一、选用良种选当地种植面积较大、适宜加工出口、市场畅销的优良品种。如属长山药型的地方主栽品种大毛山药,该品种植株生长旺盛,耐肥水,抗逆性强,块茎生长快,茎粗4~6厘米,茎长60~100厘米,单株块茎质量1.5~2.6千克,大块茎达3千克,皮薄,肉细嫩,色白多汁,淀粉含量15%,口感好,在本地常年加工出口日本、韩国等国家,深受消费者青睐。二、整地与施肥宜选择地势高燥,排灌方便,不易受涝,土壤 First, the selection of good selection of local planting area larger, suitable for export processing, selling the best varieties of the market. In the case of the long-yam-type local cultivars Da Mao yam, the variety grows vigorously, has good resistance to fertilizer and water, has strong resistance to tuber growth, has a stem diameter of 4 to 6 centimeters and a stem length of 60 to 100 centimeters and a tuber mass of 1.5 ~ 2.6kg, big tuber up to 3kg, thin skin, delicate meat, juicy color, starch content of 15%, good taste, perennial processing in the local export Japan, South Korea and other countries, favored by consumers. Second, land preparation and fertilization should choose high terrain, irrigation and drainage convenience, easy to be affected by waterlogging, soil