اثرات تنش شوری بر عملکرد و اجزای آن و میزان جذب پتاسیم و سدیم و نسبت آن ها در سه رقم سویا

A factorial experiment with a randomized complete block design with three replications carried out in 1387 in greenhouse of faculty of agriculture in Tabriz university to evaluated effects of sodium chloride salinity (zero, 3, 6 and 9 dS m) on the yield and its components and absorption of potassium and sodium and its ratio, of three soybean cultivars (L17, Zan and Williams). The results of analysis of variance showed that soybean yield and its components were affected by salinity and cultivars. But the interaction of cultivars×salinity was not significant. Mean comparisons indicated that with increasing salinity, seed number per plant, seed weight and grain yield significantly reduced compared to control. Among the varieties, L17 had more number of seeds per plant but less seed weight in comparison with others. While, williams had the highest seed weight. The lowest number of seeds per plant and grain yield was obtained in Zan. Williams and L17 had no significant difference in grain yield. The result showed that the potassium and sodium concentration decreased and increased with increasing salinity, respectively. Also, the ratio decreased. This decreasing in salinity of 3, 6 and 9 dS m was 54, 79 and 87% compared to the control, respectively. Among cultivars, L17 had highest level of potassium and Zan had highest level of sodium. The highest and lowest of was observed in L17 and Zan, respectively. This result showed that L17 is resistant and Zan is susceptible cultivars in salinity stress.