Evaluation of organic materials and liming on exchangeable bases of an acid sulphate soil at greenhouse conditions

Abstract

Acid sulphate soils (ASS) are characterized to be dynamic systems with a continuous chemical degradation processes due to current severe acidification. One of their limitations is related to the inhibition of the absorption of exchangeable bases, generated mainly by excess aluminum rates, which affect their productivity 20and limit the availability of nutrients to plants.This study evaluated the effect of some techniques used in soil remediation on exchangeable bases of ASS, at greenhouse conditions, in order to identify methodologies for the management of these soils in Paipa (Boyacá). An experimental design with 6 treatments and 5 replications was performed, where the incorporation of efficient microorganisms, sugarcane bagasse, green manure and dolomite lime was evaluated as well as the seeding of forage Brassica rapa L.; in which the exchangeable bases were measured before and after planting Brassica oleracea var. Botrytis as indicator crop. For data analysis, was performed ANOVA and was applied Tukey comparison of means with a reliability of 95%. The results indicated that the seeding of B. rapa as forage and incorporating of the same as green manure, with the complementary use of dolomite lime, generated a greater increase in Ca (18.21 cmolc•kg-1 & 16.61 cmolc•kg-1) and Mg (6 cmolc•kg-1 & 5.15 cmolc•kg-1). In terms of K, the highest value was obtained with the addition of green manure (1.31 cmolc•kg-1) respect to the methodologies evaluated.

Keywords

• brassica rapa
• brassica oleracea
• dolomite lime
• organic sources
• recovery