Produção de mudas de Dypsis decaryi (Jum.) Beentje & J. Dransf: efeito de tratamentos pré-germinativos e de substratos
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Data
2012-08-24
Autores
Dias, Jaine Aparecida de Camargo [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
O mercado nacional de flores e plantas ornamentais se encontra em plena expansão, principalmente o de mudas. Com o intuito de auxiliar os viveiristas quanto à produção de mudas, faz-se necessário buscar por estratégias que viabilizem a produção das mesmas. EXPERIMENTO I: O objetivo desse trabalho foi avaliar o efeito de tratamentos pré- germinativos e de diferentes substratos na germinação dos diásporos e no crescimento da parte aérea de plântulas de Dypsis decaryi. O experimento foi realizado na Universidade Estadual Paulista - UNESP, Campus de Ilha Solteira, conduzido em casa de vegetação (Pad & Fan, temp. 25oC ±3) no período de abril a setembro de 2011; delineamento foi o inteiramente casualizado em esquema fatorial 4 x 3, sendo 1 testemunha e 3 tratamentos pré-germinativos (escarificação mecânica; escarificação mecânica + submersão em água por 24h; submersão em água por 24h) e 3 substratos (areia, substrato comercial e vermiculita). Cada tratamento compôs-se de 100 diásporos, sendo que cada 10 destes constituiu uma repetição, assim, os mesmos foram postos a germinar em vasos de plástico preto (1,3L) preenchidos com os substratos correspondentes. Avaliou-se: % de germinação, índice de velocidade de germinação (IVG), tempo médio de germinação (TMG) e altura de parte aérea da plântula. A não escarificação das sementes, escarificação mecânica e escarificação mecânica + submersão em água por 24 h podem ser utilizadas para a germinação das sementes de D. decaryi. Maiores porcentagens de germinação foram obtidas quando se utilizou a vermiculita. O maior IVG, assim como o menor TMG, foram obtidos com a utilização de vermiculita aliado à escarificação mecânica + submersão em água por 24 h. O substrato Bioplant® proporcionou o maior incremento em altura...
The domestic market for flowers and ornamental plants is booming, especially seedlings. In order to assist the nursery on the seedling production, it is necessary to seek strategies that enable the production of the same. EXPERIMENT I: The objective of this study was to evaluate the effect of pre-germination treatments and different substrates on the germination of the seeds and shoot growth of seedlings of Dypsis decaryi. The experiment was conducted at the Universidade Estadual Paulista - UNESP, Ilha Solteira, conducted in a greenhouse (Pad & Fan, temp. 25 o C ± 3) in the period April to September 2011; design was completely randomized in a factorial 4 x 3, with 1 control and 3 pre-germination treatments (mechanical scarification; chiseling + submersion in water for 24 hours, submersion in water for 24 hours) and 3 substrates (sand, vermiculite and commercial substrate). Each treatment consisted of 100 diaspore, and 10 of these was a repetition, so they were made to germinate in black plastic pots (1.3 L) filled with the corresponding substrates. We evaluated: % germination, germination speed index (GSI), mean germination time (MGT) and height of the seedling shoot. Failure of seed scarification, chiseling and chiseling + submersion in water for 24 h can be used for seed germination of D. decaryi. Higher germination percentages were obtained when using the vermiculite. The largest IVG, as well as lower TMG were obtained with the use of vermiculite together with chiseling + submersion in water for 24 h. The substrate Bioplant ® provided the greatest height of the seedling shoot, but it was not affected by pre-germination treatments. EXPERIMENT II: The objective was to determine the most suitable substrate for the initial development of seedlings of D. decaryi. The seedlings resulting from the first experiment... (Complete abstract click electronic access below)
The domestic market for flowers and ornamental plants is booming, especially seedlings. In order to assist the nursery on the seedling production, it is necessary to seek strategies that enable the production of the same. EXPERIMENT I: The objective of this study was to evaluate the effect of pre-germination treatments and different substrates on the germination of the seeds and shoot growth of seedlings of Dypsis decaryi. The experiment was conducted at the Universidade Estadual Paulista - UNESP, Ilha Solteira, conducted in a greenhouse (Pad & Fan, temp. 25 o C ± 3) in the period April to September 2011; design was completely randomized in a factorial 4 x 3, with 1 control and 3 pre-germination treatments (mechanical scarification; chiseling + submersion in water for 24 hours, submersion in water for 24 hours) and 3 substrates (sand, vermiculite and commercial substrate). Each treatment consisted of 100 diaspore, and 10 of these was a repetition, so they were made to germinate in black plastic pots (1.3 L) filled with the corresponding substrates. We evaluated: % germination, germination speed index (GSI), mean germination time (MGT) and height of the seedling shoot. Failure of seed scarification, chiseling and chiseling + submersion in water for 24 h can be used for seed germination of D. decaryi. Higher germination percentages were obtained when using the vermiculite. The largest IVG, as well as lower TMG were obtained with the use of vermiculite together with chiseling + submersion in water for 24 h. The substrate Bioplant ® provided the greatest height of the seedling shoot, but it was not affected by pre-germination treatments. EXPERIMENT II: The objective was to determine the most suitable substrate for the initial development of seedlings of D. decaryi. The seedlings resulting from the first experiment... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Palmeira, Mudas, Plantas - Propagação, Palms
Como citar
DIAS, Jaine Aparecida de Camargo. Produção de mudas de Dypsis decaryi (Jum.) Beentje & J. Dransf: efeito de tratamentos pré-germinativos e de substratos. 2012. 56 f. Dissertação (mestrado)– Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Engenharia de Ilha Solteira, 2012.