Abstract:

Hormones, animal feed additives and synthetic fertilizers used in conventional agriculture have caused the degradation of ecology and endangered the sustainability of the soil. In addition, chemical fertilizers and drugs used in production have led to residues in products, hence the widespread occurrence of many diseases, especially cancer. In this study found that in the Jeromine apple cultivar, rhizobacteria (PGPR), which plant growth promoting bacteria on trees during the full flowering period, algae extract (Chara sp.), vermicompost fertilizer treatments and the effect of combinations of these treatments on quality and biochemical contentents were investigated. For this purpose, PGPR (3%), algae extract (15%), vermicompost (10 kg tree-1) plant growth regulators were applied to the trees. Generally, the treatments increased in total antioxidant, phenolic content and flavanoid content compared to control, which increased quality properties and also had positive effects on biochemical content in fruits. In the study, the highest fruit weight from the treatment of PGPR+vermicompost (346.8 g), the highest lenght of fruit from the treatment vermicompost (82.32 mm), the highest fruit height from the treatment of vermicompost+algea (78.23 mm) and the highest fruit firmness (78.99 N) were obtained from the treatment of algae. It was determined that algae treatment was significantly effective on biochemical contents and the highest total antioxidant activity (92.29% inhibition mg/100g ) and total phenolic content (121.72 mgGAE/100g) obtained from algae treatment. When fruit color values and biochemical contents are evaluated together, it is possible to say that extracts obtained from algae collected from Egirdir Lake give positive results on quality properties. As a result, considering the excessive use of chemical fertilizers, the destruction that occurs in the soil structure and environmental pollution, studies on the use of sustainable and environmentally friendly preparations are important for a more livable world in the future.

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