Atributos do solo e rendimento de feijão-comum após associação de adubação verde com composto orgânico e/ou inoculação com rizóbios

Abstract

The combination of soil management practices in Agroecology is common but little studied. This work evaluated the effects of green manures, organic compounds and inoculation of seeds with rhizobia on the soil and yield of common bean. It was a randomized block design, split plots and four replications for two seasons. The plots included: sunn hemp, jack bean and dwarf velvet bean. The subplots, in addition to the control (F1), included: F2 (inoculation), F3 (organic compost to supply 60 kg ha-1 of N) and F4 (inoculation plus organic compost to supply 30 kg ha-1 of N). Soil samples (0.0-0.10 m) were collected before the 1st and after the 2nd harvest. Physical and biological parameters were not changed, as well as organic matter. The jack bean contributed more Ca and Mg to the soil; F3 provided more P, Ca, Mg and Zn and, increased pH. In the 1st harvest, the yield was higher after jack bean; while in the 2nd harvest it occurred after sunn hemp and velvet bean and seed inoculation.