[Objective] To investigate the representative indexes of sprouts period for alfalfa under alkaline stress preliminary and provide a reference for screening Alkali-resistant alfalfa varieties.[Method] Using randomized grouping design method,A total of 16 typical alfalfa varieties were selected.In different alkaline concentrations,the correlation of 8 indexes including total fresh weight,buds fresh weight,root fresh weight,total length,buds length,root length,germination rate and germination energy were studi...