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Cut rose quality as affected by calcium supply and translocation.

Baas, R.; Marissen, N.; Dik, A.;

Acta Horticulturae Year: 2000 Issue: No. 518 Pages: 45-54 Ref: 18 ref.

2000

บทคัดย่อ

Cut rose quality as affected by calcium supply and translocation.

In greenhouse experiments, roses (cultivars First Red, Escada and Mercedes) were grown in rockwool with 0.5, 4.0 or 7.0 mM Ca in the nutrient solution. Na, K and Mg concentrations in the nutrient solution varied with Ca concentration. Compared with 4 and 7 mM Ca, 0.5 mM Ca decreased the number of stems and stem weight (length), particularly at higher K and Mg concentrations (12.0 vs 5.0 mM K and 4.8 vs 1.8 mM Mg). Under Ca-deficient conditions, susceptibility to Botrytis cinerea increased, necrosis and abscission of the older leaves occurred, and petal necrosis was slightly higher. Ca uptake and transport are discussed.