Increased nitrogen N use efficiency
Increased phosphorous P use efficiency
Increased potassium K use efficiency
Potted plants of Rhododendron 'Tortoiseshell Orange' were grown on either 100% fertilization (0,8 µS/cm) or with 50% nutrient stress (0,4µS/cm). The amount of water recieved via top irrigation was the same for both. At 100% fertilization, fresh weight increased with 7%, plant surface increased with 9% and the chlorophyll content increased compared to the control.
At 50% fertilization, a small increase in fresh weight, plant surface and chlorophyll content were found. Leaves of the plants in nutrient stress contained less N, P and K, but more Ca and Mn.
Indoor, frost free greenhouse, peat based substrate, P12 plant pot, continuous nutrient stress
Mix with substrate and pour on the pot
During potting and once after 4 weeks
10 ml/m³ substrate