EFEITO DE EMBALAGENS, AMBIENTES E PERÍODOS DE ARMAZENAMENTO NA GERMINAÇÃO E NO VIGOR DAS SEMENTES DE CEDRO (Cedrela odorata) EM MANAUS - AM

Conservation of seeds of forest species is an important practice for the best use of seedlings production. According to that, this research aimed to evaluate effects of different packaging, environments and periods of storage of Cedrela odorata in conservation of viability and vigor of seeds. The seeds had been submitted to three periods of storage (3, 6 and 9 months) plus control, conditioned in plastic and paper, in refrigerator and natural environment conditions. The adopted delineation was entirely casualized in factorial scheme, with 5 repetitions of 20 seeds. It was analyzed the following variables: percentage of germination and formation of normal plantule. Results indicated that seeds stored in natural surrounding condition had presented drastic reduction in the germination and formation of normal plantule throughout storage periods, on the other hand, in refrigerator condition reduction had been less intense. In relation to the kind of packaging it was not identify any effect, independently of storage environment. It revealed that refrigerator conditions were efficient to preserve germination and vigor of cedar seeds.A conservação de sementes de espécies florestais é prática fundamental para o melhor aproveitamento da produção de mudas. Dessa forma, o objetivo deste estudo foi avaliar o efeito de diferentes embalagens, ambientes e períodos de armazenamento de Cedrela odorata L., na conservação da viabilidade e vigor das sementes. As sementes foram submetidas a três períodos de armazenamento (3, 6 e 9 meses) mais testemunha, acondicionadas em saco plástico e de papel, nas condições de geladeira e ambiente natural. O delineamento foi inteiramente casualizado em esquema fatorial, com cinco repetições de 20 sementes. Analisaram-se as seguintes variáveis: a porcentagem de germinação e a formação de plântulas normais. Os resultados indicaram que as sementes armazenadas na condição ambiente natural apresentaram redução drástica na germinação e na formação de plântulas normais ao longo dos períodos de armazenamento, enquanto na geladeira a redução foi menos intensa. Quanto ao tipo de embalagem, não foi constatado efeito, independentemente do ambiente de armazenamento. Concluiu-se que a condição geladeira foi eficiente para preservar a germinação e vigor das sementes de cedro.Palavras-chave: Sementes florestais; viabilidade; condição de armazenamento; umidade; temperatura. AbstractPackages, environment and storage periods effects in germination and vigor of cedar (Cedrela odorata) seeds in Manaus, AM. Conservation of seeds of forest species is an important practice for the best use of seedlings production. According to that, this research aimed to evaluate effects of different packaging, environments and periods of storage of Cedrela odorata in conservation of viability and vigor of seeds. The seeds had been submitted to three periods of storage (3, 6 and 9 months) plus control, conditioned in plastic and paper, in refrigerator and natural environment conditions. The adopted delineation was entirely casualized in factorial scheme, with 5 repetitions of 20 seeds. It was analyzed the following variables: percentage of germination and formation of normal plantule. Results indicated that seeds stored in natural surrounding condition had presented drastic reduction in the germination and formation of normal plantule throughout storage periods, on the other hand, in refrigerator condition reduction had been less intense. In relation to the kind of packaging it was not identify any effect, independently of storage environment. It revealed that refrigerator conditions were efficient to preserve germination and vigor of cedar seeds.Keywords: Forest seeds; viability; storage conditions; humidity; temperature