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O presente trabalho foi desenvolvido em condicoes de casa de vegetacao situada em Parnaiba-PI, municipio onde predominam altas temperaturas. Objetivou-se avaliar a germinacao de diferentes lotes de sementes de alface antes e apos a embebicao em solucao de hipoclorito de sodio (NaCIO). O delineamento experimental foi em blocos casualisados, com os tratamentos dispostos em arranjo fatorial 2 x 7 (duas variaveis como pre-germinativos: com imersao em NaClO e sem imersao em NaClO, e sete cultivares de alface), com quatro repeticoes. As variaveis analisadas foram: Primeira contagem do teste de germinacao (PCG), Teste de germinacao (TG) e Indice de velocidade de germinacao (IVG). Analisando-se os dados obtidos, verificou-se que independente da presenca ou ausencia do tratamento pre-germinativo, a cultivar T6 foi a que apresentou os melhores resultados para as variaveis analisadas. Exceto T2, todas as outras cultivares que receberam tratamento com hipoclorito de sodio (NaClO) obtiveram resultados expressivos, em comparacao com as que nao receberam esse tratamento, entretanto, a germinacao de todos os lotes foi inferior ao estabelecido para comercializacao de sementes de alface, com recomendacoes acima de 80%.  Influence of NaClO on lettuce seed germination in Parnaiba-PI Abstract : The present study aimed to evaluate, under conditions of a greenhouse located in Parnaiba, PI, where high temperatures and after soaking in solution of sodium hypochlorite (NaCIO), the germination of seeds of seven cultivars of lettuce. The experimental design was of randomized blocks, with treatments arranged in factorial arrangement 2 x 7 (two variables as pre-germinativos: with NaClO and immersion without immersion in NaClO, and seven cultivars of lettuce), with four replicates. The seeds were subjected to the following determinations: First germination test score (PCG), germination test (TG) and germination speed Index (IVG). Analyzing the data obtained, it was found that regardless of the presence or absence of treatment pre-germinative, cultivating T6 was presented the best results for the variables analyzed. Except for T2, all other cultivars that received treatment with sodium hypochlorite (NaClO) achieved significant results, compared to those who did not receive this treatment, however, the germination of all batches was lower than that established for commercialization of seeds of lettuce, with recommendations above 80.

Influência do NaClO na germinação de sementes de alface em Parnaíba-PI