Folia Horticulturae

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The effect of covering and cultivation methods on crisp lettuce yields

Paweł Słodkowski, Ewa Rekowska

Department of Vegetable Growing
Agricultural University of Szczecin
Janosika 8, 71-424 Szczecin, Poland
e-mail: warzywa@ns.rektor.ar.szczecin.pl

In the years 1998-2000 a field experiment was carried out in order to examine the effect of the use of a cultivation method (cultivation by sowing seed directly in the field and from seedlings produced in a seed-bed) and covering crisp lettuce ‘Samba’ with perforated foil (100 holes per 1 m2) and with polypropylene non-woven fabric (Agryl P17). The covers were used only during the seedling production. The seeds were sown at the end of March and at the beginning of April. The spacing between plants was 25×30 cm. It was found that the covers applied in the experiment speeded up plant crop by 8 days on average, in the case of cultivation by sowing seed directly in the field, and by 3 days, when the plants were cultivated from seedlings produced in the seed-bed. The highest yield (6.50 kg m-2) of crisp lettuce was obtained when the plants were grown from seed sown directly in the field, using perforated foil. Also, the heads of the plants from this object were the highest (528 g).

Słodkowski P., Rekowska E., 2003. The effect of covering and cultivation methods on crisp lettuce yields. Folia Horticulturae 15/1: 19-23.