Publicação on-line; 42 ref.; 3 tables; 2 illus.; Summary (En)

Abstract

Our study aimed to evaluate the influence of rubber tree plantations (Clones IAN 873 and FX 3864) on microbial
activity, total organic carbon (TOC), and soils chemical attributes, using as reference pasture and secondary forest,
in Rio de Janeiro. The plantations areas showed pH; Mg2+, Ca2+, K+ levels; sum of bases; base saturation, basal
respiration; metabolic quotient; and arylsulfatase and FDA activities in the soil similar to or greater than the values
found in the forest. In contrast, showed lower P and TOC levels; carbon and nitrogen in the microbial biomass;
and β-glucosidase activity than of forest and pasture. Higher acid phosphatase and laccase enzymes activities
was observed in the forest and plantations than in the pasture. Thus, we verified that the rubber tree plantations
(Clones: IAN 873; FX 3864) maintain or improve the quality of some chemical and microbiological attributes of the
soil regarding secondary forest and pasture.

Keywords: soil quality, basal soil respiration, acid phosphatase, β-glucosidase, arylsulfatase.