Avaliação de cultivares de alface crespa sob diferentes ambientes de cultivo, em sistema de produção orgânica no Vale do Açu-RN

Abstract

Lettuce (Lactuca sativa) is the most consumed vegetable in Brazil and in the world. Climate adaptations made its cultivation possible, the commercial expansion and other attributes of lettuce made it one of the favorite hardwoods of farmers. Climatic factors such as temperature and luminosity can interfere in a beneficial or harmful way in the development of lettuce, for example. Although this vegetable is cultivated in all Brazilian regions, there are restrictions on its cultivation, either because of the high heat, as in the interior of the northeastern hinterland, or because of the low temperature of the cold regions of our country, due to the limitation of cultivation. in open field. In this wat, with the objective of evaluating different crisp lettuce cultivars and cultivation environments, in an organic production system, an experiment was carried out in a completely randomized complete blocks with four repetitions, in a split-plot scheme, totaling six treatments. Plot treatments consisted of two cultivation environments (covered area with 50% shading screen and open sky) and the subplots consisted of three curly lettuce cultivars (Veneranda, Solaris and Ariel). The evaluated characteristics were: number of leaves, plant height, plant diameter, fresh mass of shoots and productivity. There was no significant interaction between the different growing environments and crisp lettuce cultivars. Any of the evaluated cultivars can be planted in the two growing environments, since the differences were not significant for most of the evaluated characteristics.