北京口岸进口小麦种子主要是农业科研单位和农业院校科研用种,从1965年至今,每年引进品种数大约3000～15000种。从60年代进口的小麦种子,带病主要是小麦网、光腥黑穗病,麦角病,线虫病,锈病等。70年代大批量引进的墨西哥小麦带腥黑穗病十分严重。1975年对中国农科院和北京市农科院小麦生长期田间调查和室内小麦种子检验结果:中国农科院 The imported wheat seeds from Beijing Port are mainly used for scientific research by agricultural research institutes and agricultural colleges. From 1965 to the present, about 3000 to 15,000 varieties are introduced each year. Wheat seeds imported from the 1960s, the disease is mainly wheat net, Halibut disease, ergot, nematode disease, rust and so on. Mexican wheat introduced in large quantities in the 1970s was very severe with tainted ears. 1975 Chinese Academy of Agricultural Sciences and Beijing Academy of Agricultural Sciences wheat field survey and indoor wheat seed test results: Chinese Academy of Agricultural Sciences