الفهرس 
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Abstract
This study was carried out to give some information that could improve local
and imported cultivars of carrot for their nutritional status and productivity. In this
work the effect of two N forms (ammonium nitrate and ammonium sulphate) and two
levels of micronutrients, without and with (FeEDTA+MnEDTA +MnEDTA) using
two imported cultivars (Nants and Kuroda) plus local genotype on the growth, yield,
quality parameters such as color, sugars, phenols, lycopene, carotene, flavonoids and
antioxidant activity in addition to macro and micronutrients in shoots as well as in
roots were studied. The results indicated that the plant growth and yield were affected
by the source of N and application of micronutrients, whereas generally the best
results were attributed with ammonium sulphate and foliar application of
micronutrients. A huge difference between the two seasons regarding to the response
of local genotype, but the response of imported cultivars were quite similar. Spraying
of micronutrients improved lycopene, carotenoids and flavonoid contents, however
other quality parameters such as sugars, phenols, color, antioxidant activity did not
differed. Antioxidant activity improved by the fertilization of ammonium nitrate,
however, other quality parameters did affected by the source of nitrogen. Macro and
micronutrients in shoots as well as in roots were slightly affected by the genotypes,
N-forms and spraying of micronutrients with unclear trend.
Conclusion:
Interaction between ammonium sulphate and spraying of micronutrients
improved marketable yield in kuroda cultivar. Also, quality of Kuroda improved by
spraying of micronutrients (lycopene, carotenoids) and by ammonium nitrate as Nform
(antioxidant activity).
Keywords: Daucus carota, N-fertilizer, macro and micronutrients, yield, quality