Consorciação de braquiária, milheto e crotalária em safrinha na produção de fitomassa e cobertura do solo

Abstract

Studying the options to increase the diversity of cover crops in succession to the soybean causes a higher phytomass production, so that it consequently promotes the soil cover during the off season. This work aims to identify the contribution of the consortia among brachiaria, millet and crotalaria in succession to the soybean crop for phytomass production and soil cover in the region of Rondonópolis - MT. The experiment was carried out at the experimental station of the Federal University of Mato Grosso in a dystrophic Oxisol, implanted in a randomized block design, with seven treatments and three repetitions: S1- Fallow no-tillage (NT); S2- Pennisetum glaucum; S3- Crotalaria spectabilis; S4- P. glaucum + Urochloa ruziziensis; S5- C. spectabilis + U. ruziziensis; S6- P. glaucum + C. spectabilis; S7- U. ruziziensis. Phytomass evaluations occurred at 0, 15, 30, 60, 90 and 120 days after desiccation. It was found that there was a statistical difference among the treatments, in which all of the consortia had significant effects on phytomass production and soil cover rate. The treatment with U. ruziziensis single and in consortia with C. spectabilis presented greater contribution to the system with phytomass. The P. glaucum presented higher phytomass production in consortia with C. spectabilis. The soybean, sown in succession, obtained higher productivity in the single treatments constituted by U. ruziziensis and C. spectabilis.