Size/density compensation in Chloris gayana Kunth cv. Fine Cut subjected to different defoliation regimes
The study evaluated the plasticity of Chloris gayana Kunth cv. Fine Cut to defoliation in terms of tiller size/density compensation (SDC). Twelve mini‐swards were grown in a greenhouse under non‐limiting water and nutrient availabilities for 188 d. Four defoliation treatments were applied as a facto...
| Autores principales: | , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Wiley
2019
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/4654 https://onlinelibrary.wiley.com/doi/10.1111/j.1365-2494.2011.00840.x https://doi.org/10.1111/j.1365-2494.2011.00840.x |
| _version_ | 1855483473766121472 |
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| author | Martinez Calsina, Luciana Agnusdei, Monica Graciela Assuero, Silvia Graciela Perez, Hector Eduardo |
| author_browse | Agnusdei, Monica Graciela Assuero, Silvia Graciela Martinez Calsina, Luciana Perez, Hector Eduardo |
| author_facet | Martinez Calsina, Luciana Agnusdei, Monica Graciela Assuero, Silvia Graciela Perez, Hector Eduardo |
| author_sort | Martinez Calsina, Luciana |
| collection | INTA Digital |
| description | The study evaluated the plasticity of Chloris gayana Kunth cv. Fine Cut to defoliation in terms of tiller size/density compensation (SDC). Twelve mini‐swards were grown in a greenhouse under non‐limiting water and nutrient availabilities for 188 d. Four defoliation treatments were applied as a factorial arrangement of two defoliation frequencies and intensities: 80L, 80H, 100L and 100H (80 and 100 denote percentage of photosynthetically active radiation intercepted at defoliation; L and H denote stubble LAIs of 0·6 and 1·75, respectively). Tiller density, demography, dry weight, leaf area and volume were determined over the final 77 d of the experiment. SDC was observed across 80H and both 100 treatments. The estimated slope of the relationship between tiller size and density was close to −5/2, the deviation from the −3/2 line proposed for undefoliated swards being related to changes in LAI and tiller leaf area/volume ratio. The most severe defoliation regime, 80L, resulted in a lower tiller population density relative to the compensation line, suggesting that this defoliation management shifted the species beyond its range of phenotypic plasticity. Cumulative herbage production was significantly reduced in 80L. Despite the similar herbage production of 80H and both 100 treatments, the former was the most favourable defoliation regime for optimizing leafiness and productivity. |
| format | Artículo |
| id | INTA4654 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | INTA46542024-06-03T10:18:22Z Size/density compensation in Chloris gayana Kunth cv. Fine Cut subjected to different defoliation regimes Martinez Calsina, Luciana Agnusdei, Monica Graciela Assuero, Silvia Graciela Perez, Hector Eduardo Chloris Gayana Gramíneas Forrajeras Defoliación Etapas de Desarrollo de la Planta Plasticidad Fenotípica Feed Grasses Defoliation Plant Developmental Stages Phenotypic Plasticity Grama Rhodes Rhodes grass The study evaluated the plasticity of Chloris gayana Kunth cv. Fine Cut to defoliation in terms of tiller size/density compensation (SDC). Twelve mini‐swards were grown in a greenhouse under non‐limiting water and nutrient availabilities for 188 d. Four defoliation treatments were applied as a factorial arrangement of two defoliation frequencies and intensities: 80L, 80H, 100L and 100H (80 and 100 denote percentage of photosynthetically active radiation intercepted at defoliation; L and H denote stubble LAIs of 0·6 and 1·75, respectively). Tiller density, demography, dry weight, leaf area and volume were determined over the final 77 d of the experiment. SDC was observed across 80H and both 100 treatments. The estimated slope of the relationship between tiller size and density was close to −5/2, the deviation from the −3/2 line proposed for undefoliated swards being related to changes in LAI and tiller leaf area/volume ratio. The most severe defoliation regime, 80L, resulted in a lower tiller population density relative to the compensation line, suggesting that this defoliation management shifted the species beyond its range of phenotypic plasticity. Cumulative herbage production was significantly reduced in 80L. Despite the similar herbage production of 80H and both 100 treatments, the former was the most favourable defoliation regime for optimizing leafiness and productivity. EEA Famaillá Fil: Martinez Calsina, Luciana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Famaillá. Campo Experimental Regional Leales; Argentina Fil: Agnusdei, Monica Graciela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina Fil: Assuero, Silvia Graciela. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agriarias; Argentina Fil: Perez, Hector Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentina 2019-03-19T14:00:50Z 2019-03-19T14:00:50Z 2012-06 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/4654 https://onlinelibrary.wiley.com/doi/10.1111/j.1365-2494.2011.00840.x 0142-5242 1365-2494 https://doi.org/10.1111/j.1365-2494.2011.00840.x eng info:eu-repo/semantics/restrictedAccess application/pdf Wiley Grass and Forage Science 67 (2) : 255-262 (June 2012) |
| spellingShingle | Chloris Gayana Gramíneas Forrajeras Defoliación Etapas de Desarrollo de la Planta Plasticidad Fenotípica Feed Grasses Defoliation Plant Developmental Stages Phenotypic Plasticity Grama Rhodes Rhodes grass Martinez Calsina, Luciana Agnusdei, Monica Graciela Assuero, Silvia Graciela Perez, Hector Eduardo Size/density compensation in Chloris gayana Kunth cv. Fine Cut subjected to different defoliation regimes |
| title | Size/density compensation in Chloris gayana Kunth cv. Fine Cut subjected to different defoliation regimes |
| title_full | Size/density compensation in Chloris gayana Kunth cv. Fine Cut subjected to different defoliation regimes |
| title_fullStr | Size/density compensation in Chloris gayana Kunth cv. Fine Cut subjected to different defoliation regimes |
| title_full_unstemmed | Size/density compensation in Chloris gayana Kunth cv. Fine Cut subjected to different defoliation regimes |
| title_short | Size/density compensation in Chloris gayana Kunth cv. Fine Cut subjected to different defoliation regimes |
| title_sort | size density compensation in chloris gayana kunth cv fine cut subjected to different defoliation regimes |
| topic | Chloris Gayana Gramíneas Forrajeras Defoliación Etapas de Desarrollo de la Planta Plasticidad Fenotípica Feed Grasses Defoliation Plant Developmental Stages Phenotypic Plasticity Grama Rhodes Rhodes grass |
| url | http://hdl.handle.net/20.500.12123/4654 https://onlinelibrary.wiley.com/doi/10.1111/j.1365-2494.2011.00840.x https://doi.org/10.1111/j.1365-2494.2011.00840.x |
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