笔者日前从北京市种子管理站获悉,去年以来,该站已成功引进黑花生、黑玉米、黑小麦等32个黑色粮经作物新品种,获得了很好的试验效果。但在推广中,农民却不买账。同样是特色农产品,房山区的红小豆种植规模已 Recently, the author learned from Beijing Seed Management Station that since last year, the station has successfully introduced 32 new black grain crops such as black peanut, black corn and black wheat, and obtained good test results. However, in the promotion, farmers do not buy it. The same is the characteristics of agricultural products, Fangshan District, the size of red bean cultivation has been