%0 Journal Article
%T Dormancy breaking in Mauritia flexuosa seeds by using mechanical scarification and soaking = Supera  o de dorm那ncia em sementes de buriti por meio da escarifica  o mecanica e embebi  o
%A Alexsander Seleguini
%A Yanuzi Mara Vargas Camilo
%A Eli Regina Barboza de Souza
%A Maria L迆cia Martins
%J Agro@mbiente On-line
%D 2012
%I Universidade Federal de Roraima
%X The majority of Arecaceae species presents difficulties to germinate, even under appropriate conditions, complicating the seedlings production process. This study aimed at evaluating the influence of seed scarification and soaking in the emergence and development of Mauritia flexuosa seedlings. The treatments consisted of a combination of seed soaking and scarification methods, in a completely randomized design, in a 2 x 3 + 1 factorial scheme, with five replications. Seeds with and without scarification, combined with soaking methods (not soaked seeds and seeds soaked for 30 days, with and without daily water renewal), plus an additional treatment, where the seeds were scarified after soaking for 30 days, were tested. The seedlingemergence up to 146 days after sowing (d.a.s.) was evaluated, as well as the emergence rate index (46 and 146 d.a.s.) and growth components (146 d.a.s.). The results were submitted to the variance analysis (F test) and means compared by using the Tukey test, at 5%. It was possible to conclude that the Mauritia flexuosa seeds presented tegument dormancy. The seed scarification increased the germination rate, however, it contributed to increase the seeds mortality rate. The soaking of nonscarified seeds for 30 days, with daily water renewal, improved the potential for seed germination. The mechanical scarification, without or after soaking the seeds in water, increased the Mauritia flexuosa seedlings mortality rate, and it is not, therefore, a suitable method for dormancy breaking. = A maioria das esp谷cies de Arecaceae apresenta dificuldades para germinar, mesmo sob condi  es adequadas, dificultando a produ  o de mudas. Objetivou-se, com este trabalho, avaliar a influ那ncia da escarifica  o e embebi  o de sementes na emerg那ncia e desenvolvimento de mudas de buritizeiro. Os tratamentos foram compostos pela combina  o de m谷todos de embebi  o e escarifica  o de sementes, adotando-se o delineamento inteiramente casualizado, no esquema fatorial 2 x 3 + 1, com cinco repeti  es. Foram testadas sementes com e sem escarifica  o, combinadas com m谷todos de embebi  o (sementes n o embebidas e sementes embebidas por 30 dias, com e sem renova  o di芍ria de 芍gua), al谷m de um tratamento adicional, onde as sementes foram escarificadas ap車s a embebi  o por 30 dias. Foi avaliada a emerg那ncia de plantulas aos 46, 66, 86, 106, 126 e 146 dias ap車s a semeadura (DAS), bem como o 赤ndice de velocidade de emerg那ncia (46 e 146 DAS) e os componentes de crescimento (146 DAS). Os resultados foram submetidos 角 an芍lise de variancia (Teste F) e as m谷dias comparada
%K Mauritia flexuosa L.
%K Seedlings emergence
%K Tegument dormancy
%K Seedlings production = Palavras-chave 每 Mauritia flexuosa L.
%K Emerg那ncia de plantulas
%K Dorm那ncia tegumentar
%K Produ  o de mudas.
%U http://revista.ufrr.br/index.php/agroambiente/article/view/755