Influence of Foliar Application with Micronutrients on Productivity of Three Sugar Beet Cultivars under Drip Irrigation in Sandy Soils

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 Two field experiments were conducted at the Desert Experimental Station of the Fac. of Agric., Cairo Univ. in Wadi El-Natroon, during 2012/2013 and 2013/2014 seasons to study the response of sugar beet yield and some of its attributes in three multigerm seed cultivars, viz. Heba, Ninagri and Halawa under drip irrigation in a split plot design to foliar application with zinc (Zn) + Manganese (Mn) + Iron (Fe) + Boron (B). The mixture of micronutrients was applied at three different concentrations, viz. 50 Zn + 50 Mn + 50 Fe + 500 B (C ), 100 Zn + 100 Mn + 100 Fe + 1000 B (C ) and 150 Zn + 150 Mn + 150 Fe + 1500 B (C ) in ppm/L, as well as, 12 3 the control treatment of distilled water (C ). The results revealed that increasing micronutrients mixture from 0 C level up to C level significantly increased root weight by 21.54% and 23.81%, root yield by 28.00% and 0 3 24.40% and sugar yield by 76.50% and 60.61% in the first and second seasons, respectively. Quality traits, in terms of total soluble solids (TSS), sucrose%, purity% and extractable sucrose% were significantly increased by increasing levels of micronutrients in both seasons. The highest values of such traits resulted from C level. 3 The sugar beet cultivar Halawa recorded the highest and significant values of mean root weight (0.93 and 0.98 kg), root yield (23.52 and 24.34 ton/fed.), extractable sucrose% (14.04 and 13.59%) and sugar yield (3.34 and 3.35 ton/fed.) in the first and second seasons, respectively. The interaction between micronutrients and cultivars was significant for mean root weight, root yield, purity%, extractable sucrose% and sugar yield in both seasons. Spraying cultivar Halawa with C and/or C level was recommended for high root and sugar yields.

M.I. Masri
M. Hamza
World Journal of Agricultural Sciences