凤豆4号（8462）是我所1983年从江苏太仓新毛豆中优选出的自然变异单株，经系统选育法育成的高产、抗病、适应性强的蚕豆新品种，1994年7月经云南省作物品种审定委员会审定推广。产量表现1987～1988年参加大理州5个试点蚕豆新品种区域试验，两年7个试点平均亩产295．76公斤，居 Fengyu No.4 (8462) is a high-yielding, disease-resistant and adaptable new broad bean cultivated in our country by the method of systematic breeding which was selected by our institute in 1983 from the new soybean in Taicang, Jiangsu Province. In July 1994, Yunnan Crop Variety Approval Committee to promote. Yield performance In 1987 ~ 1988 to participate in five pilot areas of Dali State pilot new varieties of beans, 7 pilot two years average yield per mu 295.76 kilograms,