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四棱豆又叫翼豆,被人们誉为“绿色金子”,属多年生缠绕性草本植物。茎长3米多,因荚果四面棱状分明,故而得名。又因其荚果棱带皱边,形如翼状,故又有翼豆之称。果荚长达30厘米以上,最长可达60厘米,内含种子10～20粒。种子圆形,黄、褐、白、黑或杂色,有光泽。栽培得好每亩可产干豆100～150公斤。根部的根瘤菌有很强的固氮能力,1亩四棱豆从空气中固定的氮素相当于50公斤尿素,是新开垦地的良好先锋作物。 四棱豆全身都是宝。其种子含蛋白质高达34％,地下块茎含蛋白质也高达20％,特别
Four-winged beans, also known as wing beans, was hailed as “green gold”, is a perennial winding herb. Stem more than 3 meters, because the pods surrounded by edge-shaped, so named. Because of its pod edges wrinkled edge, shaped like a wing, so there are also known as wing beans. Pods up to 30 cm long, the longest up to 60 cm, containing 10 to 20 seeds. Seeds round, yellow, brown, white, black or mottled, shiny. Well cultivated per acre dry beans can produce 100 to 150 kg. Root rhizobia has a strong ability to fix nitrogen, 1 acre of beans fixed from the air equivalent to 50 kg of nitrogen, is a good pioneer of reclaimed land crops. Four-bean beans are all treasure. Its seeds contain up to 34% protein, and underground tubers contain up to 20% protein, especially