早在公元12世纪时,寇宗奭在本草衍义中(?)提到:“山药即薯蓣也,长沙山谷中有之”。可见长沙(今之望城)出产山药是有很久的历史,据说当地栽培山药也有百多年的时间。过去多作蔬菜出卖(1957年以后全部收作药用),因此,当地菜农积有丰富的培育管理经验。大多采用密植法,每亩可植山药1—1.5万蔸,比河南主产区每亩栽种约3,000蔸多2—4倍左右,亩产鲜山药5—8千斤,比河南亩产约2千斤多增加1.5—3倍。兹将其栽培方法简介如后.一、种苗来源:望城县的山药是采用两种方法繁殖的,一种是用山药块根上端二三寸的苗芽;一种是山 As early as the 12th century AD, Mou Zongtang mentioned in his book: “Yam yam is also a potato yam, and it is in the valley of Changsha.” It can be seen that Changsha (now Wangcheng) has a long history of producing yam, and it is said that the local cultivation of yam also has more than 100 years of time. In the past, more vegetables were sold (after 1957, they were all taken for medicinal purposes). Therefore, the local vegetable farm has rich experience in cultivation and management. Most of them adopt the dense planting method, and they can plant 1-155,000 pounds of yam per acre, which is about 2-4 times more than the 3,000 pounds per acre planted in the main producing areas in Henan, and produce 5-8 pounds of fresh yam, which is about 2 pounds more than the yield per mu in Henan. Increase by 1.5-3 times. The introduction of its cultivation method is as follows. I. Source of seedlings: The yams in Wangcheng County are bred in two ways. One is two or three inches of shoots with yam roots; one is mountain.