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	Provedor de dados Phyton (1) Autor Becker,G (1) Busso,CA (1) Ghermandi,L (1) Gittins,C (1) Siffredi,G (1) Palavra-chave Aerial dry weight (1) Defoliation frequency (1) Perennial grasses (1) Poa ligularis (1) Root dynamics (1) Total non-structural carbohydrates (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Ano 2010 (1) País Argentina (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Defoliation frequency affects morphophysiological traits in the bunchgrass Poa ligularis Phyton Gittins,C; Busso,CA; Becker,G; Ghermandi,L; Siffredi,G. Poa ligularis is an important forage in Patagonian rangelands. Populations of this perennial bunchgrass have been severely affected by overgrazing. We propose that increased defoliation frequencies will decrease (1) aerial- and belowground dry matter production, (2) root survival, and (3) concentration and content of total non-structural crown + root carbohydrates, and (4) increase root mortality. Five defoliation frequencies (plus 1 control) were applied in a representative grassland of the Occidental District in Patagonia during two consecutive growing seasons. All four hypotheses were rejected. Aerial and belowground dry matter production increased from one to two or three defoliations. Root production and dynamics were not affected by the study... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aerial dry weight; Defoliation frequency; Perennial grasses; Poa ligularis; Root dynamics; Total non-structural carbohydrates. Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000100009 Registros recuperados: 1 Primeira ... 1 ... Última

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