Folia Horticulturae

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Direct plant covering and soil mulching in the spring production of some Chinese cabbage cultivars. Effect of temperature on premature bolting

Andrzej Kalisz, Stanisław Cebula

Department of Vegetable Crops and Horticultural Economics
Faculty of Horticulture, University of Agriculture in Kraków
29 Listopada 54, 31-425 Kraków, Poland
e-mail: akalisz@poczta.onet.pl

The effect of air and soil temperature on premature bolting of Chinese cabbage cultivars Optico F1, Akala F1, Sumiko F1, and Parkin F1 grown in spring was investigated. An unfavourable effect of low air temperatures during hardening of transplants was noted, which brought about an increase in the percentage of bolting plants. The application of plastic covers during field cultivation considerably improved the thermal conditions of the air and soil in comparison with the control object, leading to an increase in plant resistance to vernalization. The greatest reduction in bolting was caused by non-woven PP and PE-75 film. Optiko F1 proved to be only slightly susceptible to bolting, revealing a lack or fairly small share of vernalized plants. Sumiko F1 and Parkin F1 turned out to be distinctly irresistant to thermal conditions in spring, however, both responding well to covering with non-woven PP.

Kalisz A., Cebula S., 2001. Direct plant covering and soil mulching in the spring production of some Chinese cabbage cultivars. Effect of temperature on premature bolting. Folia Horticulturae 13/1: 13-22.