The preliminary study on salt tolerance of different alfalfa varieties

NaCl was used as stress factor, six alfalfa varieties were treated with 0, 0.3%, 0.5%, 0.7% and 0.9% NaCl, and the salt tolerance was tested by measuring potentiality of germination, the germination rate, plant height, root length, soluble sugar content and MDA content of Medicago sativa plants. The results indicated that the potentiality of germination and the germination rate were decreased, and the plant height and root length were shortened, but soluble sugar content was increased with the increasing of NaCl concentration. The comprehensive evaluation showed that Xinmu No.1 was the most salttolerant, and Aohan was the weakest salttolerant.