Abstract

LOVATO ECHEVERRIA, R.A.; GIMENEZ, L.I.  and  LOPEZ, M.G.. Ecología de comunidades de malezas de arroz (Oryza sativa L.) como aporte hacia una agricultura sustentable. RIA. Rev. investig. agropecu. [online]. 2022, vol.48, n.2, pp.148-154. ISSN 1669-2314.

This paper analyze from an ecological approach weeds communities and indicators plants in rice crop sites at a regional scale in the province of Corrientes. Sites were subjected to a hierarchical classification procedure according to presence-absence and abundance-dominance of species. There was found a clear correspondence between a priori sites habitats typology and classification typology. The communities life forms structure showed the predominance, in terms of species frequency, of terrestrial plants over marsh and aquatic plants, and of perennials over annuals. From the indicator plants point of view, several species, such as Digitaria cilirias, Echinochloa colona and Stapfochloa elata had a preferential distribution by high landscape positions and moderately hydromorphic habitats. In contrast, species such as Juncus pallescens and Panicum dichotomiflorum showed a greater ecological amplitude, with affinity for a wider range of topographic positions, and tolerance to accentuated hydromorphism and high soil aluminum content.

The results of this study can provide guidelines for the development of ecological management strategies of weeds, directed to modify occupied niches for weeds and subjecting them to different environmental stress conditions. They also highlight the contribution of rice wetlands to the preservation of regional plant diversity.

Keywords : wetlands; indicator plants; plant life forms..

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )