ISHS Acta Horticulturae 318: II International Symposium on Specialty and Exotic Vegetable Crops
EFFECT OF NITROGEN, PHOSPHORUS AND POTASSIUM ON GROWTH AND ELEMENTAL COMPOSITION OF WINGED BEAN, PSOPHOCARPUS TETRAGONOLOBUS (L.) DC., SEEDLINGS |
| Author: | A. A. Csizinszky |
| Keywords: | Plant height, trifoliate leaves, fresh weight, dry matter, shoots, roots |
| Abstract:
Winged bean, Psophocarpus tetragonolobus (L.) DC., strain TPt-1, seedlings were raised in a greenhouse with four levels of N, P and K. When the concentration of one of the elements was 0.00, 0.33, 0.66, or 1.00x, the concentration of the other two elements was kept at 1.00x(1x = 178 mg kg-1 of sand). After 56 days of growth, seedlings were tallest (P≤0.05) with the 1:1:1 (N:P:K) treatments. Plant height, number of trifoliate leaves, fresh weight of shoots and dry weight of roots decreased as one of the elements in the medium decreased. In shoots, increasing N-rates increased N and reduced P, K, Mg, Cu, Fe, Mn, Mo, Zn concentrations. Increased P-rates increased P, K, Mn and Zn concentrations. Increasing K rates increased K and reduced P, Ca and Mg concentrations. | |
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