ISHS Acta Horticulturae 700: International Symposium Towards Ecologically Sound Fertilisation Strategies for Field Vegetable Production
GREENHOUSE MANAGEMENT OF THE POTASSIUM FERTILIZATION OF A GREEN BEAN CROP |
| Authors: | M.L Segura, R. Granados, J.L. Contreras, E. Martin, J.M. Rodriguez |
| Keywords: | fertigation, greenhouse, potassium-uptake, potassium availability, waste water |
| Abstract:
This work studies the effect of different potassium rates applied by fertigation on the soil-plant system of a Green Bean Crop under greenhouse conditions. The experiment was conducted on a greenhouse green bean crop ‘Helda’, on a sand-mulched sandy loam soil and trickle irrigation. Three different treatments were established: K1 (83 kg K ha-1), K2 (195 kg K ha-1), and K3 (295 kg K ha-1) applied by fertigation. The experimental determinations included the concentration of assimilable potassium in soil at the start and end of the experiment, the element plant extractions by tissue analysis in different plant aerial parts, and the total fruit yield. The concentration of assimilable potassium in soil at the end of the cropping cycle was not affected by the fertigation dose. The K concentration extracted by the aerial part was 17, 19 and 23 g m-2, for treatments K1, K2, and K3 respectively. There was no significant effect of the potassium rate on fruit yield, oscillating between 2.30 and 2.56 kg m-2. | |
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