The influence of biofertilization on the growth, yield and fruit quality of cv. Topaz apple trees

Mosa W.F.A.E-G, Paszt L.S., Frąc M., Trzciński P., Przybył M., Treder W., Klamkowski K. (2016): The influence of biofertilization on the growth, yield and fruit quality of cv. Topaz apple trees. Hort. Sci. (Prague), 43: 105–111. Maiden apple trees of cv. Topaz were planted in 2011. In the spring of 2014, chemical fertilization (NPK) and various bioproducts: Fertigo, Micosat, Humus UP, Humus Active + Aktywit PM, Aktywit PM, BioFeed Quality, BioFeed Amin, Vinassa, Florovit Natura and Florovit Eko alone or enriched with Pantoea sp., Pseudomonas fluorescens, Klebsiella oxytoca and Rhizobium sp. bacteria species were applied to the apple trees to evaluate their effect on the growth, yield and fruit quality. Our results demonstrated that Yeast + beneficial bacteria gave the highest yield in terms of weight and number of fruits per tree in comparison to control and other treatments. Florovit Natura combined with beneficial bacteria significantly increased tree trunk thickness in July and in November 2014 over control. Photosynthetic rate was higher in July than in August 2014. It was improved by both Florovit Natura and Vinassa supplemented with beneficial bacteria over NPK in July and in August 2014, respectively.