Investigadores del INTA y Embrapa –Brasil– buscan determinar qué efecto tiene la radiación solar interceptada sobre el peso de los granos, la calidad industrial y nutracéutica. Con estos resultados, se podrían diseñar prácticas de manejo para mejorar el rendimiento y obtener productos con una calidad específica.
Trabajos en Prensa
Response to the application of glyphosate of beneficial soil fungi associated with Lotus tenuis
In recent years, the Lotus tenuis promotion through glyphosate application has been adopted in Flooding Pampa grasslands, due to the important contribution in forage quantity and quality of this species. However, several studies have shown that the use of glyphosate can cause undesirable effects on beneficial soil microorganisms. The objective of this study was to evaluate the effect of glyphosate application on the arbuscular mycorrhizal fungi and dark septate endophytes associated to L. tenuis. Two treatments were applied in plots located in a L. tenuis pasture: promoted Lotus tenuis and established Lotus tenuis. In the first case, plots were sprayed in winter (late August) with 3.5 l/ha of glyphosate, while in the second treatment plots did not receive herbicide application. Our results demonstrated that the number of viable spores of arbuscular mycorrhizal fungi was 52% lower, and the percentage of arbuscules in L. tenuis plants was 40% lower in the Promoted Lotus tenuis treatment in relation to Established Lotus tenuis treatment. Root colonization by dark septate endophytes was not affected by glyphosate application. The loss of functionality of the mycorrhizal symbiosis might in the medium-term affect not only L. tenuis biomass production, but also the diversity and productivity of the complete plant community. The information generated in this study will be useful to redesign management practices that allow food production with a sustainable use of resources.
Keywords: Arbuscular mycorrhizal fungi, Dark septate endophytes, Herbicide, Lotus tenuis promotion.
1Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Animal. Buenos Aires, Argentina.
Correo electrónico: firstname.lastname@example.org
2Chacra Experimental Integrada Chascomús. Ministerio de Agroindustria. INTA.