Abstract
Two field trials were carried out at El-Manyal Village, Talkha District, Dakahlia Governorate during 2012/2013 and 2013/2014 seasons to evaluate the role of three micronutrients (Fe) at the rate of 0, 250 and 500 ppm, zinc (Zn) at the rate of 0, 100 and 200 ppm and boron at the rate of 0, 100 and 200 ppm on productivity and quality of sugar beet, cv. Kawemira. A split-split plot design with four replicates was used in these experiments.The main results could be summarized as follows: 1- Raising iron (Fe) rates from 0.0 to 500 ppm (0.0 to 200 g/fad.), significantly increased all studied characters over both seasons, except for the percentages of root sucrose and root juice apparent purity in both seasons, where it significantly decreased root juice apparent purity in the first season, while it resulted in insignificant effects on the percentages of root sucrose in both seasons and the percentage of root juice apparent purity in the second season. 2- Raising zinc (Zn) concentrations from 0.0 to 200 ppm (0.0 to 40 and 80 g/fad.) resulted in gradual significant increases in all studied characters over the two seasons, except for root juice apparent purity %, which was significantly decreased in the first season, while it was insignificantly decreased in the second season. 3- Raising boron (B) concentrations from 0.0 to 100 and 200 ppm (0.0 to 40 and 80 g/fad), markedly increased all studied characters over both seasons, except root juice apparent purity %, which was insignificantly decreased in both seasons. 4- Root length (cm) and sugar yield (t/fad) were significantly affected by the interaction between the concentrations of both iron (Fe) and zinc (Zn) in the second season. Generally, it could be concluded that spraying beet plants with iron (Fe) at rate of 200 g/fad. and 80 g/fad. of each one of zinc (Zn) and boron (B) is the suitable conclusion to maximize its productivity and quality under the environmental conditions of Dakahlia Governorate.
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