The results of the experiments indicate a positive influence of the applied bioproducts on root growth characteristicsand the degree of mycorrhizal association in the roots of strawberry plants of the cultivars Elsanta andElkat. The biopreparations: BioFeed Quality, BioFeed Amin, Vinassa and Florovit Eko increased the intensityof root growth in strawberry plants in comparison with the control plants fertilizedwith NPK . Application of BioFeed Quality contributed to a six-fold increase in rootlength, and a seven-fold increase in root surface area. Compared to NPK fertilization, application of the preparationBioFeed Amin resulted in an eight-fold increase in root volume, and the biofertilizer Vinassa increased asmuch as 24-fold the number of root tips in Elkat strawberry plants. The number of root tips in Elsanta plants fertilizedwith the biofertilizer Florovit Eko increased three-fold in relation to the roots of plants fertilized withNPK. Compared to the roots of the strawberry cultivar Elsanta,4×8 flood tray the cultivar Elkat was characterized by longerroots, with a larger diameter, volume and surface area, and a greater number of root tips.
Similar results on thebeneficial effects of the same bioproducts on the growth of strawberry plants of the cultivar Elsanta in a greenhouseexperiment had been obtained by Sas Paszt et al. . On the basis of these results it can be concludedthat Micosat, Humus UP, manure, and Vinassa have a beneficial effect on root growth characteristics as comparedto control plants fertilized with NPK. Also Malusa et al. , in a greenhouse experiment, had reported apositive influence of fertilization with biopreparations on root growth in three varieties of strawberry plants.The tested biopreparations also had a positive influence on the degree of mycorrhizal association and thenumber of AMF spores obtained from the rhizosphere soil of strawberry plants. Micosat F and Humus UP contributed to a five-fold increase in mycorrhizal frequency, while the preparation Micosat F and manure increasedfrom two to four times the number of spores in the rhizosphere soil of strawberry plants .In the rhizospheresoil of Elkat strawberry plants, a greater number of spores was observed than in the soil collected from under theplants of the cultivar Elsanta. Sas Paszt et al. , in a greenhouse experiment, had reported similar results forElsanta plants.
They observed that the preparations Micosat F and Humus UP increased twenty-fold the degreeof mycorrhizal association in the roots, and Micosat F and BioFeed Amin contributed to the increase in thenumber of spores of AMF in the rhizosphere of strawberry plants. Malusa et al. had found that inoculationof the roots of strawberry plants with the preparation Micosat F significantly increased the number of spores inthe rhizosphere of the strawberry cultivars in the study.The applied biopreparations such as Humus UP, BioFeed Amin and Florovit Eko contributed to a doubling ofthe total number of bacteria and filamentous fungi in the rhizosphere soil of Elsanta and Elkat strawberry plantscompared to NPK fertilization . The soil from the root zone of Elsanta plants was characterized by agreater number of bacteria and filamentous fungi than the rhizosphere soil collected from under the plants of thecultivar Elkat. Similar results were obtained by Ding et al. , who conducted an assessment of rhizospherebacteria and the effects of biofertilizers in reducing bacterial wilt in potatoes under greenhouse conditions.They showed that PGPR 1 increased three times the overall number of microorganisms and the number of actinomycetes,ebb flow tray while the application of PGPR 2 resulted in a doubling of the total number of fungi and the total numberof azotobacter bacteria in the soil.
Sas Paszt et al. examined the effects of biostimulators on plant growth and crop size and quality instrawberry plants of the cultivars Elsanta and Honeoye. Their results suggest that the use of the preparation Vinassaand BioFeed Amin, and the biopreparations Humus UP and Humus Active + Aktywit PM improved theyield and weight of strawberry fruit, and also the green colour of the leaves of strawberry plants, compared tocontrol plants. The best yields and the heaviest fruits were produced by strawberry plants of the cultivar Elsantaas a result of foliar spraying with the preparation Vinassa. The focus on business sustainability rather than generic aspects of sustainabilityhas attracted more attention to sustainability in all sectors including food andhorticulture. Unlike other industries, food sector has received more public attentionin regard to sustainability . This led to increased food costs. Sustainability issues are complex by nature .