Acta Agrestia Sinica
Research on Winter Injury and Prevent Technique of Alfalfa ( Medicago sativa L.cv.‘Aohan’)in Chifeng Region
SUN Qi-zhong, GUI Rong, HAN Jian-guo
. 2001, (1): 50 -57 .  DOI: 10.11733/j.issn.1007-0435.2001.01.009