Effect of some fertilization treatments on anatomical characters and productivity of some sugar beet cultivars under drip irrigation system, Sinai [electronic resource].

Includes reference.

Under drip irrigation system, two field experiments were conducted in 2003/2004 and 2004/2005 seasons at The Experimental Farm of The General Company of Land Reclamation, El-Kantara Shark, Sinai to study the effect of two fertilization treatments on anatomical structure and productivity of 5 sugar beet cvs.;namely, Plena, Top, Kawemira, Gloria and Farida, while the two fertilization treatments were: /00 kg N + 46.5 kg P₂O₅ + 48 kg K₂O /fed (F1) and 20 m3 compost + 67.5 kg N + 3/ kg P₂O₅ + 24 kg K₂O/fed (F2) in the two Seasons Data were recorded at harvest time on /'Oat characteristics ( root length, root diameter and fresh weight/plant) top fresh weight/plant, TSS%, sucrose% and purity% of roots juice, also, root, sugar and top yields (ton!fed.). Anatomical structure of leaves and secondary roots were undertaken in the second season only. Results show that some of the studied parameters of leaves and secondary roots structure varied according to cultivars and fertilization treatments. Regarding leaf structure, sugar beet cv. Top fertilized by F2 recorded the highest values for thickness of midrib, vascular bundle, phloem tissue, xylem tissue, sclerenchyma bl!neath phloem and collenchyma beneath upper epiderms at midrib, as well as, the highest ~'alues of number of xylem arms/vascular bundle and number of xylem vessels/ vascular bundle. sugar beet cv. Gloria{ertilized by F2 gave the maximum values for thickness of palisade tissue + upper epidermis, palisade tissue + lower epidermis, spongy tissue and leaf wing. Concerning secondary root structure, the highest values for root diameter in T S. and number of growth rings were observed in sugar beet cv.Kawemira fertilized by F2 and the maximum thickness of periderm and the highest number of ph ell em rows in sugar beet cv. Top fertilized by F1. Moreover, sugar beet cV.Farida fertilized by F1 gave the maximum thickness of six rows of parenchyma beneath periderm. Over the two seasons, F2 increased significantly top and root weights/plant, sucrose %, purity % and root, sugar and top yields fed comparing with F1. The studied cultivars did not differ significantly from each other in root characteristics (length. diameter and weight), sucrose % and root, top and sugar yields fed, while they diffired in TSS % and purity %. Sugar beet cv. Top recorded the highest values for root diameter, root weight/plant, top weight/plant, roots yield/fed, top yield/fed and sugar yield/fed. in the second season only.

Summary in Arabic.

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