Effects of Irrigation Level, Plant Density and Nitrogen Doses on Grain Yield and Yield Parameters of Sweet Sorghum (Sorghum bicolor L. Moench var. saccharatum)

Year 2025, Volume: 30 Issue: 1, 76 - 87, 23.06.2025

Güngör Köstereli , İlhan Turgut

https://doi.org/10.17557/tjfc.1649968

Cited By: 1

Abstract

Experiments were carried out at Bursa Uludag University Faculty of Agriculture Application and Research Centre, in 2022 and 2023 summer seasons to evaluate the effects of irrigation level, plant density and nitrogen dose on grain yield and yield parameters of sweet sorghum [Sorghum bicolor (L.) Moench var. saccharatum]. Each field trail included thirty-two treatments represent the combinations among four irrigation levels, two planting densities and four nitrogen fertilization doses. A split-split plot design with three replications was used in both seasons, where the four deficit irrigation levels (0%, 33%, 66% and 100% of crop evapotranspiration (ETc)) were arranged in the main plots, while two planting densities (142857 and 285714 plants ha⁻¹) were randomly allocated in the sub plots and the four nitrogen doses (0, 70, 140 and 210 kg ha⁻¹) were randomly distributed in the sub-sub plots. The results showed the three factors and their interactions on grain yield and yield components were found significant. Grain yield increased with increasing irrigation level, plant density, nitrogen doses and their interactions in both years. In the study, maximum grain yield was obtained with all N doses at I₃ in 2022, while it was obtained with N₃ in I₁, I₂ and I₃ in 2023. Grain yield increased with increasing plant density in 2022, it did not interact with nitrogen doses, but they interacted in 2023 and the highest grain yield was determined at N₃ interacting with P₂. In the plant density and irrigation level interactions, the maximum grain yield was obtained from the interaction of D₂ and I₃ in the rainy year 2022, while it was obtained from the interaction of D₂ and I₂ in the dry year 2023.

Keywords

density , irrigation level , nitrogen , sweet sorghum

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