtropical environment : tiller survival over summer in response to flowering control and nitrogen supply |
| title_fullStr | Persistence of tall fescue in a subtropical environment : tiller survival over summer in response to flowering control and nitrogen supply |
| title_full_unstemmed | Persistence of tall fescue in a subtropical environment : tiller survival over summer in response to flowering control and nitrogen supply |
| title_short | Persistence of tall fescue in a subtropical environment : tiller survival over summer in response to flowering control and nitrogen supply |
| title_sort | persistence of tall fescue in a subtropical environment tiller survival over summer in response to flowering control and nitrogen supply |
| topic | Festuca arundinacea Nitrógeno Nitrogen Verano Pastizales Macollamiento Summer Pastures Tillering Festuca Alta |
| url | http://hdl.handle.net/20.500.12123/884 http://onlinelibrary.wiley.com/doi/10.1111/gfs.12252/abstract https://doi.org/10.1111/gfs.12252 |
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