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赣榆县甘薯每年种植面积20万亩以上.1978～1982年以来持续五年高产,平均亩产量871.2斤(五折一),比1973～1977年五年平均亩产量726斤增产145.2斤,增产幅度达20%.高产的主要经验是:(一)推广良种.目前主要种植徐薯18和青农2号,搭配种植宁薯2号、群力2号.1981年良种面积占97.1%.徐薯18表现高产、高抗烂根病,青农2号表现高产、抗茎线虫病,这两个品种分别比一窝红增产鲜薯25.9%和46.2%.宁薯2号高产高干,结薯早,群力2号耐湿高产,这两个品种分别比一窝红增产鲜薯23.4%和9.4%.
The annual planting area of sweet potatoes in Ganyu County is more than 200000 mu Each year since 1978 ~ 1982 five years of high yield, the average yield of 871.2 kg (50%), than the average annual output of five years from 1973 to 1977, 726 kg yield 145.2 kg, yield The rate of up to 20%. The main experience of high yield is: (A) to promote varieties. At present, the main planting Xuzhan 18 and Qingnong 2, with planting Ningshu 2, Qunli 2. 1981, 97.1% Potato 18 showed high yield and high resistance to root rot disease, while Qingnong 2 showed high yield and resistance to stem nematode, which increased yield by 25.9% and 46.2% respectively compared with a litter of red. As early as the potato, Quliang No. 2 was wet-resistant and high-yielding, with the two varieties yielding 23.4% and 9.4% of fresh potatoes, respectively, compared with a litter of red.