Abstract:

Abstract: 【OBJECTIVE】 This article investigate biological indicators influence rule of salt tolerance on Roegneri Seedling, provide scientific basis for Roegneri breeding, and provide fine forage resource to solute the question of northwest grassland alkalization. 【METHOD】Different concentrations of NaCl solution on the three species of Roegneria (3-leaf stage) for stress treatment 7d, measured their biological indicators such as height, root length, leaf length, leaf width, shoot fresh weight and dry weight, fresh weight of the underground sections and dry weight. 【RESULTS】Experimental studies have shown that: low-salt concentration on the three species of Roegneria biological indicators little effect on seedling; with a high salt concentration increases, the three species of Roegneria indicators are severely inhibited, and reached a very significant difference (P﹤0.01). 【CONCLUSION】Comprehensive analysis of biological indicators that the three species of salt-sensitive Roegneria seedlings: the seedling of（R. komarovii （Nevski）Nevski）exhibit the greatest salt tolerance,and the seeding of（R. turczaninovii （Drob）Nevski var. macrathera Ohwi）exhibit the worst salt sensitivity and( R. stricta Keng f. stricta) be placed in the middle.