甘薯52—7由著名甘薯专家雷书声等人经有性杂交选育而成。1994年10月20日至24日,由山东省农科院、河北省农科院、中国科学院等组成的专家组,先后对河南汝州、上蔡、周口、商水、商丘和睢县等地的52—7进行了取点测产考察,经专家组现场验收,鉴定52—7具有四大突出特点: 1,鲜产特高。各点的种植情况表明。52—7具有很大的增产潜 Sweet potato 52-7 by the famous sweet potato expert Ray and other people through sexual cross breeding. From October 20 to October 24, 1994, an expert group composed of Shandong Provincial Academy of Agricultural Sciences, Hebei Academy of Agricultural Sciences, Chinese Academy of Sciences and so on successively met Henan Yuzhou, Shangcai, Zhoukou, Shangshui, Shangqiu and Yixian To 52-7 carried out the point of test production inspection, the scene acceptance by the expert group, identification 52-7 has four prominent features: 1, fresh produce extraordinarily high. The planting of each point indicates. 52-7 has a great yield potential