几种块根膨大剂对甘薯主要经济特性的影响

Effects of Several Root Swelling Agents on Main Economic Characteristics of Sweet Potato

[目的]筛选最适宜重庆地区甘薯生产上应用的块根膨大剂.[方法]以甘薯品种“豫薯13”为研究对象,在栽插后47～59 d喷施块根膨大剂矮脚虎、多效唑、国光膨大、绿肽尔块大,以喷施清水为对照,探讨4种块根膨大剂对甘薯生长的生长调控能力及对其产量和其他经济特性的影响.[结果]喷施矮脚虎后鲜薯产量、商品薯产量、薯干产量均比对照显著增产,藤叶产量与对照相当;而喷施国光膨大后薯干产量和藤叶产量比对照显著降低.4种处理的薯块干物率比对照显著下降.[结论]在重庆地区,矮脚虎较适宜用于甘薯生产上的藤蔓徒长田控制.

[ Objective] The research aimed to screen out the most suitable root swelling agent in the production of sweet potato in Chongqing. [ Method] Taking sweet potato variety ＂Yushu 13＂ as test materials, 4 kinds of root swelling agents （Dwarf Tiger, paclobutrazol, Guoguang En- largement, ＂Lvtaier Kuaida＂ ） were sprayed after transplanting 47 ~ 59 d with spraying clean water as control. The regulation of 4 kinds of root swelling agents on the growth of sweet potato and their effects on the yield and other economic characters of sweet potato were discussed. [ Re- sult ] The weight of fresh potato, commercial potato and dried potato of sweet potato that were sprayed with Dwarf Tiger were significantly in- creased than that of CK, and its vine weight was corresponding to that of CK. The weight of dried potato and vine weight of sweet potato that were spayed with Guoguang Enlargement were significantly decreased than that of CK. The drying rate of potato tuber in four treatments all significantly decreased that that of CK. [ Conclusion] Dwarf Tiger was the most suitable for controlling the vine growth in the production of sweet potato in Chongqing.