Temporal variation in the chemical composition of Nassella trichotoma under a defoliation gradient
Fluctuations in the chemical composition of invasive species can identify windows where grazing implementation can be maximised for improved weed management. Our goal was to determine the chemical composition of Nassella trichotoma (Nees) Hack. ex Arechav., an aggressive invasive grass species, afte...
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Español |
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CSIRO Publishing
2025
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/24321 https://www.publish.csiro.au/RJ/RJ24029 http://dx.doi.org/10.1071/RJ24029 |
| _version_ | 1855038919010156544 |
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| author | García, Andrés Distel, Roberto Alejandro Loydi, Alejandro |
| author_browse | Distel, Roberto Alejandro García, Andrés Loydi, Alejandro |
| author_facet | García, Andrés Distel, Roberto Alejandro Loydi, Alejandro |
| author_sort | García, Andrés |
| collection | INTA Digital |
| description | Fluctuations in the chemical composition of invasive species can identify windows where grazing implementation can be maximised for improved weed management. Our goal was to determine the chemical composition of Nassella trichotoma (Nees) Hack. ex Arechav., an aggressive invasive grass species, after being subjected to either high or low defoliation across a defoliation intensity gradient and leaves were harvested over the growing season. All samples were analysed for protein content (PC) and neutral detergent fibre (NDF), acid detergent fibre (ADF) and acid detergent lignin (ADL) content. PC was generally higher, and NDF and ADF were higher in defoliated compared with undefoliated plants. An induced anti-herbivore defence may explain the increase in fibre content in response to defoliation, which would accentuate the low nutritional quality of N. trichotoma and, thus, its avoidance by cattle. Therefore, efforts should focus on preventing N. trichotoma leaf tissues from losing nutritional quality by integrating control measures, such as grazing regrowing shoots after disturbances that cause severe defolia-tion (e.g. burning) from early autumn to early spring. This approach could effectively reduce N. trichotoma competitiveness, preventing its persistence and spread. |
| format | info:ar-repo/semantics/artículo |
| id | INTA24321 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Español |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | CSIRO Publishing |
| publisherStr | CSIRO Publishing |
| record_format | dspace |
| spelling | INTA243212025-10-27T10:58:30Z Temporal variation in the chemical composition of Nassella trichotoma under a defoliation gradient García, Andrés Distel, Roberto Alejandro Loydi, Alejandro Malezas Variación Temporal Defoliación Composición Química Pastizales Weeds Temporal Variations Defoliation Chemical Composition Pastures Nassella Trichotoma Fluctuations in the chemical composition of invasive species can identify windows where grazing implementation can be maximised for improved weed management. Our goal was to determine the chemical composition of Nassella trichotoma (Nees) Hack. ex Arechav., an aggressive invasive grass species, after being subjected to either high or low defoliation across a defoliation intensity gradient and leaves were harvested over the growing season. All samples were analysed for protein content (PC) and neutral detergent fibre (NDF), acid detergent fibre (ADF) and acid detergent lignin (ADL) content. PC was generally higher, and NDF and ADF were higher in defoliated compared with undefoliated plants. An induced anti-herbivore defence may explain the increase in fibre content in response to defoliation, which would accentuate the low nutritional quality of N. trichotoma and, thus, its avoidance by cattle. Therefore, efforts should focus on preventing N. trichotoma leaf tissues from losing nutritional quality by integrating control measures, such as grazing regrowing shoots after disturbances that cause severe defolia-tion (e.g. burning) from early autumn to early spring. This approach could effectively reduce N. trichotoma competitiveness, preventing its persistence and spread. EEA Cesáreo Naredo Fil: García, Andrés. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cesáreo Naredo, Agencia de Extensión Rural Coronel Suárez; Argentina Fil: García, Andrés. Kiel University. Institute for Natural Resource Conservation. Department of Landscape Ecology; Alemania Fil: Distel, Roberto Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina Fil: Loydi, Alejandro. Universidad Nacional del Sur. Departamento de Agronomía; Argentina Fil: Loydi, Alejandro. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina 2025-10-27T10:50:12Z 2025-10-27T10:50:12Z 2025-02 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/24321 https://www.publish.csiro.au/RJ/RJ24029 1036-9872 1834-7541 http://dx.doi.org/10.1071/RJ24029 spa info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf CSIRO Publishing Rangeland Journal 47 (2) : 1-6 (2025) |
| spellingShingle | Malezas Variación Temporal Defoliación Composición Química Pastizales Weeds Temporal Variations Defoliation Chemical Composition Pastures Nassella Trichotoma García, Andrés Distel, Roberto Alejandro Loydi, Alejandro Temporal variation in the chemical composition of Nassella trichotoma under a defoliation gradient |
| title | Temporal variation in the chemical composition of Nassella trichotoma under a defoliation gradient |
| title_full | Temporal variation in the chemical composition of Nassella trichotoma under a defoliation gradient |
| title_fullStr | Temporal variation in the chemical composition of Nassella trichotoma under a defoliation gradient |
| title_full_unstemmed | Temporal variation in the chemical composition of Nassella trichotoma under a defoliation gradient |
| title_short | Temporal variation in the chemical composition of Nassella trichotoma under a defoliation gradient |
| title_sort | temporal variation in the chemical composition of nassella trichotoma under a defoliation gradient |
| topic | Malezas Variación Temporal Defoliación Composición Química Pastizales Weeds Temporal Variations Defoliation Chemical Composition Pastures Nassella Trichotoma |
| url | http://hdl.handle.net/20.500.12123/24321 https://www.publish.csiro.au/RJ/RJ24029 http://dx.doi.org/10.1071/RJ24029 |
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