Abstract
The use of microbial inoculums is a part of sustainable agricultural practices. Among various bioeffectors, the phosphorus-mobilizing bacteria are frequently used.
 The objective of this study is to investigate the effect of some industrial biofertilizer inoculums, of containing P-mobilizing bacteria on the quantity and some quality parameters of tomato fruits. Spore-forming industrial Bacillus amyloliquefaciens FZB42 (Rhizovital) as single inoculums and combinations with other Bacillus strains (Biorex) were applied on Solanum lycopersicon Mill. var. Mobil test plant. Soil microbial counts, phosphorus availability, yield and fruit quality, such as total soluble solids (TSS) content and sugars (glucose, fructose) were assessed. The results found that single industrial inoculums of FZB42 product had positive effect on P-availability and fruit quality in the pots. Fruit quality parameters, TSS content, soluble sugars were significantly improved (p<0.05). Such better fruit taste was correlated significantly by the most probable number (MPN) microbial counts. Use of such bioeffector products is supported by the positive interrelation among measured soil characteristics and inside healthy quality parameters of tomato fruits.
Highlights
Sustainable agriculture and healthy food production is one of the most important key aspects nowadays (FAO, 2003)
An increasing demand exists for fruits and vegetables of avoiding the use of chemical fertilizers and pesticides (Doran and Zeiss, 2000; Jakab and Kátai, 2013; Németh and Várallyay, 2015)
Various microbial diversity and types of microorganisms are living in the soils, including both bacteria and fungi with known general and/or highly specific nutrient mobilization ability (Schweitzer et al, 2008)
Summary
Sustainable agriculture and healthy food production is one of the most important key aspects nowadays (FAO, 2003). An increasing demand exists for fruits and vegetables of avoiding the use of chemical fertilizers and pesticides (Doran and Zeiss, 2000; Jakab and Kátai, 2013; Németh and Várallyay, 2015). Crucial requirements of reducing artificial chemicals and xenobiotic inputs, especially among horticultural practices (Kassam et al, 2009; Mónok and Füleky, 2017; Madarász et al, 2018). Various microbial diversity and types of microorganisms are living in the soils, including both bacteria and fungi with known general and/or highly specific nutrient mobilization ability (Schweitzer et al, 2008). Active microbial soil characteristics were largely ignored, due to the mainly artificial plant nutrient fertilizing practices. Eco-friendly production methods and chemical-free farming systems are increasing (www.biofector.info)
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