甘薯是卢龙县的主栽作物，为了进一步提高甘薯产量，实现甘薯生产的产业化，1996年从河南引进了868甘薯优种，由于表现良好，受到群众欢迎。至1997年已推广到全县各乡镇。甘薯868为绿秧，红皮白肉，食味面甜，有如板栗；大薯率高，结薯集中，鲜薯淀粉率24％左右，较当地品种一 Sweet potato is the main crop in Lulong County. In order to further increase the production of sweet potato and realize the industrialization of sweet potato production, in 1996, 868 sweet potato superior species was introduced from Henan Province and was welcomed by the masses due to its good performance. To 1997 has been extended to all towns and villages throughout the county. Sweet potato 868 is green seedling, red white meat, sweet taste of sweet taste, like chestnut; big potato rate, potato concentration, fresh potato starch rate of about 24%