Effect of Alkaloid-saline Stress on the Seed Germination and Seedling Growth of Trifolium repens

Taking Trifolium repens new strain(‘Z005')as material,the effect of different concentration(0,20,40,80,120,160,200mmol/L)saline-alkaloid(NaCl,Na2SO4,NaHCO3,Na2CO3)stress on the seed germination and seedling growth of Trifolium repens new strain(‘Z005')were studied.The results showed that low concentration of saline-alkaloid stress(concentration was≤20mmol/L)could improve seed germination ability and seedling growth of Trifolium repens,contrastly,high concentration decreased seed germination and seedling growth.When the concentration was exceed80mmol/L,germination rate,germination potential,germination index,vigor index,root length and shoot height were significantly lower compared with control(P0.01).Seed of Trifolium repens could germinate under the condition that the concentration of saline-alkaloid below 94.50mmol/L.And saline-alkaloid stress had a higher inhibition to root length than shoot height.