Evaluation of bio-fertilization and pre-sowing seeds’ magnetization on the quality and productivity of Roselle (Hibiscus sabdariffa L.) cultivars and on the soil fertility | ||
| Egyptian Journal of Agricultural Research | ||
| Articles in Press, Accepted Manuscript, Available Online from 16 October 2025 | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2025.395639.1685 | ||
| Authors | ||
| Khalid A. Shaban1; Mohamed I. Mohaseb* 1; Engy A. Soltan2; Nevien M. Eid2; Faten M. Mohamed1 | ||
| 1Soils, Water and Environment Research Institute, Agricultural Research Center, Giza, Egypt | ||
| 2Horticulture Research Institute, Agriculture Research Center, Agricultural Research Center, Giza, Egypt | ||
| Abstract | ||
| The aim of this study is to assess the effect of seeds' magnetization time before sowing combined with the bio-fertilization at different rates of mineral N fertilization on the quality and productivity of roselle (Hibiscus sabdariffa L.) cultivars and on the soil fertility. Bright and dark red calyces of roselle cultivars were cultivated in two split-plot field experiments during the successive summers of the years 2022 and 2023. The main plots were the applied mineral N fertilization rates (0, 35, 50, and 70 kg N fed-1), while the times of pre-sowing seeds' magnetization (0, 15, 30 and 60 min) were the sub-plots. All treatments were triplicated. A bacterium culture contains two types of bacteria (1st type: FMw 879336, 2nd type: Pseudomonas Sp.) plus liquid vinasse as a carrier were used as the bio-fertilizer that was foliar-applied (30 L fed-1) before transplanting, on soil before planting and at 25, 45 and 65 days after sowing on soil and plant. The results indicated that the 50 kg N fed-1 application combined with 30 min magnetization time of seeds before cultivation and bio-fertilization has significantly decreased the soil EC by 38.5% (from 4.88 to 3.0 dS m-1) and increased the soil organic matter OM by 26.2% relative to the same treatment without bio-fertilizer or without magnetization (from 0.65 to 0.82%). The soil available N, P, Fe, Mn and Zn were significantly increased by 49.4, 22.5, 29.2, 87.7, and 26.9%, respectively, with the same treatment. The plant growth components, protein, carbohydrate, Anthocyanin, and chlorophyll were improved. | ||
| Keywords | ||
| Bio-fertilizer; soil fertility; mineral nitrogen fertilizer; magnetic field times; Roselle | ||
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