Portal de Periódicos da CAPES

Artigo Acesso aberto Produção Nacional Revisado por pares

BIBTEX RIS

Reação do solo e disponibilidade de micronutrientes, em solo de textura média, tratado com lodo de esgoto e cultivado com milho

2008; Editora da Universidade Estadual de Maringá (Eduem); Volume: 30; Issue: 4 Linguagem: Inglês

10.4025/actasciagron.v30i4.5320

1807-8621

Ervim Lenzi, Ana Tereza Jordão Pigozzo, Jorge de Lucas Júnior, Carlos Alberto Scapim, Pedro Soares Vidigal Filho, Antônio Carlos Saraiva da Costa,

Plant Micronutrient Interactions and Effects

The evaluation of micronutrient availability in agricultural soil treated with sewage sludge was developed in field with maize cultivation on a Dystrophic Red Latosol. The experiment used a randomized complete block design, with the treatments in a split-plot scheme, in time, with six doses of sewage sludge (main-plot treatment) in relation to the five sampling periods for the soil (subplot treatment), with four replications. The sewage sludge was applied in the superficial layer (0-20 cm). The micronutrients Fe, Cu, Mn and Zn were extracted from the soils using a DTPA (diethylenetriaminepentaacetic acid) solution. The same micronutrients were analyzed in the plant tissue after the nitric-perchloric decomposition of the maize samples by spectrometric atomic absorption. The results showed an increasing amount of Fe, Mn, Zn, Cu, Cation Exchange Capacity (CEC) and a decreasing pH in the soil. The increasing doses of sewage sludge increased the Fe, Mn, Cu and Zn availability in the soil solution, and the uptake amount by maize plants were always greater than the control values.