Composição de substratos e tamanho de recipientes na produção e qualidade das mudas de maracujazeiro 'amarelo'

Abstract

The production of yellow passion fruit seedlings (Passiflora edulis Sims. f. flavicarpa Degener) with genetic and phytosanitary quality, well-nourished and precocious, is of great importance. Fast multiplication depends on some preponderant factors related to seedling production, substrate and recipient. The experiment was realized to evaluate the production of seedlings in different substrates and two bulks recipients, in a seedling nursery at the Universidade Estadual do Mato Grosso do Sul, city of Cassilândia. Four substrates were evaluated: pure soil, soil + manure (2:1), Plantmax® and soil + 150 mg.dm-3 of simple super phosphate and two recipient sizes made of black polystyrene: 14 x 20 cm (1000 mL) and 10 x 20 cm (700 mL). We used a completely randomized experimental design in a 4 (substrates) x 2 (recipients volume) factorial outline, with four replications and ten seeds per plot. The characteristics evaluated were: index of emergency speed (IVE), seedlings height (cm), root length (cm), lap diameter (mm), number of leaves/plant, chlorophyll index (ICC), shoot and root dry mass and total dry mass. The results for the analyzed variables indicated that only for the number of leaves/plant there was a significant difference depending on the size of the recipient. The soil + manure and Plantmaxâ improved all growth parameters in the recipients of 700 mL. Pure soil is not recommended for yellow passion fruit seedlings in both recipients, because they improved only root length and shoot dry mass.