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1 国内外青贮玉米生产现状青贮玉米是指将果穗和茎叶都用于家禽、家畜的青贮饲料的玉米品种,是世界上用于生产奶、肉等副食产品重要的饲料来源。据Anon统计,1988年欧洲种植的青贮玉米面积达3.3×10~6hm~2,青贮玉米已达到玉米总种植面积的80%左右:加拿大1991年超过198 450hm~2,现每年种植1.9×10~6hm~2的青贮玉米;美国1990年生产的青贮玉米价值总额为15亿美元,每年种植青贮玉米的面积在2.3×10~6hm~2至4.6×10~6hm~2之间,占玉米总种植面积的12%。目前我国受原有粮食生产政策的影响,全株青饲玉米量极少,主要以粮食玉米品种为主。近些年来,随
1 Status of Silage Corn at Home and Abroad Silage corn is a maize variety that uses ear and stems and leaves both for silage of poultry and livestock, and is an important source of feed used in the world for producing non-staple food products such as milk and meat. According to Anon statistics, the area of silage corn planted in Europe reached 3.3 × 10 ~ 6hm ~ 2 in 1988 and silage corn has reached about 80% of the total planting area of corn. In 1991, Canada surpassed 198 450hm ~ 2, and 1.9 × 10 ~ The silage corn produced in 1990 in the United States has a total value of 1.5 billion U.S. dollars and the area of silage corn planted annually is between 2.3 × 10-6 hm 2 and 4.6 × 10-6 hm 2, 12% of the area. At present, China is affected by the existing grain production policies. There is only a small amount of whole-plant green-forage corn, which is mainly dominated by grain and corn varieties. In recent years, with