Folia Horticulturae

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The effect of controlled-release fertilizers on plant growth and on elemental concentration in the soil and leaves of Homalomena ‘Emerald Gem’

Jacek S. Nowak, Zbigniew Strojny

Research Institute of Pomology and Floriculture
Waryńskiego 14, 96-100 Skierniewice, Poland

Homalomena ‘Emerald Gem’ was grown in 12 cm pots during six months on a peat + perlite 3:1 (v/v) mix amended with Osmocote Plus 5-6M (15-10-12), Plantacote 4M (15-10-15), or Plantacote 6M (15-10-15) at rates of 3, 5, 7, and 9 g dm-3 incorporated in the substrate prior to planting. For comparison, plants in a control treatment were fertlized with nutrient solution containing (mmol dm-3): N - 10.7; P-H2PO4 - 1.5; K - 5.5, and microelements, applied in each irrigation. The best growth of Homalomena was obtained in treatments with 3-5 g dm-3 of Osmocote Plus 5-6M, Plantacote 4M and Plantacote 6M. Higher fertilizer rates (7-9 g dm-3) weakened the plant growth. With increasing rates, the pH of the growing medium decreased and soluble salts increased.

Nowak J.S., Strojny Z., 1999. The effect of controlled-release fertilizers on plant growth and on elemental concentration in the soil and leaves of Homalomena ‘Emerald Gem’. Folia Horticulturae 11/2: 87-94.