Métodos para acelerar e uniformizar a emergência de plântulas de Schizolobium amazonicum

Dapont, Eleandro Candido; Silva, Josué Bispo da; Oliveira, Jakson Domingos de; Alves, Charline Zaratin; Dutra, Alek Sandro

doi:10.1590/s1806-66902014000300022

Cited by 12 publications

(11 citation statements)

References 6 publications

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“…The values of ESI, for the treatments with caustic soda resemble those obtained by Dapont et al (2014), which obtained averages of ESI statistically equal to that of the control treatment in all the treatments that consisted of immersion of the seeds in concentrated solution of sulfuric acid, even in different periods of imbibition, ranging from 5 to 50 minutes.…”

Section: Resultssupporting

confidence: 70%

Overcoming Dormancy in Seeds of Amazonian Species

Júnior¹,

Leite²,

Soares³

et al. 2018

JAS

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Despite the importance of the Amazonian species Schizolobium amazonicum, there is still no official protocol to favor the germination process of its seeds. The objective of this study was to evaluate methods of overcoming dormancy of paricá seeds and the quality of seedlings produced. The work was carried out at the Federal Institute of Education, Science and Technology of Tocantins-Campus Araguatins. The experimental design was a completely randomized design with seven treatments and four replications. The treatments consisted of: intact seeds; lateral mechanical scarification of the tegument with electric emery for 2 seconds; lateral mechanical scarification of the tegument, using sandpaper number 50 for 1 minute + immersion in water at room temperature for 12 hours; chemical scarification of the tegument with caustic soda at 20% concentration for 30 minutes; chemical scarification of the tegument with caustic soda at a concentration of 20% for 45 minutes; immersion in water at 80 ºC + stay in water (room temperature) for 12 hours; immersion in water at 90 ºC + stay in water (room temperature) for 12 hours. The treatment with lateral mechanical scarification of the integument using electric emery for 2 seconds is the most suitable for overcoming dormancy in paricá seeds. Methods of overcoming dormancy had no influence on the quality of paricá seedlings.

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Section: Resultssupporting

confidence: 70%

Overcoming Dormancy in Seeds of Amazonian Species

Júnior¹,

Leite²,

Soares³

et al. 2018

JAS

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“…The experiment GR was 90%, a similar value to that found by Dapont et al (2014), which promoted dormancy break by scarification with puncture (89%) and water at 100 °C (91%), and by Cruz et al (2007) under immersion treatment in sulfuric acid for 60 minutes (92%). This result is higher than the germination rates by sanding (85%) (Dapont et al, 2014). Thus, the technique of cutting the seed coat for Parica seeds is efficient in detriment to other more complex techniques and difficult to perform in the field or nursery.…”

Section: Germination Phasesupporting

confidence: 70%

Germination and Initial Seedling Growth of Schizolobium amazonicum on Different Substrates and Irrigation Depths

Oliveira

Silva

et al. 2020

Floresta Ambient.

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Due to the good silvicultural characteristics of Schizolobium amazonicum (parica) and its versatility (planting and use), the species has become an alternative in commercial exploitation. Aiming to verify the influence of irrigation depth and substrate on the germination and growth of Parica seedlings, a greenhouse experiment was conducted using randomized blocks in a 2 × 4 bifactorial scheme, with two types of substrates (washed sand and commercial substrate) and four irrigation depths corresponding to 50%, 100%, 150% and 200% of the reference evapotranspiration (ETo), with five replications. Germination rate, emergency speed index and biometric variables were evaluated. The commercial substrate combined with the irrigation level of 50% of ETo favored a higher emergence speed and germination rate. In the growing phase, the irrigation level of 150% of ETo combined with the commercial substrate produced better results, indicating greater survival and development in the field.

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“…De acordo com DAPONT et al (2014), avaliando a superação de dormência em sementes de Schizolobium amazonicum Huber ex Ducke, nos tratamentos com lixa e punção as primeiras plântulas emergiram aos nove dias, com TME/Nt (tempo médio de emergência/número total) de 11,1/85 e 10,4/89, respectivamente. Em estudo de PEREIRA et al (2015), os melhores resultados de TME foram encontrados para os tratamentos com escarificação mecânica com lixa n° 80 e embebição em água à temperatura ambiente durante 48 horas, com valores estatisticamente iguais.…”

Section: Resultsunclassified

SUPERAÇÃO DE DORMÊNCIA EM SEMENTES DE Tachigali myrmecophila (Ducke) Ducke

Pereira¹,

Araújo²,

Simões³

et al. 2015

Enciclopédia Biosfera

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RESUMOObjetivou-se avaliar diferentes métodos de superação de dormência de sementes para potencializar a propagação de Tachigali myrmecophila (Ducke) Ducke. Foram realizados cinco tratamentos: testemunha -fazendo-se apenas a assepsia das sementes por meio da imersão em hipoclorito de sódio (2%) por cinco minutos; escarificação mecânica -assepsia das sementes por meio da imersão em hipoclorito de sódio (2 %) por cinco minutos e abrasão da superfície da semente à lixa nº 80, no lado oposto à micrópila das sementes, para não danificar o embrião; imersão em ácido sulfúrico (98% p.a.) por 10 ou 20 minutos e imersão em água -assepsia das sementes por meio da imersão em hipoclorito de sódio (2 %) por 5 minutos e imersão em água por 24 horas. Empregou-se o delineamento inteiramente casualizado, sendo cinco tratamentos e quatro repetições. Cada parcela foi composta por 25 sementes. Os tratamentos de escarificação mecânica com lixa nº 80 e imersão em ácido sulfúrico por 20 minutos proporcionam maior vigor na emergência e crescimento de plântulas. Para a produção de mudas da espécie, recomenda-se a escarificação mecânica das sementes com lixa, pelo bom resultado de emergência e por dispensar a utilização do ácido sulfúrico. PALAVRAS-CHAVE: Escarificação; espécie florestal; emergência; plântulas. OVERCOMING DORMANCY IN SEEDS OF Tachigali myrmecophila (Ducke)Ducke ABSTRACT Aimed to evaluate different methods of overcoming seed dormancy to enhance the spread of Tachigali myrmecophila (Ducke) Ducke. Five treatments were performed: control -making themselves only asepsis of seeds by soaking in sodium hypochlorite (2%) for five minutes; chiseling -asepsis of seeds by soaking in sodium hypochlorite (2%) for five minutes and seed surface abrasion sandpaper No. 80 on the side opposite to the micropyle seeds, to avoid damage to the embryo; immersion in sulfuric acid (98% pa) for 10 or 20 minutes and immersion in water -asepsis of seeds by soaking in sodium hypochlorite (2%) for 5 minutes and immersion in water for 24

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Métodos para acelerar e uniformizar a emergência de plântulas de Schizolobium amazonicum

Cited by 12 publications

References 6 publications

Overcoming Dormancy in Seeds of Amazonian Species

Overcoming Dormancy in Seeds of Amazonian Species

Germination and Initial Seedling Growth of Schizolobium amazonicum on Different Substrates and Irrigation Depths

SUPERAÇÃO DE DORMÊNCIA EM SEMENTES DE Tachigali myrmecophila (Ducke) Ducke

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