With harvesting time(pre-bloom,early bloom and mid-bloom)postponed,the alfalfa stem to leaf ratio increased,the contents of crude protein(CP) and carotene dropped while acid detergent fiber(ADF) and neutral detergent fiber(NDF) increased significantly(P<0.05) under different drying ways(suncured,65℃ drying in the lab and 120℃ drying).The contents of ashuncured,calcium and phosphorus had no significant difference.From above nutritive content,it can be concluded that pre-bloom is the best period for harvestin...