0引言青贮玉米是世界上用于生产奶、肉等副食产品重要的饲料来源,已成为反刍家畜的主要日粮和奶牛、育肥肉牛的强化饲料,属于粗饲料之首。世界上畜牧业发达的国家都很重视青贮玉米的种植和生产,玉米青贮是一项早已成熟的技术,欧洲青贮玉米占玉米种植面积的80%左右,目前欧美畜牧业发达 0 Introduction Silage corn is an important feed source in the world for producing non-staple food products such as milk and meat. It has become the main diet and dairy cow for ruminants and the intensive feed for fattening beef cattle. The world’s husbandry in developed countries attach great importance to the cultivation and production of silage corn, corn silage is a mature technology, the European corn silage accounts for about 80% of the acreage, the current animal husbandry in Europe and the United States developed