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vol. 7, nr. 3 (2006)
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Effects of nitrogen form, foliar nutrition and growing place on yield and quality of lettuce
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Iwona Kowalska, Włodzimierz Sady, Anna Szura
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Department of Soil Cultivation and Fertilization, Faculty of Horticulture, Agricultural University, Al. 29 Listopada 54, 31-425 Kraków |
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vol. 7 (2006), nr. 3,
pp. 619-631
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abstract:
The study was concerned with the effects of nitrogen form (nitrate or nitrate-ammonium), foliar nutrition (control or molybdenum or urea-molybdenum), and growing place on the yield and nutritive value of lettuce grown on rockwool. Plants were grown in two seasons (spring and summer-autumn), in a plastic tunnel divided into two parts, covered with plastic differing in light permeability PAR. Among parameters studied the growing place had the highest effect on yield and lettuce quality. The plants grown in part II of the tunnel, with higher permeability, had significantly higher mass. The lowest nitrate content had plants grown on nitrate-ammonium solution in part II of the tunnel. Growing plants on nitrate-ammonium solution resulted in lower total-N content in the spring season and lower vitamin C content in the autumn season. Irrespective of the growing season there was no effect of foliar nutrition on yield and quality parameters.
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keywords:
lettuce, nitrogen form, foliar nutrient, nitrate
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original in:
Polish
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