An Example of a New Approach, New Assessment, New Statistical Inference, and New Conclusions from the Published Research by Nikipelova, O., Pyliak, N., & Hodorchuk, V. (2023). Organic fertilizers in increase of hazelnut yield. Interdepartmental Thematic Scientific Collection of Phytosanitary Safety, (69), 118-128. https://doi.org/10.36495/1606-9773.2023.69.118-128.
DOI:
https://doi.org/10.12775/JEHS.2024.61.52256Keywords
biofertilizers, sewage sludge, soil fertility, hazelnut cultivation, sustainable agriculture, circular economy, ecotoxicityAbstract
Background: The declining availability of traditional organic fertilizers and the need for sustainable waste management solutions have sparked interest in alternative nutrient sources for agriculture. This study investigates the potential of sewage sludge-based biofertilizers in hazelnut (Corylus avellana L.) cultivation, addressing both agricultural productivity and environmental concerns.
Objective: To evaluate and compare the effects of sewage sludge-based biofertilizers with traditional organic fertilizers on soil agrochemical properties and assess their environmental safety in hazelnut plantations in the Southern Steppe of Ukraine.
Methods: A two-year field experiment (2021-2022) was conducted, comparing six treatments: control (no fertilizer), cattle manure, chicken manure, two formulations of sewage sludge-based biofertilizers, and pure sewage sludge. Soil samples were analyzed for easily hydrolyzable nitrogen, mobile phosphorus and potassium, organic matter content, and ecotoxicity. Advanced statistical analyses, including ANOVA, Tukey's post-hoc tests, paired t-tests, and correlation analyses, were employed to assess treatment effects and temporal changes.
Results: Statistically significant differences were observed between fertilizer treatments for all major nutrients (p < 0.05). Sewage sludge-based Biofertilizer No. 1 demonstrated superior performance in increasing soil phosphorus content compared to traditional organic fertilizers (306.30 mg/kg vs. 174.75 mg/kg for cattle manure, p < 0.05). All organic fertilizers, including biofertilizers, significantly improved soil nitrogen content over the two-year period (p < 0.05). Potassium levels showed a significant increase (13.41% year-over-year, p < 0.05), while changes in nitrogen and phosphorus levels suggested positive trends but did not reach statistical significance. Importantly, ecotoxicity levels remained low (E < 1.5) across all treatments, indicating minimal short-term environmental risk.
Conclusions: This study provides compelling evidence for the potential of sewage sludge-based biofertilizers as effective and environmentally safe alternatives to traditional organic fertilizers in hazelnut cultivation. The findings have significant implications for sustainable agriculture, waste management, and circular economy practices. However, long-term studies are recommended to fully assess the cumulative effects on soil health, crop productivity, and potential contaminant accumulation. This research contributes to the development of innovative, sustainable fertilization strategies that can address both agricultural productivity and environmental conservation needs.
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