Phosphorus fertigation of trickle-irrigated potato |
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Authors: | I. Papadopoulos |
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Affiliation: | (1) Agricultural Research Institute, Nicosia, Cyprus |
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Abstract: | A 3-year field study, on Pellic Vertisol, investigated the response of trickle-irrigated potato (Solanum tuberosum L.) to four P levels applied with the irrigation water. Waters supplied with 130 and 120 mg l–1 of N and K, respectively, and with P levels of 0, 20, 40 and 60 mg l–1, were applied when the soil water potential was between 0.03 and 0.04 MPa. The water applied at each irrigation was equivalent to 0.8 of pan evaporation from a screened USWB Class A pan. With the application of 40 mg P l–1 no P accumulation deeper in the soil profile occurred, whereas P in petioles was at levels recommended for high yield of good quality. At this P concentration in irrigation water, removal of P from soil by tubers was 22 kg/ha/year. The highest yield of good quality was obtained at 40 mg P l–1. |
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Keywords: | Constant feeding drip irrigation P-nutrition soil-P Solanum tuberosum |
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