ISHS Acta Horticulturae 548: International Symposium on Growing Media and Hydroponics
THE EFFECT OF PHOSPHORUS NUTRITION ON GROWTH, FLOWERING AND CHLOROPHYLL FLUORESCENCE OF NEW GUINEA IMPATIENS 'PAGO PAGO' |
| Authors: | J. Nowak, S. Stroka |
| Keywords: | Impatiens hawkeri, fertilization, subirrigation, growth retardation |
| Abstract:
The phosphorus nutrition had a pronounced effect on growth of New Guinea impatiens. P stress reduced plant height and diameter, shoot number, leaf number and leaf dimensions. The leaves and flowers of P deficient plants had darker color, increasing its ornamental value. No dark spots on leaves, leaf yellowing or any other detrimental effects of P deficiency were observed on plants at all treatment levels. P deficient plants flowered about 7 days earlier. The study of fluorescence parameters seems to indicate that the efficiency of the photochemistry of PSII was not greatly affected by P stress. | |
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