Evaluation of nitrous oxide emission by soybean inoculated with Bradyrhizobium strains commonly used as inoculants in South America

Aims: The purpose of this work was to analyze the agronomic and environmental performance of soybean plants inoculated with the Bradyrhizobium strains widely used as soybean biofertilizers in South America and to determine if these strains possess any functional or taxonomic trait associated with the NO emission. Methods: Bradyrhizobium japonicum E109 and CPAC 15, B. diazoefficiens USDA 110 and CPAC 7, and B. elkanii SEMIA 5019 and SEMIA 587 were used to inoculate soybean seeds. The field experiment was carried out in a soil without history of soybean cultivation in the Argentinian Humid Pampa. The natural N abundance method was applied to estimate N-fixation, and NO production was evaluated using gas chromatography. Among other physiological parameters, shoot dry weight, shoot N content, and crop yield were estimated after harvest. Results: B. japonicum inoculation produced the greatest increases in soybean growth and crop yield but also led to higher NO emissions compared to all other inoculated treatments. Plants inoculated with B. diazoefficiens released the lowest amount of NO, and their growth and yield were the least affected. Inoculation with B. elkanii resulted in intermediate NO emission fluxes and crop yield compared with B. japonicum and B. diazoefficiens. Conclusions: We found that soybean inoculation with strains of B. japonicum and B. elkanii that lack the nosZ gene led to the highest NO emissions under field conditions, but also to the highest crop yield, while inoculation with strains that carry out complete denitrification, nosZ-containing B. diazoefficiens, showed lower NO emission and lower crop yield.To the Instituto de Investigaciones Agrobiotecnológicas (INIAB); Universidad Nacional de Río Cuarto (UNRC); Consejo Nacional de Investigaciones Científcas y Tecnológicas (CONICET), Fondo Nacional de Ciencia y Tecnología (FONCyT); Instituto Nacional de Tecnología Agropecuaria (INTA). FC is Researcher of CONICET at the UNRC. DT and FD are Postdoc and PhD students at the UNRC granted by CONICET. MOC is a former PhD student at the UNRC granted by CONICET. To Mariano Cicchino from INTA Chascomús, who was in charge of sowing and yield estimation at R8. To Juan Pedro Ezquiaga from INTA Castelar, for their contribution to N2O measurements

New multifunctional catalysts for the steam reforming of bioethanol

SSCI-VIDE+CARE+CDSInternational audienceNon

Morphometrics of Pampas foxes (Pseudalopex gymnocercus) in the Argentine Pampas

The size of a mammal is closely related to and influences virtually every aspect of its biology (McNab 1971, Clutton-Brock and Harvey 1983) from its physiology and behaviour to its life history and ecology (Gehrt and Fritzell 1999). Total mammalian body mass may indicate the condition of individuals (Sweitzer and Berger 1993) and the mean body mass across individuals may indicate the health of a population (Harder and Kirkpatrick 1994, Warrick and Cypher 1999). Therefore, morphological information may be particularly valuable when managing populations. Sexual dimorphism is a frequent source of intra-specific variability, and it should be taken into consideration in population studies. Moderate sexual dimorphism is common among canids, with females on average 3%–4% smaller in linear measurements than males (Hildebrand 1953).Fil: Luengos Vidal, Estela Maris. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Lucherini, Mauro. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Casanave, Emma Beatriz. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Sillero-Zubiri, Claudio. University of Oxford; Reino Unido. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Microdontomerus anthonomi (Crawford) (Hymenoptera: Torymidae), an indigenous parasitoid of the introduced biological control insects Bangasternus orientalis (Capiomont) (Coleoptera: Curculionidae) and Urophora affinis Frauenfeld (Diptera: Tehritidae)

Volume: 66Start Page: 162End Page: 16

Apprentice Scholarly Writing in a Community Of Practice: An Intraview of an NNES Graduate Student Writing a Research Article

Little is known about what an apprentice scholar in a non-Anglophone context undergoes when writing a research article for publication in English-medium journals. This study highlights "a rich notion of agency" by examining a nonnative-English-speaking graduate student's engagement with his community of practice (Lave & Wenger, 1991; Wenger, 1998) as he wrote the first draft of an article in chemistry. The primary data were the student's process logs, his developing text, and his Bulletin Board System message exchanges and post-hoc interviews. The study illustrates the apprentice scholar's engagement with the local research community, the laboratory data, his own experience/practice of writing research articles (RAs), and the global specialist research community. His engagement with the global specialist research community includes a critical orientation. The article also points out the value of providing EAP pedagogical support for the critical perspectives that students like Yuan adopt, and it calls for the training of EAP-qualified professionals in non-Anglophone contexts.link_to_subscribed_fulltex