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Response of genotypes of (Hibiscus sabdariffa L.) to NPK and zeolite fertilizer and their effect on physiological traits and yield | ||
| Journal of Medicinal and Industrial Plant Sciences | ||
| Volume 3, Issue 3, September 2025, Pages 1-11 PDF (490.67 K) | ||
| Document Type: Original Article | ||
| DOI: 10.32894/MEDIP.25.3.3.1 | ||
| Authors | ||
| Haider Raad Flaih Al-Zaidi1; Akeel Nagime Abood AL-Mohammedi* 2 | ||
| 1Department of Field Crops, College of Agriculture, Tikrit University, Iraq. | ||
| 2Field Crops Department, College of Agriculture, Tikrit University, Iraq | ||
| Abstract | ||
| A field experiment was conducted in 2024 at a private farm in Hor Rijab, Baghdad Governorate, to evaluate the effects of compound fertilizer and zeolite on the growth, yield, and active components of four roselle (Hibiscus sabdariffa L.) genotypes: Hit Black, Sudan 3, Areb, and Hit Red. Treatments included control, zeolite at 100 kg ha⁻¹, NPK (20:20:20) at 250 kg ha⁻¹, and their combination. The experiment followed a factorial RCBD with three replications (48 units).No significant differences among genotypes were found in days to 50% flowering or maturity, while treatment effects were significant. Hit Black showed superior performance in most traits, recording the highest leaf area index (6.30), chlorophyll a (3.75 mg g⁻¹), total chlorophyll a+b (9.12 mg g⁻¹), phosphorus (0.025%), potassium (0.854%), dry capsule weight (2.29 g plant⁻¹), and calyx yield (683.48 kg ha⁻¹). Hit Red had the highest chlorophyll b (3.75 mg g⁻¹) and nitrogen (0.24%), while Areb had the most seeds per capsule (22.53). The combined NPK + zeolite treatment significantly improved all traits, with values of 162.83 days to flowering, 182.33 days to maturity, leaf area index (6.57), chlorophyll a (6.44 mg g⁻¹), b (4.64 mg g⁻¹), total (10.10 mg g⁻¹), nitrogen (0.25%), phosphorus (0.029%), potassium (0.884%), dry capsule weight (2.61 g plant⁻¹), seeds per capsule (24.18), and calyx yield (799.61 kg ha⁻¹). The Hit Black genotype with this treatment gave the highest values overall. Sudan 3 recorded the highest nitrogen (0.31%) and seed number (24.46), not significantly different from Hit Black and Areb. | ||
Highlights | ||
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| Keywords | ||
| Roselle; Genotypes; Growth traits; NPK fertilizer; Zeolite | ||
| Full Text | ||
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| References | ||
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