Seed viability constants for Eucalyptus grandis

Pesquisa Agropecuária Brasileira

Jussara Bertho Fantinatti²  Roberto Usberti¹ 

[1] ,Universidade Estadual de Campinas Fac. de Engenharia Agrícola Campinas SP ,Brazil

关键词: seed deterioration;    storage;    seed longevity;    deterioração de sementes;    armazenamento;    longevidade de sementes;   

DOI  :  10.1590/S0100-204X2007000100015

来源: SciELO

【 摘 要 】

This work aimed to analyse Eucalyptus grandis W.Hill ex Maiden seed behaviour, under controlled deterioration, and to estimate viability equation constants for the species. Seeds were harvested in the growing season of 1999, and the moisture contents were adjusted from 11.3% to a range between 1.2 and 18.1% at 25ºC. The subsamples were sealed into laminate aluminium-foil packets, for storage in incubators at 40, 50 and 65±0.5ºC. The seeds presented orthodox performance, in which the constants for predicting seed longevity of E. grandis were K E = 9.661, C W = 6.467, C H = 0.03498 and C Q = 0.0002330. The usual and inverse relationship between water content and seed longevity was also observed. The lowest moisture content limit for application of the viability equation at 65ºC was 4.9%, estimated under hygroscopic equilibrium with 23% of relative humidity in the storage environment.

【 授权许可】

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