Biological Fixation of N2 in Mono and Polyspecific Legume Pasture in the Humid Mediterranean Zone of Chile

Despite annual legume pasture are of great importance for dryland agricultural systems in Mediterranean environments, there are few studies of N2 biological fixation (NBF) reported in Chile. In this study the NBF of four annual legume species: subterranean clover (Trifolium subterraneum L.), yellow...

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Autores principales:	Espinoza,Soledad, Ovalle,Carlos, del Pozo,Alejandro, Zagal,Erik, Urquiaga,Segundo
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2011
Materias:	Natural abundance of 15N Mediterranean pastures volcanic soil
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000100016
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spelling	oai:scielo:S0718-583920110001000162018-10-01Biological Fixation of N2 in Mono and Polyspecific Legume Pasture in the Humid Mediterranean Zone of ChileEspinoza,SoledadOvalle,Carlosdel Pozo,AlejandroZagal,ErikUrquiaga,Segundo Natural abundance of 15N Mediterranean pastures volcanic soil Despite annual legume pasture are of great importance for dryland agricultural systems in Mediterranean environments, there are few studies of N2 biological fixation (NBF) reported in Chile. In this study the NBF of four annual legume species: subterranean clover (Trifolium subterraneum L.), yellow serradella (Ornithopus compressus L.), arrow-leaf clover (T. vesiculosum L.), and crimson clover (T. incarnatum L.) (Experiment 1), as well as seven mixtures of these species (Experiment 2) were assessed. The NBF was measured by the 15N natural abundance technique. The objective was to determine NBF in the legume species and in distinct mixtures used. The study was carried out in an Andisol of the Andean Precordillera located in the humid Mediterranean zone of Chile. Pasture was evaluated for biomass; and total N and natural abundance of 15N were analyzed in plant material samples. In Experiment 1 (monospecific legume species pasture), N derived from fixation ranged between 43 and 147 kg N ha-1 and where T. vesiculosum and T. subterraneum presented statistical differences (P ≤ 0.05) in connection with the other species. In the legume mixtures (Experiment 2), N derived by fixation varied between 97 and 214 kg N ha-1 where the 50-50 mixtures (T. subterraneum and O. compressus, or T. subterraneum and T. vesiculosum, respectively) had the highest N fixation. Fixed N ranged between 12 and 25 kg N t-1 DM, showing significant differences among mono and polyspecific legume species.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.71 n.1 20112011-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000100016en10.4067/S0718-58392011000100016
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Natural abundance of 15N Mediterranean pastures volcanic soil
spellingShingle	Natural abundance of 15N Mediterranean pastures volcanic soil Espinoza,Soledad Ovalle,Carlos del Pozo,Alejandro Zagal,Erik Urquiaga,Segundo Biological Fixation of N2 in Mono and Polyspecific Legume Pasture in the Humid Mediterranean Zone of Chile
description	Despite annual legume pasture are of great importance for dryland agricultural systems in Mediterranean environments, there are few studies of N2 biological fixation (NBF) reported in Chile. In this study the NBF of four annual legume species: subterranean clover (Trifolium subterraneum L.), yellow serradella (Ornithopus compressus L.), arrow-leaf clover (T. vesiculosum L.), and crimson clover (T. incarnatum L.) (Experiment 1), as well as seven mixtures of these species (Experiment 2) were assessed. The NBF was measured by the 15N natural abundance technique. The objective was to determine NBF in the legume species and in distinct mixtures used. The study was carried out in an Andisol of the Andean Precordillera located in the humid Mediterranean zone of Chile. Pasture was evaluated for biomass; and total N and natural abundance of 15N were analyzed in plant material samples. In Experiment 1 (monospecific legume species pasture), N derived from fixation ranged between 43 and 147 kg N ha-1 and where T. vesiculosum and T. subterraneum presented statistical differences (P ≤ 0.05) in connection with the other species. In the legume mixtures (Experiment 2), N derived by fixation varied between 97 and 214 kg N ha-1 where the 50-50 mixtures (T. subterraneum and O. compressus, or T. subterraneum and T. vesiculosum, respectively) had the highest N fixation. Fixed N ranged between 12 and 25 kg N t-1 DM, showing significant differences among mono and polyspecific legume species.
author	Espinoza,Soledad Ovalle,Carlos del Pozo,Alejandro Zagal,Erik Urquiaga,Segundo
author_facet	Espinoza,Soledad Ovalle,Carlos del Pozo,Alejandro Zagal,Erik Urquiaga,Segundo
author_sort	Espinoza,Soledad
title	Biological Fixation of N2 in Mono and Polyspecific Legume Pasture in the Humid Mediterranean Zone of Chile
title_short	Biological Fixation of N2 in Mono and Polyspecific Legume Pasture in the Humid Mediterranean Zone of Chile
title_full	Biological Fixation of N2 in Mono and Polyspecific Legume Pasture in the Humid Mediterranean Zone of Chile
title_fullStr	Biological Fixation of N2 in Mono and Polyspecific Legume Pasture in the Humid Mediterranean Zone of Chile
title_full_unstemmed	Biological Fixation of N2 in Mono and Polyspecific Legume Pasture in the Humid Mediterranean Zone of Chile
title_sort	biological fixation of n2 in mono and polyspecific legume pasture in the humid mediterranean zone of chile
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000100016
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Biological Fixation of N2 in Mono and Polyspecific Legume Pasture in the Humid Mediterranean Zone of Chile

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