The production of lettuce is very profitable due to the short vegetation period and the
possibilities of its cultivation throughout the year. On average, the salad contains 94% water,
2% sugar, 0.6% crude cellulose, 0.6% mineral matter and 1.2% crude protein. It is rich in
vitamins C, B1 and B2, and many mineral elements. Great influence on the quantitative and
qualitative properties of lettuce in addition to the variety and production conditions has a
proper diet. The application of mineral fertilizers results in high yields, but their inadequate
application can cause various problems such are: decrease in dry matter content, deterioration
of salad quality, increase in soil acidity, degeneration of physical properties, increase in
erosion and instability in land aggregates. In order to reduce the use of chemicals and
increase the yield in the same time, the improvement of plant production is moving in the
direction of introducing biofertilizers. In recent years there has been a trend of decreasing the
usage of mineral nutrients, primarily nitrogen, phosphorus and potassium (Haytova, 2013), in
which bio stimulators play a significant role. Therefore, the goal was to determine the impact
of biofertilizers on the yield and quality of lettuce and to investigate the possibility of
streamlining the crop by using biostimulators in lettuce nutrition. The two-factor experiment
was set on a private plot in district Vranjes, East Sarajevo by using the randomized block in
3 replications. The highest yield of lettuce was obtained in the variant with the application of
the biofertilizer Bioplant flora (630.50 g – please state the unit), whereas the lowest was
recorded in the control variant of fertilization (468.00 g). The highest percentage of dry
matter was noted in the third variant of fertilization (Bioplant flora) in the variety Majska
kraljica (6.45%), whilst the lowest percentage was reached in the control variant of the same
variety (4.14%)
