Crescimento e produtividade de dois tipos de alface cultivadas com diferentes espaçamentos entre plantas

Abstract

The objective of this work was to evaluate the growth and yield of two types of lettuce cultivated with different spacing. American Lucy Brown lettuce and Veronica crisp lettuce plants with plant spacing of 20 cm, 25 cm and 30 cm and row spacing of 25 cm were studied. The treatments were arranged in a 2 x 3 factorial scheme, in a randomized block design with four replications. At 49 days after sowing the lettuce was harvested. Growth data (plant height, plant cross-sectional diameter and number of leaves) were analyzed in time subdivided plots as a function of the evaluation times, subjected to variance analysis, and when significant differences were detected by the F test, at 5% probability, were submitted to regression analysis. Harvest data were subjected to analysis of variance and, when significant differences were detected by the F test were compared by the t test for varieties and Tukey for spacing, both at 5% probability. The lettuce height (6.89 cm) was significantly higher than the curly lettuce (6.39 cm). Fresh lettuce mass (11.88 Mg / ha) was significantly higher than curly lettuce (9.86 Mg / ha). The transverse diameter of marketable lettuce plants was 1.46 cm higher than curly lettuce. Under the conditions in which the experiment was conducted it was concluded that there was no influence of the spacing between plants studied. The largest accumulation of leaf fresh mass and cross-sectional diameter of marketable plants was from the Lucy Brown American lettuce plants in comparison to Veronica crisp lettuce.