INFLUÊNCIA DE DIFERENTES SUBSTRATOS NO CRESCIMENTO INICIAL DE MUDAS DE ALFACE

Abstract

The lettuce is the more consumed vegetable foliage in Brazil, being she the preferred among the olericultores both those who cultivate in the field like those who cultivate in a protected environment. The goal of the work was to evaluate the development initial of lettuce seedlings on different substrates in the southwestern of Goiás, in the city Urutaí – GO. Was used experimental lineation completely randomized (DIC), where the treatments were divided into T1: Carolina Soil (commercial substrate), T2: naked earth, T3: Hortaliça Plus (commercial substrate), T4: Hortaliça Plus + Carolina Soil, T5: Hortaliça Plus + naked earth + Carolina Soil, with 80 repetitions each. From the 7th day after sowing, the collection (total of five collections) of the plants was started, for carrying out height assessments, number of leaves, leaf area, fresh mass and dry mass, and growth rates absolute and relative and net assimilation. The result of the evaluations growth rates indicated the possibility planting of seedlings produced on substrates Hortaliça Plus ® and Carolina Soil ® at 21 days after sowing, presenting at least four leaves, although the Carolina Soil ® substrate have secured at the end of evaluations the best results in height, dry mass, specific leaf area and in the rates of absolute growth and net assimilation.