Akademik Veri Yönetim Sistemi
International Journal of Agriculture, Environment and Food Sciences, cilt.9, sa.3, ss.663-669, 2025 (Hakemli Dergi)
This study was conducted to investigate the effects of proline (PR), an amino acid, and
seaweed (SW), which has biostimulant properties, on the growth and development of
green onion (Allium cepa L.) plants. The experiment was conducted in an unheated glass
greenhouse at Van Yüzüncü Yıl University using a randomized block experimental
design. Key growth parameters including plant height, root length, stem diameter, number
of leaves, total fresh and dry weight, and SPAD value were assessed. The results revealed
that the highest plant height (29.24 cm) was recorded in the PR2+ SW1 (100 ppm proline
+ 3 g/L seaweed) treatment, demonstrating a significant synergistic effect compared to
individual applications (p < 0.001). The longest root length was observed in the PR1+
SW2 (50 ppm proline + 5 g/L seaweed) treatment (17.02 cm), suggesting enhanced root
development. The highest stem diameter (5.40 mm) was measured in the SW2 (5 g/L
seaweed) treatment. Regarding biomass accumulation, the PR1+ SW2 treatment resulted
in the highest total fresh weight (172.67 g), while the control group had the lowest (144.00
g). The highest dry weight (22.91 g) was recorded in the PR2+ SW1 treatment. For
chlorophyll content, the PR2+ SW1 treatment yielded the highest SPAD value (69.53),
though the differences were not statistically significant (p = 0.1467). These findings
suggest that proline and seaweed applications can enhance growth and yield in green
onion production, with the PR2+ SW1 combination providing the most favorable results.
However, further studies are needed to determine the optimal application rates, assess
their effectiveness under different environmental conditions, and evaluate their long-term
impact on agricultural production.