The trial was conducted in variety/rootstock Riesling/Kober 5 BB in the vineyard district of Vrsac. The vineyard was planted in 1996 on a south-facing slope, with rectangular type pruning of 3×1 m. The training system is of symmetric cordon type and mixed type pruning is practiced. At the beginning of vegetation of grapevine, in the vine row microbiological fertilizer (A-Azotobacter chroococcum, AH-Azotobacter chroococcum+humate, ABC- Azotobacter chroococcum+ Bacillus megaterium+Bacillus circulans, and ABC+H-Azotobacter chroococcum+Bacillus megaterium+Bacillus circulans+ humate incorporated in the top 20 cm of soil. Control treatment (K-control) was not fertilizer. In investigation years 2003, 2004 and 2005, it was only fertilizer in vineyard. Microbiological fertilizers were soluble in water. Analyses of the influence type of biofertilizers on total number of bacteria and input populations of bacteria were investigated in harvest period. Results point out that total number of bacteria increase, in comparator of control, in all combination of biofertilizers. Population of Azotobakter choococcum is more numerous than other bacteria. Analyses of chemical composition of wine and wine testing had shown differences between applied beofirtilizers.
Authors: B. SIVCEV, V. RAICEVIC, N. PETROVIC, N. LEKIC and B. LALIC
Faculty of Agriculture, Belgrade-Zemun, Nemanjina 6, Serbia and Montenegro
Keywords: microbiological fertilizer, yield, grape and wine quality