Utilização de compostos orgânicos como substratos alternativos na produção de mudas de alface

Abstract

For a production of vegetable seedlings with quality, substrates are essential, therefore, they must have physical, chemical and biological characteristics in their formulations, providing a good development of the plants. In this sense, the objective was to evaluate the germination and biomass production of lettuce seedlings on different alternative substrates. The experiment was carried out in a greenhouse at the Federal Institute of Piauí (IFPI), Campus Uruçuí, Piauí. In sowing, three lettuce seeds of the Crespa para Verão variety were used per cell. The experiment was carried out in a completely randomized design. The treatments used were represented by substrates, formulated by different components: carbonized rice husk (CA), crushed sugarcane residue (RC), sugarcane bagasse (BC) and coconut fiber (FC). For the composition of the substrate, organic waste, cattle manure and sand were added in a proportion of 2:2:1 (volume:volume:volume), according to each treatment. After 30 days of sowing, the following evaluations were carried out: germination (%), germination speed index (IVG), number of leaves (NF.) and shoot dry mass (DMPA) and root dry mass (DRM). observed allow us to conclude that the alternative substrates produced with carbonized rice husk and coconut fiber can be used in the production of lettuce seedlings and provides better quality seedlings, with a greater number of leaves and greater production of aerial and root biomass