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BioAtlantis

Type: Seaweed extract, Company: BioAtlantis

Effect

No effect on drought stress tolerance
No effect on nitrogen N use efficiency
No effect on produce quality

BioAtlantis treated Hydrangea, cv. Phantom, grown in a peat-based substrate in reduced water and nitrogen conditions had 1.9 % shorter branches, 7.2 % more branches, 3.3 % less fresh weight, 3.5 % less dry weight, 0.5 % less root development, a 5.9 % higher chlorophyll-index, a 6.6 % lower flavonol-index, a 3.7 % lower anthocyanin-index and a 46.2 % higher stomatal conductance (only determined at -40% reductions) compared to the untreated control grown in the same conditions. No significant effects. 

Trial details
Indoor, greenhouse, peat-based substrate, drought conditions (20 % or 40 % less irrigation) and reduced nitrogen (-20 % or -40%)
Belgium

Crop

Hydrangea, Hydrangea paniculata

Trial application

Method
Foliar spray
Timing
First two applications at the early stage of vegetation at 10 days interval, followed by 2 applications just before the emergence of flower buds at an interval of 10 days
Rate
20 % reductions: 2 L/ha; 40 % reductions: 3 L/ha
Ornamental plant research PCS
2019-2020
Bio4safe trial report Hydrangea 2019-2020
Crop group