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Artículo

Temporal variation in the chemical composition of Nassella trichotoma under a defoliation gradient

García, AndrésIcon ; Distel, Roberto AlejandroIcon ; Loydi, AlejandroIcon
Fecha de publicación: 18/02/2025
Editorial: Csiro Publishing
Revista: Rangeland Journal
ISSN: 1036-9872
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente

Resumen

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.
Palabras clave: Anti-herbivore defence , Austral Pampa , Fibre content , Growing season , Nutritional quality , Protein content , Serrated tussock , Weed expansion , Weed invasion
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/263266
URL: https://www.publish.csiro.au/RJ/RJ24029
DOI: http://dx.doi.org/10.1071/RJ24029
Colecciones
Articulos(CERZOS)
Articulos de CENTRO REC.NAT.RENOVABLES DE ZONA SEMIARIDA(I)
Citación
García, Andrés; Distel, Roberto Alejandro; Loydi, Alejandro; Temporal variation in the chemical composition of Nassella trichotoma under a defoliation gradient; Csiro Publishing; Rangeland Journal; 47; 2; 18-2-2025; 1-6
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