甘薯营养丰富 ,适应性广 ,增产潜力大 ,是世界主要粮食作物之一。在发展中国家和经济相对落后的国家 ,甘薯主要作为口粮或饲料用 ,经济价值低下。联合国也因甘薯投入少、产出多、抗灾力强、生长期灵活 ,将其视为赈灾作物。近年来 ,国际上对甘薯营养保健作用倍加重视 ,形成了食? Sweet potato is rich in nutrients, wide adaptability, large potential for yield increase, is one of the world’s major food crops. In developing countries and countries with relatively backward economies, sweet potatoes are mainly used as rations or feedstuffs, with low economic value. Because of its low investment in sweet potatoes, the United Nations has also produced more outputs, is resilient to disasters and has a flexible growth period, which is regarded as a disaster relief crop. In recent years, the international community has paid more attention to the nutrition and health care of sweet potato, forming a diet?