EFEITO DO CALCÁRIO DOLOMÍTICO E METASSILICATO DE CÁLCIO ASSOCIADO AO FÓSFORO EM LATOSSOLO VERMELHO-AMARELO CULTIVADO COM TOMATE

Abstract

This work aimed to evaluate the effects of the fertilization with silica and its effect compared with limestone and interaction with the phosphorus in an Oxissol in tomato. A 5 x 2 factorial randomized block experimental design was adopted with four replication being five levels of metasilicate, five levels of limestone and two of phosphorus. In absence of phosphorus and in the presence limestone negative correlation was observed between stem diameter and content of Al in the soil and positive among stem diameter, root growth and content of P in the plant with the pH soil and the content of Ca in the soil. In the presence of phosphorus, positive correlation was verified among content of P in the plant and fresh matter of root with electrical conductivity of soil and root growth and content of Al in the soil. Using metasilicate of calcium in the absence of phosphorus, significant and positive correlation was observed for root growth with pH soil, Ca and sum of bases sum and content of P in the root with electrical conductivity of soil; in the presence of phosphorus, negative correlation was observed among Na and Al in soil. In the presence of phosphorus, was observed negative correlation among the stem diameter with pH, Ca, sum of bases and electrical conductivity of soil. For the leaf area, plant height, fresh matter in shoot and content of phosphorus in the root was verified significant and positive correlation with Na and the K in soil.