In order to study the effect of phosphorus fertilization rates and microelements spraying treatments on plant
characteristics and yield traits as well as some seed chemical properties of faba bean varieties, an experiment
was conducted in two successive growing seasons of 2018/2019 and 2019/2020 in the Farm of Agricultural
Research and the Experimental Center of Faculty of Agriculture at Moshtohor, (Toukh Directorate, Kalyubia
Governorate) Benha Univ. Egypt. The experimental design was split-split plot in RCBD in three replications.
Phosphorus fertilizer was considered as the main plot in three rates (0, 15 and 30 kg P2O5/fed). Four
microelements spraying treatments [Tap water (control), Zn, Mn and mixed of Zn + Mn] were arranged in the
sub plot. The sub-sub plots were occupied with three faba bean varieties (Giza 716, Nubaria 3 and Sakha 4). The
obtained results could be outlined as following: Increasing phosphorus fertilizer rate from 0 to 30 kg P2O5/fed
induced significantly increased most vegetative growth, yield attributes, yield and seed chemical properties of
faba bean under study except, mid physiological maturity, height to 1st pod and phosphorus use efficiency were
significantly decreased with rising phosphorus rates during the both seasons. The foliar spray by Zn and Mn as a
single or in combination had significant effect on most faba bean traits under study compared with no
microelements added during the both seasons. Faba bean plant treated with microelements foliar spray using Zn
in combination with Mn was the most effective treatment for most faba bean characteristics in the both seasons.
Mean performances of the investigated faba bean varieties for most faba bean traits under study were significant
different during the both seasons. Faba bean variety Sakha 4 had higher values of chlorophyll content index at 85
DAS, plant height, height to 1st pod, No. of branches/plant, plant weight, No. of pods/plant, No. of seeds/plant,
seed yield/plant, biological yield/fed, seed yield/fed, straw yield/fed, phosphors use efficiency, seed N content
and seed protein yield/fed in the both seasons. While, Nubaria 3 variety significantly gave the maximum mean
values in mid physiological maturity, harvest index and 100-seed weight in the both seasons, respectively. The
first order interactions between treatments 30 kg P2O5/fed × Zn + Mn, 30 kg P2O5/fed × Sakha 4 and Zn + Mn ×
Sakha 4 as well as the second order interaction between treatments 30 kg P2O5/fed × Zn + Mn × Sakha 4 were
significantly recorded the maximum seed yield/plant, biological yield/fed, seed yield/fed and straw yield/fed in
the both seasons. Therefore, this study recommends that Sakha 4 variety treated by 30 P2O5/fed and mixed
spraying with Zn 0.3 % + Mn 0.3 % in order to improve the production of faba bean under the condition of
Toukh Directorate, Kalyubia Governorate, Egypt.
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