Crescimento e sobrevivência de mudas de eucalipto sob doses de boro cultivadas em condições de viveiro e de campo

Abstract

The objective this work carried out under nursery and field conditions was determine the development and survival by eucalypts seedlings under boron rates. The randomized blocks experimental design in a 5 x 2 factorial scheme was used: five rates of boron (0, 0.325, 1.3, 5.2 and 20.8 mg L-1) and two species (Eucalyptus grandis w. Hill ex Maiden and Eucalyptus saligna Sm), with five replicates. The results showed that in two conditions, the eucalypts seedlings grown with 5.2 and 20.8 mg L-1 of boron had significative reduction in diameter and height. The application at 20.8 mg L-1 of boron did not affect the two eucalypts species survival in the field. The Eucalyptus saligna was more sensible than Eucalyptus grandis to boron rates under nursery conditions.