I. DIMITROV1, I. STANCHEVA2, I. MITOVA1 and E. ATANASOVA1
1 N.Poushkarov Institute of Soil Science, BG-1080 Sofia, Bulgaria
2 BAS, Acad. M.Popov Institute of Plant Physiology, BG-1113 Sofia, Bulgaria
DIMITROV, I., I. STANCHEVA, I. MITOVA and E. ATANASOVA, 2005. Quality and yield of lettuce in dependence of different fertilizer sources. Bulg. J. Agric. Sci., 11: 589-594
The influence of different fertilizer sources on lettuce yield and quality was studied. The field experiment was carried out on alluvial meadow soil in Tsalapitsa experimental station. The experiment included three fertilizer sources: mineral fertilizer, farmyard manure and foliar fertilization. The highest yield values from lettuce were obtained in the variants with mineral fertilization. A beneficial effect of the lettuce quality was observed: high values of soluble sugars and vitamin C content, low level of cellulose and reduced nitrate content.