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我区山区丘陵面积占总面积的82%,红薯的栽培面积常年在30万亩左右,在粮食作物中面积仅次于水稻、小麦而居第三位。红薯的面积虽大但单产较低,全区常年鲜薯亩产都在2,000斤左右徘徊。其原因除种植地都是山坡岗地、沙丘河滩和“四旁”的瘠薄地外,品种严重退化,没有及时更换良种和推广先进的高产栽培技术也是原因之一。为此,我区科委情报所于1983年初组织引进了高产抗病的红薯新品系徐薯77—6和“优、
My hilly area in the mountainous area accounts for 82% of the total area. The cultivation area of sweet potato is about 300,000 mu all the year round. The area of grain crops is second only to rice and wheat ranks third. Although the area of sweet potato is large but yields are low, perennial fresh produce of whole area hovers around 2,000 pounds. The reason is that except for the planting sites are hillside posts, dune beaches and barren land on the “four sides”, the varieties are severely degenerated, and one of the reasons is that there is no timely replacement of elite varieties and promotion of advanced high-yielding cultivation techniques. To this end, our district Science and Technology Commission intelligence organizations in early 1983 to organize the introduction of high-yield disease-resistant sweet potato new line Xushu 77-6 and "excellent,