Registro completo |
Provedor de dados: |
PAB
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País: |
Brazil
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Título: |
Prediction of cottonseed longevity
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Autores: |
Usberti,Roberto
Roberts,Eric Hywel
Ellis,Richard Harold
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Data: |
2006-09-01
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Ano: |
2006
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Palavras-chave: |
Gossypium hirsutum
Seed storage
Hardseededness
Viability equation
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Resumo: |
The objective of this work was to determine the viability equation constants for cottonseed and to detect the occurrence and depletion of hardseededness. Three seedlots of Brazilian cultivars IAC-19 and IAC-20 were tested, using 12 moisture content levels, ranging from 2.2 to 21.7% and three storage temperatures, 40, 50 and 65ºC. Seed moisture content level was reached from the initial value (around 8.8%) either by rehydration, in a closed container, or by drying in desiccators containing silica gel, both at 20ºC. Twelve seed subsamples for each moisture content/temperature treatment were sealed in laminated aluminium-foil packets and stored in incubators at those temperatures, until complete survival curves were obtained. Seed equilibrium relative humidity was recorded. Hardseededness was detected at moisture content levels below 6% and its releasing was achieved either naturally, during storage period, or artificially through seed coat removal. The viability equation quantified the response of seed longevity to storage environment well with K E = 9.240, C W = 5.190, C H = 0.03965 and C Q = 0.000426. The lower limit estimated for application of this equation at 65ºC was 3.6% moisture content.
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Tipo: |
Info:eu-repo/semantics/article
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Idioma: |
Inglês
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Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000900013
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Editor: |
Embrapa Secretaria de Pesquisa e Desenvolvimento
Pesquisa Agropecuária Brasileira
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Relação: |
10.1590/S0100-204X2006000900013
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Formato: |
text/html
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Fonte: |
Pesquisa Agropecuária Brasileira v.41 n.9 2006
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Direitos: |
info:eu-repo/semantics/openAccess
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