xcessive use of nitrogen fertilizers on vegetable crops has negative effects on human health.
There is need to rationalize and reduce nitrogen consumption in cultivated plants, especially
after its high price. Two greenhouse experiment were executed through the two winter growing
seasons of 2022/2023 and 2023/2024 under plastic greenhouses at the Vegetable Research Farm,
Faculty of Agriculture, Benha University to study the effect of different rates of mineral and bio
nitrogen fertilizer in addition foliar fertilization with some different growth stimulants, namely
Clacium and boron, Potassium Phosphide, Seaweed Extract, MAP on vegetative growth, chemical
content of leaves, yield and its quality of cucumber. The treatments were the interaction between
three N-fertilizer , i.e., T1- 100% RDN, T2- 80% RDN + Bio fertilizer (Nitrobein), T3- 60% RDN +
Bio fertilizer (Nitrobein), and five sources of growth stimulants , i.e., Calium and boron at 2 ml / l,
MAP at 2 g / l, Seaweed extract at 2 ml / l, Potassium phosphide at 2 g / l. and Control. Results
showed that, adding all amount of nitrogen as 100% in mineral then spray the plants with Calium and
boron at 2 ml/l exhibited the highest values in plant height and leaves area during the two seasons of
study. In conclusion, the best treatment concerning increasing early yield, number of fruits per plant
and total fruit yield per plant was 100% RDN and sprinklethe plants with “Calium and boron at 2
ml/l” followed by the best treatment concerning increasing total fruit yield per plant was “80% RDN
+nitrobien” and spray the plants with the same stimulant “Calcium and boron at 2 ml/l” in both
seasons.