Prediction of cottonseed longevity

Prediction of cottonseed longevity

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– 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 65°C. 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 20°C. 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 KE = 9.240, CW = 5.190, CH = 0.03965 and CQ = 0.000426. The lower limit estimated for application of this equation at 65°C was 3.6% moisture content.

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Main Authors: Usberti, Roberto, Roberts, Eric Hywel, Ellis, Richard Harold
Format: Digital revista
Language:eng
Published: Pesquisa Agropecuaria Brasileira 2006
Online Access:https://seer.sct.embrapa.br/index.php/pab/article/view/7300
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spelling rev-pab-br-article-73002014-10-01T16:32:18Z Prediction of cottonseed longevity Previsão da longevidade de sementes de algodoeiro Usberti, Roberto Roberts, Eric Hywel Ellis, Richard Harold Gossypium hirsutum; seed storage; hardseededness; viability equation Gossypium hirsutum; armazenamento; sementes duras; equação de viabilidade – 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 65°C. 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 20°C. 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 KE = 9.240, CW = 5.190, CH = 0.03965 and CQ = 0.000426. The lower limit estimated for application of this equation at 65°C was 3.6% moisture content. –O objetivo deste trabalho foi determinar as constantes da equação de viabilidade de sementes de algodoeiro e detectar a ocorrência de sementes duras. Três lotes de sementes das cultivares IAC-19 e IAC-20 foram testados, usando 12 níveis de umidade, entre 2,2 e 21,7% e três temperaturas de armazenamento, 40, 50 e 65°C. O grau desejado de umidade das sementes foi alcançado, a 20°C, a partir do valor inicial (em torno de 8,8%), por reidratação, em um recipiente fechado, ou por desidratação em dessecadores com sílica gel. Doze subamostras de sementes para cada tratamento de umidade/temperatura foram acondicionadas, em embalagens de alumínio multifoliadas, e armazenadas naquelas temperaturas, até a obtenção de curvas completas de deterioração. A umidade relativa de equilíbrio das sementes foi registrada. A presença de sementes duras foi detectada em umidades abaixo de 6% e a sua liberação foi alcançada durante o armazenamento ou por meio da remoção do tegumento da semente. A equação de viabilidade calculada foi eficaz em quantificar a resposta da longevidade das sementes em relação às condições de armazenamento por meio de KE = 9,240, CW = 5,190, CH = 0,03965 e CQ = 0,000426. O limite inferior estimado para aplicação dessa equação a 65°C foi 3,6% de umidade. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira 2006-09-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/7300 Pesquisa Agropecuaria Brasileira; v.41, n.9, set. 2006; 1435-1441 Pesquisa Agropecuária Brasileira; v.41, n.9, set. 2006; 1435-1441 1678-3921 0100-104x eng https://seer.sct.embrapa.br/index.php/pab/article/view/7300/12236
institution EMBRAPA
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-pab-br
tag revista
region America del Sur
libraryname Sistema de bibliotecas de EMBRAPA
language eng
format Digital
author Usberti, Roberto
Roberts, Eric Hywel
Ellis, Richard Harold
spellingShingle Usberti, Roberto
Roberts, Eric Hywel
Ellis, Richard Harold
Prediction of cottonseed longevity
author_facet Usberti, Roberto
Roberts, Eric Hywel
Ellis, Richard Harold
author_sort Usberti, Roberto
title Prediction of cottonseed longevity
title_short Prediction of cottonseed longevity
title_full Prediction of cottonseed longevity
title_fullStr Prediction of cottonseed longevity
title_full_unstemmed Prediction of cottonseed longevity
title_sort prediction of cottonseed longevity
description – 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 65°C. 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 20°C. 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 KE = 9.240, CW = 5.190, CH = 0.03965 and CQ = 0.000426. The lower limit estimated for application of this equation at 65°C was 3.6% moisture content.
publisher Pesquisa Agropecuaria Brasileira
publishDate 2006
url https://seer.sct.embrapa.br/index.php/pab/article/view/7300
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AT ellisrichardharold predictionofcottonseedlongevity
AT usbertiroberto previsaodalongevidadedesementesdealgodoeiro
AT robertserichywel previsaodalongevidadedesementesdealgodoeiro
AT ellisrichardharold previsaodalongevidadedesementesdealgodoeiro
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