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Van Yüzüncü Yıl Üniversitesi, Ziraat Fakültesi, Tarla Bitkileri Bölümü, Van
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Van Yüzüncü Yıl Üniversitesi, Ziraat Fakültesi, Tarla Bitkileri Bölümü, Van
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Van Yüzüncü Yıl Üniversitesi, Ziraat Fakültesi, Tarla Bitkileri Bölümü, Van
Abstract
This study was conducted in 2022 at the experimental field of the Department of Field Crops, Faculty of Agriculture, Van Yüzüncü Yıl University, using the Master cultivar of Italian ryegrass. The objective was to investigate the effects of different nitrogen doses (0, 5, 10, 15, and 20 kg da⁻¹) on SPAD values. During the experiment, three harvests were taken, and SPAD measurements were performed at both the pre-flowering and full-flowering stages of the plants. The results revealed that increasing nitrogen doses significantly and consistently enhanced chlorophyll content. At the pre-flowering stage, the highest SPAD values were recorded in the second harvest with 56.467 at 20 kg da⁻¹ and 55.333 at 15 kg da⁻¹ nitrogen applications, while the lowest value was observed in the first harvest in the control plots. Based on harvest averages, the second harvest produced higher values compared to the others. A similar trend was observed at the full-flowering stage, where rising nitrogen doses caused a gradual increase in SPAD values. Compared to the control, the application of 20 kg da⁻¹ nitrogen resulted in the greatest increase in SPAD values at both growth stages, demonstrating that chlorophyll content in Italian ryegrass varies depending on both nitrogen levels and phenological stages. Based on these findings, the role of increasing nitrogen doses in enhancing SPAD values, regardless of pre- or post-flowering stages, should be considered, and harvesting can be scheduled according to chlorophyll content.
Keywords
Italian ryegrass,SPAD value,nitrogen doses
How to Cite
AĞIRAĞAÇ, Z., KİTAPÇI , T., & ZORER ÇELEBİ , Şeyda. (2025). Effects of Different Nitrogen Doses on SPAD Values of Italian Ryegrass (Lolium multiflorum Lam.) at Pre-Flowering and Full Flowering Stages. MAS Journal of Applied Sciences, 10(4), 635–642. https://doi.org/10.5281/zenodo.17768737
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Talha KİTAPÇI
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