Níveis de nutrientes em cambissolo háplico cultivado com leguminosas consorciadas com cynodon

Abstract

The present work had as objectives to evaluate nutrient levels over four consecutive years of cultivation, in a consortium of pasture legumes system with coastcross and grass, and the grass coastcross in exclusive cultivation. The experimental design used was randomized blocks with composted plots and not composted, in time. The treatments tested were the Arachis pintoi CV. Amarillo consorted with coastcross grass, Arachis pintoi CV. Belmonte grass intercropping coastcross, Stylosanthes guianesis CV. Mineirão grass intercropping coastcross, Stylosanthes guianesis cv. Mineirão consorted with coastcross grass, and the grass coastcross in monoculture. The samplings were carried out in 0-20 depth cm in 2 years. We evaluated the levels of phosphorus, potassium and soil organic matter. And the soil samples for evaluation of physical parameters, where the ring was used at the end of the collection period of collecting samples of plants, 36 months after implementation of the experiment. The data were subjected to analysis of variance and averages were compared by Tukey test at 5% probability level. There were no significant differences between the levels of phosphorus in the evaluated period (2 years). Potassium levels showed significant difference only for those portions that have not received fertilization in the evaluated period. In relation to these organic matter levels were different on the plots fertilized and not composted in the evaluated period. Not been verified effects on soil physical characteristics.