Comparisons Between Two Economically Valuable Forest Species (eucalyptus Grandis And Pinus Taeda) In Relation To Seed Behaviour Under Controlled Deterioration1 [comparações Entre Duas Espécies Florestais De Valor Econômico (eucalyptus Grandis And Pinus Taeda) Com Relação Ao Comportamento Das Sementes Sob Deterioração Controlada]
- Fantinatti J.B.
- Usberti R.
DOIAbstract
The objectives of this work were to analyze seed behaviour under controlled deterioration and estimate viability equations for forest species Eucalyptus grandis and Pinus taeda. Desired moisture content levels were achieved from initial values after either rehydration over water or drying over silica gel, both at 25 °C. Seed sub samples with 8 moisture contents each for E. grandis (1.2 to 18.1%, initial value of 11.3%) and P. taeda (1.5 to 19.5%, initial value of 12.9%) were sealed in laminate aluminium-foil packets and stored in incubators maintained at 40, 50 and 65 °C. The seeds from these species exhibited true orthodox and sub-orthodox storage behaviour, respectively, however E. grandis showed higher seed storability, probably due to a...
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