Effects of agricultural practices in the rice crop system on nematode communities in Uruguay

V. Korenko, C. Schmidt


An investigation was undertaken on the structure of the nematode community in the rice crop system by studying it under a rice crop, rotation prairie and improved natural prairie in Uruguay. Forty-nine genera of soil nematodes were identified. Bacterial-feeding nematodes were the most abundant in rice crops and in rotation prairie. Fungal-feeding, plant parasitic and predator nematodes occurred in large populations in improved natural prairie. Predator nematodes were not found in rice crops. Indices of richness and diversity were significantly different between prairies and rice crops. Analysis of correspondences showed that bacterial-feeding nematodes characterized the rice crop and that plant parasitic and predator nematodes characterized the improved natural prairie.

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