【摘要】 以甘薯品系冀科紫18(JK274)、冀科紫19(JK142)、冀科紫20(JK7)、冀科薯21(JK147)、冀科薯576(JK576)和冀东地区主栽的甘薯品种紫罗兰、徐紫薯8号、腾飞、济薯25、普薯32号等为供试材料，分析探究不同栽植密度对这10个甘薯品种（系）的农艺性状与产量的影响，旨在为甘薯品种遴选、高质高效生产提供参考。研究采用“裂区试验设计法”，设置5个不同栽植密度水平进行试验。结果表明，随着栽植密度的增加，单株分枝数、地上部鲜重、地下部鲜重、单株蔓长与T/R值总体均呈先升高后降低的变化趋势。10个甘薯品种（系）的农艺性状在5个不同的栽培密度下具有不同的显著差异性，单株分枝数、单株结薯数、单株蔓长达极显著差异，而地上部鲜重、地下部鲜重、T/R值则差异不显著，其中冀科薯21(JK147)、腾飞、济薯25与普薯32号产量表现较好。种植密度在55555～62500株/hm~2下最为合适，实际生产应用中需根据不同甘薯品种（系）选择合适的栽培密度，才能达到高产增收、效益增加的目的。更多还原

【Abstract】 In order to provide references for sweet potato variety selection, high-quality and high-efficiency production,sweet potato species Jikezi18(JK274), Jikezi19(JK142), Jikezi20(JK7), Jikeshu21( JK147), Jikeshu576(JK576) and the main sweet potato varieties in Jidong area, Xuzishu 8, Tengfei, Jishu 25 and Pushu 32 were used as test materials to analyze the effects of different planting densities on agronomic characters and yields. The split-plot experiment design was used as the treatment,and 5 different planting density treatments were set up. The results showed that the number of branches per plant, the fresh weight of aerial parts, the fresh weight of underground parts, the length of per plant and T/R value generally increased firstly and then decreased with the increase of the planting densities. The agronomic characters of the 10 sweet potato varieties(species) had different significant differences under 5 planting densities. The number of branches per plant, the number of tubers per plant and the length of per plant were significantly different, while the fresh weight of aerial parts, the fresh weight of underground parts and T/R value were not significantly different, and Jikeshu21( JK147), Tengfei, Jishu 25 and Pushu 32 had better yields. The most suitable planting density was 55555～62500 plants/hm~2. The planting density should be selected according to different sweet potato varieties(species), in order to achieve the purpose of high yields and efficiency.更多还原