Proportions of peat and carbonized rice husk as substrates for sour passion fruit seedlings
Keywords:
Passiflora edulis Sims, vegetative growth, physical-chemical characteristics.Abstract
Choosing an ideal substrate is crucial for producing quality seedlings. This study aimed to evaluate the effect of different proportions of peat (P) and carbonized rice husk (CRH) on the production of sour passion fruit seedlings. The experiment was conducted in a randomized block design, using six substrate formulations (100% CRH, 80% CRH/20% P, 60% CRH/40% P, 40% CRH/60% P, 20% CRH/80% P, and 100% P), with four replicates and six seedlings per plot. Seedling height (cm), number of leaves, stem diameter (mm), root dry mass (RDM), and shoot dry mass (SDM) (g) were evaluated 150 days after sowing. The obtained data were subjected to polynomial regression analysis. Physical and chemical characteristics of the formulated substrates were also analyzed. The maximum seedling response was estimated at 64.3% peat for RDM, 70.2% for stem diameter, 71.9% for number of leaves, 82.1% for SDM, and 83.7% for height. These formulations showed high porosity, a more acidic pH, and high water retention capacity. Substrates with proportions ranging from 64% to 84% peat and 36% to 16% CRH promoted greater growth of sour passion fruit seedlings.
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Copyright (c) 2025 Marina Martinello Back, Henrique Belmonte Petry, Darlan Rodrigues Marchesi, Gilmar Schafer

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