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1991年,在天镇县东沙河村村民富有顺的甜菜地里进行了单粒种纸筒育苗移栽试验,用塑料小弓棚纸筒育苗苗床土选用5年未种过甜菜的麦茬上和腐熟的马粪,过磷酸钙2.5～3
In 1991, a single-seed paper-tube seedling transplanting experiment was conducted in the rich beet land of villagers in Dongshahe village, Tianzhen county. The experiment was conducted on the nursery stock with 5-year unbleached beet and the matured Horse manure, superphosphate 2.5 ~ 3