Folia Horticulturae

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The effect of plant spacing on the yield and quality of three broccoli cultivars in autumn growing

Edward Kunicki, Ewa Capecka, Piotr Siwek, Andrzej Kalisz

Department of Vegetable Crops
Faculty of Horticulture, Agricultural University
29 Listopada 54, 31-425 Cracow, Poland

Under the climatic conditions of south-east Poland the effect of different plant densities (3.2, 4.0, 5.3, 8.0 plants m-2) of three broccoli cultivars (Kermit, Montilla, Skiff) on the yield and its quality was investigated. Plant density had a significant effect on the marketable yield that ranged from 11.0 t ha-1 (3.2 plants m-2) to 16.6 t ha-1 (8.0 plants m-2). An extreme decrease in plant density resulted in a 46% increase in the mean weight of a broccoli head and the best yield uniformity. No significant effect of the tested cultivars on marketable yield was found. At the greatest plant density the nitrate content was 39% higher than at the lowest. The heads of Kermit cv. contained the highest amount of nitrate (1182.8 mg KNO3 kg-1 f.w. on average) and the heads of Skiff cv. the lowest (955.8 mg KNO3 kg-1 f.w. on average).

Kunicki E., Capecka E., Siwek P., Kalisz A., 1999. The effect of plant spacing on the yield and quality of three broccoli cultivars in autumn gowing. Folia Horticulturae 11/2: 69-79.