Determinação dos Micronutrientes ( S, Cu, CI, Fe, Mn, Mo e Zn ) em Solos sob Cobertura Florestal da Estação Científica Ferreira Penna, Melgaço-PA

Abstract

The emergence of micronutrient deficiencies due to low soil fertility has been increasingly observed in large agroecological regions of the world. Micronutrient deficiencies in soils impair plant growth and production. The study of micronutrients is primordial as a way to obtain information about soils, with a view to their rational use and to determine their potential for agricultural purposes with minimal ecological risks. As a contribution to the generation of information on the study of the processes that regulate soil-plant relationships, the present work aimed at determining the availability of micronutrients (B, Cu, CI, Fe, Mn, Mo and Zn ) in dryland soils. The study was carried out in the Scientific Station Ferreira Penna, located in the municipality of Melgaço-PA on a YELLOW LATOSSOLO under tropical forest cover. The soils were collected in two distinct periods: Draught (November/2002) and rainy (abriV2003), at depths of 0-lScm; lS-30cm and 30-S0cm, using a "Dutch" type auger. The samples were analyzed according to the procedures used in EMBRAPA (1997). The results of pH in H, o and KCI obtained showed the acid character of the soils, presenting a more accentuated acidity during the rainy season. The data related to micronutrients are being processed in the soil analysis laboratory.