الفهرس 
EFFECT OF ORGANIC AND MINERAL FERTILIZATION ON THE YIELD AND OIL QUALITY OF ROSEMARYOnly 14 pages are availabe for public view
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Abstract
This study had been conducted at the Experimental Research Station of the Faculty of Agriculture, Shatby, Alexandria University, during the two successive seasons of 2016/17 & 2017/18 to find out the effect of mineral and organic fertilization on the yield and oil quality of rosemary (Rosmarinus officinalis L.) plants.
The mineral fertilizer (NPK) was used at the percentage of (20:5:5) at four levels which were 0, 100, 200 and 300 Kg./fed./season, and the organic fertilizer was the cattle manure (CM) which used at five rates which were 0, 20, 30, 40 and 50 m3/fed./season, as well as the interaction between them.
The experimental design was a split-plot design in RCBD, including 20 treatments. Each treatment was replicated 3 times, each replicate consisted of 20 plots, each plot consisted of 3 plants, the mineral fertilization was the main plot, and the organic fertilization was the sub plot.
5.1. Effect Of Mineral Fertilization:
5.1.1. On Vegetative Growth:
Most of the vegetative growth traits responded significantly to NPK fertilization levels.
Generally, the treatment of 300 Kg. NPK/fed. (for the two cuts of the two seasons) had the most effect on rosemary plants height, branches number, leaves fresh and dry weight per plant and per feddan and stems fresh and dry weight per plant, without a significant difference with the level of 200 Kg. NPK/fed. in some traits at some cuts compared with the untreated plants.
5.1.2. On Essential Oil Yield, Quality And Chemical Composition:
All NPK treatments had a significant effect on rosemary fresh leaves content of total chlorophyll compared with the untreated plants, the treatment of 300 Kg. NPK/fed. (for the two cuts of the two seasons) had the most effect on the content of total chlorophyll in rosemary fresh leaves.
The highest essential oil percentage was obtained from the fresh leaves of the plants which were treated with the treatment of 300 Kg. NPK/fed. at the first cut of the first season and second cut of the second season, and from the treatment of 100 Kg. NPK/fed. at the second cut of the first season, and from the treatment of 0 Kg. NPK/fed. (control) at the first cut of the second season.
The highest essential oil yield per plant and per feddan was obtained from the fresh leaves of the plants which were treated with the treatment of 300 Kg. NPK/fed. at the all studied cuts except the second cut of the first season which gave the highest yield from the plants that treated with the treatment of 200 Kg. NPK/fed compared.