不同株行距对甘薯生长和产量性状的影响

摘要

Under the experimental conditions of row spacing 0. 8 ～ 1.0 m and plant spacing 0. 15 ～0. 25 m in Hainan province,the effects of nine different plant - row spacing treatments on the growth and yield characters of short - vine type sweet potato variety Guangshu 79 were studied. The results showed that widening row spacing was advantageous to improve the number of base branches,fresh root weight per plant, dry matter rate, yield of dry root slice and starch yield. Reducing plant spacing was propitious to improve the yield of fresh root and dry root slice; on the other side, widening plant spacing was advantageous to improve the number of base branches, root number per plant, fresh root weight per plant and the proportion of big and medium roots. Among 9 treatments, 0. 8 m × 0. 15 m plant - row spacing treatment harvested the highest fresh root yield, and (0. 9 ～ 1.0 m) × (0. 15 ～0.20 m) plant - row spacing treatments harvested higher yield of dry root slice and starch yield.%在0.8～1.0 m行距和0.15～0.25m株距条件下,采用9种不同株行距配置方式,在海南省种植短蔓型甘薯品种广薯79,结果表明:加宽行距有利于提高分枝数、单株鲜薯重、干物率、薯干产量和淀粉产量;缩小株距有利于提高鲜薯产量和薯干产量;加宽株距有利于提高分枝数、单株结薯数、单株鲜薯重和大中薯比率.在9个处理中,0.8 m×0.15 m株行距配置方式收获最高的鲜薯产量,(0.9～1.0 m)×(0.15～0.20m)株行距配置方式获得较高的薯干产量和淀粉产量.