الفهرس 
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Abstract
Two field experiments were carried out at Nubaria, Egypt during 2017/2018 and
2018/2019 seasons, to the effect of biofertilizer and growth regulators on sugar beet (Beta
vulgaris L. var Kowemira) under Nubaria region.
The experimental design was split plot design in three replications, experiment
unit was 10.5 m2, included 5 ridges, 60 cm apart and 3.5 m long, (1/400 fed, fed= 4200
m2 = 0.405 hectare). The main plots were occupied by growth regulators (water,
Gibberellin (GA3), Kainten (K), Indole acetic acid=IAA) at the rate of 300 mg/l, while
the sub plots were occupied by mineral and biofertilizer i.e. (100% mineral-N, 75%
mineral- N + Cerealine, 75% mineral N + Nitrobine, 50% mineral N + Cerealine +
Nitrobine).
The recorded results could be summarized in the following point:
5.1 Growth and growth attributes
Using indole acetic acid (IAA) recorded the heaviest plant weight (g),
followed by Kainten application then gibberellin as compared with control
treatment (spray water) which recorded the lowest ones.
The heaviest plants were given with fertilizing sugar beet plants by 50%
mineral N + biofertilizers Cerealine + Nitrobine in both seasons. Meanwhile,
100% mineral N or 75% mineral N + Cerealine gave the lowest ones.
Foliar application of Kainten (K) as growth regulators and combination of
75 % mineral fertilizer with Cerealine as biofertilizer (T2) recorded the
highest mean values of plant weight (g) followed by gibberellin + T4 then
IAA + T4 in both seasons/
Application of indole acetic acid (IAA) recorded the highest mean values of
root weight (g) as compared with control treatment (spray water) which
recorded the lowest ones in both seasons.
The highest mean values of root weight (g) with fertilizing sugar beet plants
by 50% mineral N + biofertilizers (Cerealine + Nitrobine) in both seasons.
Meanwhile, 100% mineral fertilizer N or 75% mineral N + Cerealine gave the
lowest ones in both seasons.
The highest mean values of root weight (g) recorded by foliar application of
growth regulator (IAA) with T4 (50% mineral N + Cerealine + Nitrobine)
followed by gibberellin + T4, meanwhile the lowest ones recorded by control
+ T2 in the first and the second seasons.
Using indole acetic acid (IAA) recorded the highest mean values of root
length (cm) as compared with control treatment (spray water) which recorded
the lowest ones in both seasons.
The highest mean values of root length (cm) with fertilizing sugar beet plants
by 50% mineral N + Cerealine + Nitrobine in both seasons. Meanwhile, 100%
mineral fertilizer N or 75% mineral N + Cerealine gave the lowest ones.
Application of IAA + T4 gave the longest roots, followed by IAA + T3, on
the other wise, the lowest ones recorded with control + T1 in the first and the
second seasons.
Indole acetic acid (IAA) recorded the highest mean values of root diameter in
comparison with control treatment (spray water) which recorded the lowest
ones in both seasons.