الفهرس | Only 14 pages are availabe for public view |
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 |