Effect of different nitrogen fertilization levels on plant growth, yield and 6-gingerol content of ginger (Zingiber officinale Roscoe) cultivated in soilless culture system
Ginger or Zingiber officinale Roscoe has been cultivated as a spice and a medicinal herb. Among the various agronomic technologies and practices influencing the production of ginger, fertilization is found to exert a great influence on growth and yield of ginger. This study was conducted to investigate the effect of different nitrogen concentrations on ginger plant growth performance, yield, and 6-gingerol content in rhizomes, cultivated using a soilless culture system. The experimental set up included six treatments (T1-T6) with different levels of N (0-50-100-200-400-600 mg L‑1), which was mixed in the nutrient solution, while P and K levels were held constant at 150 and 200 mg L‑1, respectively. There were significant differences between treatments in terms of plant growth performance, rhizomes yield and 6-gingerol content, after nine months of cultivation. Plants cultivated in the 200 mg L‑1 of N showed the highest growth rate including plant height, shoot and leaves fresh weight, number of tillers, SPAD values, number of leaves, and diameter of tillers compared to other treatments. Data also revealed that the highest rhizome yield was obtained from plants treated with 200 mg L‑1 of N. Rhizomes harvested from the treatment of 400 mg L‑1 of N proved to be superior in 6-gingerol content compared to other treatments throughout the cultivation stages of crop growth. However, rhizomes obtained from plants treated with 200 mg L‑1 of N showed a lower 6-gingerol content but with higher rhizomes biomass. Therefore, planting ginger using a soilless culture system is recommended with the application of 200 mg L‑1 of N to obtain the optimum plant performance in terms of growth, rhizome yields, and 6-gingerol content.
Suhaimi, M.Y. and Sembok, W.S.W.Z.W. (2021). Effect of different nitrogen fertilization levels on plant growth, yield and 6-gingerol content of ginger (Zingiber officinale Roscoe) cultivated in soilless culture system. Acta Hortic. 1321, 117-124
ginger, yield, nitrogen, fertilizer, gingerol