DESENVOLVIMENTO DE CULTIVARES DE ALFACE SOB APLICAÇÃO DE PÓ DE ROCHA EM HORTA EDUCATIVA.

Abstract

Lettuce is considered the most consumed hardwood vegetable in Brazil, being preferred in salads in natura form and among the olericultores both those who cultivate in the field and those who grow in a protected environment. The objective of this work was to analyze the different responses of lettuce cultivars to the application of rock powder concentrations in the agroclimatic conditions of the Southwest Goian region. The tests were carried out in the municipality of Urutaí - GO. Two experiments were carried out in a randomized block design in a 5x2 factorial, corresponding to five concentrations of rock dust (0, 100, 200, 300 and 400 kg ha-1) in two cultivars. Lettuce Crespa and Americana. Experiment 2 was applied in a randomized complete block design, with 7 lettuce cultivars (Hanson, Simpson S. Preta, Summer Baba, Winter Wonder, Great Lakes, Crespa Palmas and 4 Station). Data collection was performed 45 days after transplanting the seedlings. The results were submitted to analysis of variance and Tukey's regression and test were performed at 5% probability. The dose of 400 kg ha-1 of rock powder did not have an effect on the characteristics of Crespa and Americana lettuce cultivars once that the nutrient mineralization of the rock powder occurs slowly, not interfering in the first cycle of the lettuce. The cultivar 4 Estação presented good environmental adaptability, the agro-climatic conditions of the Southwest Goian, more specifically in Miners, recommending its cultivation in winter-spring.