Productivity Response of Some Soybean Genotypes to Abiotic Stresses

The study aimed to investigate the effect of some abiotic stresses on some vegetative growth characteristics of soybean (Glycine max (L.) Merr.) throughout growing ten soybean genotypes under sandy and saline soils conditions and water stress by skipping one day of drip irrigation under sandy soil conditions from flowering stage up to harvest. As a result of salinity, plant height, numbers of green leaves and branches/plant, as well as, leaves fresh weight decreased considerably as compared to sandy soil condition over all soybean genotypes with a reduction of 54.6, 67.7, 54.1 and 75.4%, respectively. Highly significant differences among soybean genotypes were obtained under sandy and saline soil conditions for all the studied vegetative growth characteristics except for plant height under sandy soil condition in 1998 season.Combined data of 1999 and 2000 seasons, showed significant differences among soybean genotypes for total dry weight at 45 days from sowing and for all the studied vegetative growth characteristics at 90 days from sowing and for most the studied yield components except for biological, pods and seed yields/acre, seed yield/m2 and seed yield/plant.