<b>Evaluation of nematodes communities in organic agricultural system</b> - DOI: 10.4025/actasciagron.v31i3.433

Abstract

This study had the objective to evaluate the effects of different agricultural systems in the community of nematodes in an area of the organic farm in Seropédica, Rio de Janeiro State. The treatments consisted of the following cultivations: 1 - pineapple; 2-bean; 3 - consortium corn/bean; 4 - araruta; 5 - pasture and 6 - capoeira. The appraised parameters were: Relative abundance, trophic group, index of Shannon, Dominance, Equitativity, MI, MI2-5, and the faunistic analysis of the nematodes. The relative abundance floated between 0.02 and 0.59, the number of genus varied between 4 and 14 and the accumulated wealth it was of 21 genus. 79% of the nematodes are plant feeders, 14.5% bacterial-feeders, 4.7% omnivorous-predators and 1.1% fungal-feeders. The indices that evaluated the nematodes community allowed establishing them as bioindicators of the quality of the systems of cultivations. The system araruta presented the best agroecological conditions, due to the high values of the indexes of Shannon, Equitatividade, MI, MI2-5 and higher values of SI.