Abstract

Soybean (Glycin max (L.) Merr), from the legume’s family has an important place among the industrial plants in the world. It’s a summer plant and faced the heat and drought season During the growing season, its greatly affect soybean yield. Drought stress is one of the most important environmental factors in reducing the growth and yield of many crops, especially in arid and semi-arid regions of the world. The foliar application of the nutrient elements increases the yield, quality, resistance to pests and diseases and resistance to drought stress. A field experiments was carried out at the Agricultural Experimental Station of the Agriculture Research Centre at Iraqi -mahallah during summer seasons of 2016 and 2017 to study the effect of foliar application of Ca Zn, B, N, P, k Amino acid and water on growth, yield and quality of two soybean cultivars under normal and water stress conditions. Result showed the effect of foliar application year on plant height, pod number per plant, seed number per pod and grain yield was significant. the highest grain yield (4021.91kg ha^-1) achieved B application in 2017.

The lowest grain yield (237.41kg ha^-1) was obtain in 2016 and control treatment, also there was no significant difference between control treatment and water application in two year of experiment. The result showed in 2017 there was no significant difference in treatment in seed protein content. also, there was no significant difference between foliar application and control in seed oil content in 2016. Also, two cultivars have significant different in grain yield in 2017. But there was no significant difference in two cultivars in 2016. In general, results showed that spray application of nutrients, especially B application, improves the yield and yield component (number of pods, number of seed, 1000-seed weight and grain yield) in normal and drought stress.

Keywords: Grain yield; Irrigation; Nutrition; Seed oil; Seed protein