甘薯膨大素是一种新型植物生长调节剂。经2年在全国66个点试验示范10万亩,平均增产鲜薯26.4%,晒干率提高1.6%,投入产出比为1:60—90。使用技术:①栽前浸苗,每亩用膨大素5g,兑清水5kg,溶解后薯苗分批将基部1—2节置溶液内浸6小时,即 Sweet potato enlargement is a new plant growth regulator. After 2 years in 66 points across the country to test the demonstration of 100000 acres, an average increase of 26.4% of fresh potato, sun drying rate increased by 1.6%, input-output ratio of 1: 60-90. The use of technology: ① planted soaking seedlings, per acre swollen with prime 5g, against water 5kg, dissolved in batches of potato seedlings in batches of 1-2 base solution immersion 6 hours, that is