Emergência de plântulas e crescimento inicialde cultivares de amendoim sob resíduos de cana-de-açúcar

Abstract

The objective of this study was to evaluate the effect of the interaction between sugarcane mulch residue soil cover and vinasse application on seedling emergence and initial growth of peanut cultivars. A greenhouse experiment was carried out in pots with soil, in randomized complete blocks, with four replications. The treatments, arranged in a 5 x 2 x 3 factorial, consisted of the combination of five quantities of sugarcane mulch residue cover (0, 5, 10, 15 and 20 t ha-1) followed by application or not of 150 m3 ha-1 of vinasse, on soil planted with the peanuts cultivars IAC-Caiapó, Runner 886 and Tatu. The variables studied were seedling emergence speed, final emergence, plant height and dry above ground plant biomass. It was concluded that, under greenhouse conditions, the presence of sugarcane mulch residue in any of the quantities studied, and of vinasse in the quantity of 150 m3 ha-1, either isolated or in combination, are detrimental to seedling emergence and to the initial growth of peanut. The cultivar Tatu is more tolerant to the presence of these residues on the soil surface, followed by 'Runner 886' and 'IAC-Caiapó'.