EFFECT OF DIFFERENT HARVeSTING STAGES ON QUANTITY AND QUALITY OF HERB AND OIL YIELD OF EGYPTIAN THYME ( Thymus vulgaris L. ) PLANT. | ||||
| Journal of Plant Production | ||||
| Article 13, Volume 30, Issue 12, December 2005, Page 7987-7994 PDF (94.56 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2005.237943 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| E. M. Badawy,1; A. S. EI·Leithy1; Safaa E. Aly2 | ||||
| 1Fac. Agric., Cairo Univ., Ornamental Hort. Dept. | ||||
| 2Food Technology Research Institute, Agric. Research Center Giza. | ||||
| Abstract | ||||
| This study was carried out during the season of 2002 at Faculty of Agriculture, Ornamental Horticulture Department and Food Technology Research Institute, Agricultural Research Center (ARC) Giza, Egypt. The seasonal variation of herb composition, essential oil content of Egyptian thyme (Thymus vulgaris L.), Physiochemical properties 01 the essential oil and analyzed by GC were examined. The results showed that at pre-tlowerinq stage, thyme herb contained the highest content of moisture and total carbohydrates. The highest protein, ash and oil contents were obtained at lull flowering stage. Whereas the highest content of fat as well as crude fiber were obtained at post flowering stage The essential oil characterized by a highest content of thymol at full flowering stage .The specific gravity and refractive index of oil did not change appreciably due to the different harvesting stages. The essential oil at pre-flowering stage contained the highest p-cymene, linalool and carvacrol contents. A delay in harvesting from pre- flowering to post flowering stage decreased acid and ester values. | ||||
| Keywords | ||||
| Thymus vulgaris; Lamiaceae; essential oil composition; seasonal variation; physicochemical properties; chemical composition of thyme herb | ||||
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