EFFECT OF MINERAL, BIO FERTILIZATION, HUMIC ACID AND THEIR INTERACTIONS ON SUGAR BEET

Document Type : Research articles.

Author

Agronomy Department, Faculty of Agriculture, Fayoum University, El -Fayoum, Egypt

Abstract

Two field experiments were conducted during 2014/15 and
2015/16 seasons to study the effect of three mineral nitrogen fertilizer levels
i.e., 60, 90 and 120 kg N/fed and four biofertilization (without
biofertilization, rhizobactrein, phosphorein and dual inoculation) and three
foliar spraying levels with humic acid (water as a control, 12 and 24 g/l) on
yield and its attributes of sugar beet variety Kawemira. The experimental
design was a split-split plot in RCBD with three replications where mineral
nitrogen fertilizer, biofertilization and foliar spraying with humic acid were
allocated in the main, sub and sub-sub plots, respectively.
Results indicated that mineral nitrogen fertilizer and
biofertilization with foliar spraying with humic acid had significant positive
effect on yield, yield components and quality traits. The heaviest root fresh
weight (2.17 kg/plant), root yield (39.77 t/fed) and gross sugar yield (7.13
t/fed) (fed= feddan= 4200 m2) were obtained by the highest level of mineral
nitrogen fertilizer (120 kg N/fed), with application the mixture of
rhizobactrein+ phosphorein as biofertilization with the highest concentration
of foliar sprayed with humic acid (24 g/l).
The results of regression analysis of yield and its attributes
clarified that, there were four traits i.e. sucrose %, root yield, root length and
root fresh weight in the first season, while in the second season, the same
traits except root length were significantly (P ≤ 0.001) contributed to
variation in gross sugar yield.

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