ABSTRACT
This study was carried out from 1995 to 1996, at the Laboratory of Irrigation and Salinity of of the Department of Agricultural Engineering of CCT/UFPB. The effects of the application of Primavera bentonite, on the soil physico-hydrical properties , were evaluated in samples of a eutrophic rhegosol. Such samples of soil from 0 to 20 cm depth were incubated for 120 days with doses of bentonite equivalent to 0, 30, 60 and 90 t ha-1. After this time, the hydraulic condutivity of the soil and their physico-hydrical properties were determined. The soil water retention increased with the bentonite doses. When compared with the control the available water for plants increased with the bentonite application. The hydraulic condutivity decresead in relation to the control.
Key words:
bentonite; eutrophic rhegosol; soil water retention; available water for the plants; hydraulic conductivity; physico-hydrical properties