Folia Horticulturae

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Effect of differentiated nitrogen fertilization on nitrate content, nitrate and nitrite reductase activity in winter white cabbage during long-term storage

Renata Wojciechowska, Stanisław Rożek, Maria Leja, Agata Rydz

Department of Plant Physiology
Faculty of Horticulture, Agricultural University
29 Listopada 54, 31-425 Kraków, Poland

The investigations concerned the effect of different nitrogen fertilizer forms on changes in nitrate level, activity of nitrate and nitrite reductase determined in white cabbage during its long- term storage. The following nitrogen fertilizers were applied in the field during growth: ammonium nitrate, ammonium sulphate, urea, and mixture of ammonium sulphate: urea in ratio 1:1. All fertilizers were applied by the broadcast or the placement technique. A significant decrease in nitrate level was observed in the stored cabbage heads, its rate depending more on the nitrogen form used than on the way of its application. In the treatments of broadcast fertilization in 1996 as well as in those of the placement technique in both years of the experiment the activity of nitrate reductase determined in the stored cabbage significantly decreased.

Wojciechowska R., Rożek S., Leja M., Rydz A., 2000. Effect of differentiated nitrogen fertilization on nitrate content, nitrate and nitrite reductase activity in winter white cabbage during long-term storage. Folia Horticulturae 12/1: 45-54.