El-Sayed, S. (2013). YIELD AND QUALITY OF SUGAR BEET AS AFFECTED BY ZINC FOLIAR APPLICATION UNDER DIFFERENT NITROGEN FERTILIZATION LEVELS. Journal of Plant Production, 4(2), 351-362. doi: 10.21608/jpp.2013.72129
Safaa S. M. El-Sayed. "YIELD AND QUALITY OF SUGAR BEET AS AFFECTED BY ZINC FOLIAR APPLICATION UNDER DIFFERENT NITROGEN FERTILIZATION LEVELS". Journal of Plant Production, 4, 2, 2013, 351-362. doi: 10.21608/jpp.2013.72129
El-Sayed, S. (2013). 'YIELD AND QUALITY OF SUGAR BEET AS AFFECTED BY ZINC FOLIAR APPLICATION UNDER DIFFERENT NITROGEN FERTILIZATION LEVELS', Journal of Plant Production, 4(2), pp. 351-362. doi: 10.21608/jpp.2013.72129
El-Sayed, S. YIELD AND QUALITY OF SUGAR BEET AS AFFECTED BY ZINC FOLIAR APPLICATION UNDER DIFFERENT NITROGEN FERTILIZATION LEVELS. Journal of Plant Production, 2013; 4(2): 351-362. doi: 10.21608/jpp.2013.72129
YIELD AND QUALITY OF SUGAR BEET AS AFFECTED BY ZINC FOLIAR APPLICATION UNDER DIFFERENT NITROGEN FERTILIZATION LEVELS
Sugar Crops Res., Inst., Agric. Res. Center, Giza Egypt.
Abstract
Two field experiments were conducted in Sakha Research Station Kafr El-Sheikh Governorate during 2010 /2011 and 2011/2012 seasons to study the effect of the combination between three nitrogen levels ( 60 , 90 and 120 kg / fed ) and four foliar zinc levels ( 0 , 0.5 , 1 and 1.5 g/ l as Zn-EDTA ) on some physiological properties , yield and quality of sugar beet. The obtained results proved that :
The increase of N level up to 120 kg/ fed significantly increased root length and diameter as well as fresh weight/plant , leaf area , leaves zinc uptake , juice impurities content (K, Na and α-amino N) and yields of top and root (ton / fed) whereas , sucrose % , extractable sugar % , purity % and sugar yield were decreased in both seasons.
The middle dose of nitrogen (90 kg N /fed) was the superior as compared with the highest dose (120 kg N/fed) on sucrose % , extractable sugar % , purity % and sugar yield as well as gave the lowest juice impurities content and sugar losses to molasses in both seasons .
The increase of zinc level up to (1.5g/l) significantly increased all studied traits in both seasons except for N leaves content in the 1st season only as well as gave the lowest juice impurities content and sugar losses to molasses.
Fertilization beet plant at the rate of 90 kg N/fed + 1.5 g Zn/l was enough to achieve the highest sugar yield (4.22 and 4.57 ton/fed) ,whereas the increase of N fertilization at the rate of 120 kg N / fed + 1.5 g Zn/l was necessary to attain the highest yields of top (10.01 and 10.78 ton/fed), and root (28.77 and 32.60 ton/fed ) in the 1st and 2nd seasons respectively .
Therefore, it could be recommended that fertilization beet plant at the rate of 90 kg N/fed + 1.5 g Zn/l foliar application maximized sugar yield and technological parameters .
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