A field study was carried out at the Experimental Farm Station of Faculty of Agriculture, Moshtohor, Benha University, Kalubia Governorate, Egypt, during the successive summer seasons of 2016 and 2017. This experiment was conducted to study the effect of foliar application with lithovit at 250 and 500 mg/l and amino acids at 2 and 4 ml/l on some growth aspects, biochemical constituents, anatomical and yield characteristics of soybean plants cv. Giza 111. The obtained results indicated that foliar application with lithovit at a rate of 500 mg/ L and amino acids at a rate of 4 ml/l caused significant increases in all vegetative growth characteristics expressed as plant height, stem diameter, number of leaves/ plant, total branches/plant, total leaf area/ plant, shoots fresh and dry weights g/plant and specific leaf weight/plant as compared with the control treatment. Data also indicated that the application of lithovit at a rate of 500 mg/l and amino acids at 4 ml/l treatments gave the highest values of photosynthetic pigments (chlorophyll a, b and carotenoids), phytohormones concentration and leaf chemical compositions (N, P, K, Ca, Mg %, Fe ppm, total carbohydrates, crude protein %) as well as enhancing leaf and stem anatomical features of soybean plant. Also, the obtained results showed that foliar application with lithovit at 500 mg/l and amino acids at 4 ml/l treatments caused significant increases in flowering and yield characteristics i.e., number of flowers/plant, number of setted pods/plant, pods yield/plant, number of seeds/pod, weight of seeds/pod, 100 seeds weight, weight of seeds/plant (g) in the two growing seasons as well as seeds oil percentage and unsaturated fatty acids % as compared with the control.
Generally, it could be concluded that foliar application with growth stimulators as lithovit at 500 mg/l and amino acids at 4 ml/l could be recommend in soybean cultivation for improving its growth, productivity and quality.
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