不同浓度多效唑对甘薯生长特性及产量的影响

Effects of Paclobutrazol at Different Concentrations on the Growth and Yield of Sweet Potato

以万薯5号为试验材料,采用叶面喷施方法,按照喷施浓度设置4个处理,研究多效唑的不同喷施浓度对甘薯生长特性及产量的影响。结果表明,喷施一定浓度的多效唑能够促进甘薯的基部分枝数,抑制甘薯主蔓长度和主茎粗的增长,抑制甘薯地上部分藤叶的生长,对地下部分的影响则表现为促进甘薯块根的膨大,提高甘薯的干物质率;当喷施浓度过高时,对甘薯地上部分的抑制作用减弱,甚至低于不喷施多效唑的水平,对地下部分的促进作用也转为反向抑制作用,甘薯鲜薯产量低于对照,且差异显著,甘薯干物质率比对照降低。

The effects of different spraying concentrations of paclobutrazol on growth characteristics and yield of sweet potato were studied with Wanshu No.5 as experimental material.The results showed that spraying certain concentration of paclobutrazol could promote the number of basal branches,inhibit the growth of main stem length and stem diameter,and inhibit the growth of some vine leaves aboveground,the effect on the underground part is that the root tuber of sweet potato is expanded and the dry matter rate of sweet potato is increased;when the spraying concentration is too high,the inhibition on the aboveground part of sweet potato will weaken,even lower than the level without spraying paclobutrazol,the yield of fresh sweet potato was lower than that of the control,and the difference was significant.The drying matter rate of sweet potato was also lower than that of the control.