Data/hora: 17/06/2024 05:22:23

Provedor de dados: | Pesquisa Agropecuária Brasileira
País: | Brazil
Título: | Prediction of cottonseed longevity
Autores: | Usberti,Roberto; Roberts,Eric Hywel; Ellis,Richard Harold.
Data: | 2006-09-01
Ano: | 2006
Palavras-chave: | Gossypium hirsutum; Seed storage; Hardseededness; Viability equation.
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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000900013

Editor:

Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira

Relação: | 10.1590/S0100-204X2006000900013
Formato: | text/html
Fonte: | Pesquisa Agropecuária Brasileira  v.41 n.9 2006
Fonte: | info:eu-repo/semantics/openAccess