Effect of some bioproducts on the growth, yield and fruit quality of apple trees

Abstract

These experiments began with the planting of maiden apple trees of cv. 'Topaz' in 2011. In springtime in 2012-2016, chemical fertilisation (NPK) and various natural bioproducts, namely Fertigo, Micosat, Humus UP, Humus Active + Aktywit PM, Aktywit PM, BioFeed Quality, BioFeed Amin, Vinassa, Florovit Natura and Florovit Eko were applied to the apple trees alone or enriched with Pantoea sp., Pseudomonas fluorescens, Klebsiella oxytoca and Rhizobium bacterial species. Growth, yield and fruit quality parameters were then evaluated. Our results reveal that the trunk cross-sectional area was greatly increased by the addition of the beneficial bacteria to Humus UP, Yeast, Vinassa and Micosat, as compared to NPK chemical fertilisation. Yeast, Vinassa, Micosat, Humus UP and BioFeed Amin enriched with the beneficial bacteria significantly increased fruit weight in kg and the number of fruits compared to the NPK control in 2015 and 2016.