The use of the microbiological tests in the extration of the available zinc of the soils of Piracicaba municipality

Abstract

This paper relates results obtained in the determination of total and soluble Zinc. The HCl 0,1 N EDTA-(NH4)2CO3 and Dithizone-acetato de amônio methods were applied to soil samples from profiles representing 8 soil Series of Piracicaba Municipality, State of São Paulo - Brazil. The determination of both total and soluble Zinc content was carried out by the TRIERWEILER & SINDSAY (1968) method, except the dithizone soluble Zinc that was determined by the SHAW & DEAN (1952) method. The statistical analysis of the data showed a significant correlation between HCl soluble Zinc and to tal Zinc content. The HCl 0,1 N solution's showed a larger capacity than the EDTA and Ditizone Method's to dissolve the available zinc. The Luiz de Quairoz, Bairrinho and Guamium Soils were the highest in available zinc. The Luiz de Queiroz, Bairrinho e Guamium Soils were the largest in Total Zinc.