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Prediction of cottonseed longevity

Usberti, R., Roberts, E. H. and Ellis, R. H. (2006) Prediction of cottonseed longevity. Pesquisa Agropecuaria Brasileira, 41 (9). pp. 1435-1441. ISSN 0100-204X

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To link to this item DOI: 10.1590/S0100-204X2006000900013

Abstract/Summary

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 degrees 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 degrees 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 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 65 degrees C was 3.6% moisture content.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Agriculture, Policy and Development
ID Code:9308
Uncontrolled Keywords:Gossypium hirsutum, seed storage, hardseededness, viability equation, SEED VIABILITY CONSTANTS, MOISTURE-CONTENT LIMIT, STORAGE, EQUATIONS
Publisher:FapUNIFESP (SciELO)

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