الفهرس 
REVIEW OF LITERATUREOnly 14 pages are availabe for public view
 |  | from | 113 |  |  |
| | | from | 113 | | |
Abstract
This study was done on Achillea millefolium, L. plants ?yarrow? in the Agriculture Research Station, Department of Floriculture, Fac. Of Agric., Mansoura University in two seasons (2000/2001) and (2001/2002). It aimed to study the effect of planting date and time of harvest on plant growth, flowering and yield of Achillea herb, flowers and oil. Also to study the effect of storage periods on the quantitative and qualitative properties of Achillea essential oil . Achillea were planted by division in two planting dates, in autumn planting on (1st and 3rd November) and in spring planting on (13th and 15th March). In the two seasons, respectively. Each planting date produced two cuts and plants were air dried under room temperature and stored in paper bags for 2 and 4 months respectively. *This study revealed the following results: 1?Autumn planting gave better results from (plant height fresh and dry weights flowers and oil yield) than spring planting . 2?First cut gave better results from (plant height fresh and dry weights flowers and oil yield) than the second cut . 3?When we study the effect of planting date and storage period on the e.oil percentage we found that storage of Achillea e.oil significantly decreased the e.oil percentage within the stored flowers while there is no significantly difference between the planting dates on e.oil percentage. 4?When we study effect of planting date, time of harvest and storage period on e.oil constituents we found that autumn planting gave higher percentage of chamazulene (the major constituent) and hydrocarbons compounds and lower percentage of oxygenated compounds than spring planting. While the first cut gave higher percentage of chamazulene (the major constituent) than the second cut in both autumn and spring planting and as the storage period increased to 2 months chamazulene percentage increased and decreased thereafter at 4 months storage .