西北农业学报2025，Vol.34Issue(9)：1607-1616,10.DOI:10.7606/j.issn.1004-1389.2025.09.004
硅肥对甘薯薯块产量形成的影响研究
Effects of Silicon Fertilizers on Tuber Yield of Sweet Potato
摘要
Abstract
To investigate the regulatory effect of exogenous silicon fertilizer on sweet potato storage root yield,this study selected 'Yanshu 25'(Y25) and 'Yanshu 29'(Y29)as analyzing varieties and arranged treatment groups consisted of water-soluble siliceous fertilizer 500x liquid(H2SiO3,SiO2≥27％),which was set for spraying treatment(P),irrigating treatment(G)and combined spraying and irrigating treatment(P+G),and sodium silicate solid fertilizer(Na2SiO3·9H2O,AR)irrigating treatments integrated with three rates for 90 kg/hm2(T9),180 kg/hm2(T18)and 360 kg/hm2(T36).Using a two-year field and pot investigation experiment,with a check treatment received no silicon fer-tilizer supplement,we investigated and compared the storage root yield and yield components at har-vest and the condition of storage root during storage period,and made researches on the biomass accu-mulation of top and root at early growing stage,anatomical observation on sweet potato tuber at root differentiation,and expression characteristics of IbEXP1 gene associated with tuber root formation among different treatment groups.The field experiment results offered the initial evidence to the im-provement effect of silicon fertilizer application on the sweetness and the storage tolerance of sweet potato fresh root,and there were different degrees of higher total soluble solid of fresh root among dif-ferent silicon fertilizer treatments at canopy closure period(50 days after planting)and harvest stored for 60 days.The water-soluble siliceous fertilizer 500x liquid spraying treatment(P)had significantly increased storage root yield,but had no obvious difference in valid tuber root number per plant com-pared with the control group(CK)at harvest between two sweet potato varieties.Meanwhile,P treat-ment possessed higher average fresh mass per root,the proportion of medium-sized root and their con-tribution to the final root tuber yield,which contributed to the uniform in size of storage root.P treat-ment significantly increased storage root yield by 14.06％(Y25)and 6.84％(Y29)compared with CK.Pot assisted experiment among the distinctive different treatment groups had show that Yanshu 25 under P treatment grew best,which had the most aboveground biomass,total root biomass,T/R ratio,the more leaf area per plant,main stem,and absorbed root biomass.Its root diameter was the biggest owing to initial thickening occurred at 30 days after planting,and laid foundation for final stor-age root yield.Meanwhile,G treatment and T36 treatment possessed the less absorbed root biomass at early growing stage,the silicification of epidermal cells of young roots at 15 days after planting,and the highest expression characteristics of IbEXP1 gene at 30 days after planting.The above conditions negatively regulated root thickening,and that was unfavourable for field production of sweet potato.关键词
甘薯/硅肥/薯块/解剖观察/IbEXP1基因Key words
Sweet potato/Silicon fertilizer/Storage root/Anatomical observation,IbEXP1 gene引用本文复制引用
刘秀云,辛国胜,原文刚,王翠娟,刘旭凤..硅肥对甘薯薯块产量形成的影响研究[J].西北农业学报,2025,34(9):1607-1616,10.基金项目
国家甘薯产业技术体系烟台综合试验站项目(CARS-10) （CARS-10）
湖北省重点研发项目(2023BBB052). The earmarked fund for China Agriculture Research System-10-Sweetpotato(No.CARS-10) （2023BBB052）
the Key Research and Development Project of Hubei Province(No.2023BBB052). （No.2023BBB052）
