Factors influencing rice seedling vigor under different temperature treatments

Rice cultivars with increased seedling vigor have been shown to accumulate biomass more rapidly during the vegetative stage under New South Wales (NSW) conditions. Rapid biomass accumulation is a necessary element in improving the productivity of short-season cultivars. The rice industry in NSW, Aus...

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Bibliographic Details
Main Author Reinke, R. F
Format Conference Proceeding
LanguageEnglish
Published Los Baños, Laguna (Philippines) IRRI 2001
Subjects
BIOMASA
BIOMASS
BIOMASSE
CARACTERISTICAS DE SEMILLAS
CARACTERISTIQUE DES SEMENCES
EMERGENCE
EMERGENCIA
LEVEE
ORYZA SATIVA
SEED CHARACTERISTICS
SEED TREATMENT
TEMPERATURA
TEMPERATURE
TRAITEMENT DES SEMENCES
TRATAMIENTO DE SEMILLAS
VARIEDADES
VARIETE
VARIETIES
VIGOR
VIGOUR
VIGUEUR
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Summary:Rice cultivars with increased seedling vigor have been shown to accumulate biomass more rapidly during the vegetative stage under New South Wales (NSW) conditions. Rapid biomass accumulation is a necessary element in improving the productivity of short-season cultivars. The rice industry in NSW, Australia, requires cultivars with reduced growth duration. Such cultivars are essential for seasons in which the total amount of irrigation water allocated to farmers is reduced or when sowing is delayed. Given the association between seedling vigor and rapid biomass accumulation, this study investigated three variables influencing seedling vigor in 17 rice cultivars of diverse origins under three diurnal temperature regimes (8/22 °C, and 14/28 °C), with the aim of assessing their relative importance and identifying traits that mat be used to improve vigor. The variables were seed size, days from sowing to emergence and leaf elongation rate (LER) immediately following submergence. Seedling vigor was measured as seedling biomass when the third leaf had fully expanded.
Bibliography:F30
F62
2001000139
ISBN:9712201570
9789712201578