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The effect of sulphate levels in the nutrient solution on mineral composition of leaves and sulphate accumulation in the root zone of tomato plants

Iwona Kowalska

Department of Soil Cultivation and Fertilization in Horticulture
University of Agriculture in Kraków
29 Listopada 54, 31-425 Kraków, Poland
e-mail: rokowals@cyf-kr.edu.pl

Tomato plants (‘Cunero’ F1) were grown in 3 independent units of NFT, supplied by nutrient solutions with different primary sulphate levels (mg SO4-2 dm-3); unit: I - 200, II - 400, III - 600. Concentration of sulphates in the nutrient solutions increased during the entire growing season. At the stage of full harvest it reached the level of 850-1000 (I unit), 1000-1100 (II), 1250-1400 (III) and 800-850 (I unit), 900-1000 (II), 1250 (III) mg SO4-2 dm-3, respectively in the year 2000 and 2001. Sulphate accumulation significantly increased the level of S and S-SO4 in the leaves as well as N content (in 2001) and decreased the level of P (in 2000) and Mg (in 2001). There were no effects of different sulphate levels in the nutrient solution on the concentration of assimilation pigments, carotenoids and sulphur amino acids.

Kowalska I., 2004. The effect of sulphate levels in the nutrient solution on mineral composition of leaves and sulphate accumulation in the root zone of tomato plants. Folia Horticulturae 16/1: 3-14.