Published in Scientific Papers. Series B, Horticulture, Vol. LXIII, Issue 1
Written by Milena YORDANOVA, Zhelyu AVRAMOV, Nidal SHABAN
The aim of this study was to test some cultivars of lettuce for field spring production with November transplanting under non-woven fabric (fleece). The experiment was carried out in the period 2015-2016 in the experimental field on University of Forestry Sofia (42° 7′ N, 23° 43′ E). There were selected 12 cultivars (10 Batavia and 2 Lollo types) with different requirements for the terms and conditions of cultivation. In the second ten days of November the seedlings were planted in the open field, on the block method with four replications. Immediately after the planting, a low tunnel was placed over the bed, covered with non-woven fabric. During the harvesting of production (April) were made biometric measurements (diameter and average weight per plant). At the end was also reported the percentage of dead plants. Six cultivars from Batavia type were highlighted for winter cultivation under non-woven fabric. Regardless of recommendations given for each cultivar it needs they to be screened for each region, microclimate and growing period.
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