The study was carried out at the Experimental Farm of Faculty of
Agriculture, Sohag University, Sohag, Egypt during of 2015 and
2016 seasons. The experiment amid to investigate the efficiency
of biofertilizers i.e. ( Nitrobin, Phosphorine and Potasiomag) as
an effective alternative for nitrogen, phosphorus and potassium
chemical fertilizer on okra green fruits and protein percentage.
NPK chemical fertilizers were added at four rates i.e. (43.75,
87.5, 131.25 and 175 kg N/fed.), (15, 30, 45 and 60 kg P2O5/fed.)
and (12.5, 25, 38 and 50 kg K2O/fed.), respectively. The four
rates represent 1/4, 1/2, 3/4 and the whole recommended dose of
NPK according to the Ministry of Agriculture, Egypt. Two okra
(Abelmoschus esculentus (L.) Moench) cultivars i.e. Balady and
Eskandrani were used in this study. The obtained results
indicated that there were significant differences between the two
okra cultivars and among different fertilizer treatments in most
studied characteristics in both studied seasons. The interaction
between Eskandrani cultivar and bio-fertilizers plus 3/4 NPK
significantly enhanced vegetative growth traits, green fruits yield
characteristics and its components as well as seed yield
characteristics except number of seeds/pod in both seasons.
However, the highest protein percentage recorded when
Eskandrani cultivar fertilized by recommended dose of chemical
NPK or bio-fertilization plus 1/2 NPK or bio-fertilization plus
3/4 NPK with no significant differences among them in both
seasons.