作物学报2024，Vol.50Issue(5)：1341-1350,10.DOI:10.3724/SP.J.1006.2024.34147
氮钾减量配施对甘薯产量和品质的影响
Effect of reducing nitrogen and potassium application on yield and quality in sweet potato
摘要
Abstract
Based on the soil fertility and fertilization level in the Chongqing region,to ensure the stable and high-quality crop yields,we explored the effects of reducing nitrogen and potassium application on sweet potato yield,quality,nutrient utilization,and soil fertility,in order to determine whether there is any space for reducing fertilizer application in sweet potatoes in this area and propose the appropriate reduction application strategy.Field experiments were conducted in two consecutive years from 2021 to 2022 at the base of the Potato Crops Research Institute of Southwest University in Xiema Street,Beibei District,Chongqing.Double factor randomized block experimental design was adopted with three levels of nitrogen and potassium applied in this study.The conventional N application rate was 126.00 kg hm-2(A1),the N application rate was reduced by 10%(A2)and 20%(A3),respectively.The conventional application amount of K2O was 96.00 kg hm-2(B1),the application amount of K2O was reduced by 5%(B2)and 10%(B3),respectively.The results showed that moderate N and K2O reduction combined application would not significantly reduce the yield of sweet potato,but reducing N by 20%significantly reduced the number of sweet potato per plant,and the yield of A3 significantly reduced by 9.25%compared to A1.Compared to the control,the soluble sugar content of A2 and A3 significantly increased by 0.25%and 0.36%,respectively,while B3 significantly increased by 0.47%compared to B1.How-ever,it was unfavorable to the starch content and soluble protein content of sweet potato.Therefore,compared with local conven-tional N and K2O fertilizer application,both reducing N by 10%(A2,119.70 kg hm-2)and K2O by 5%(B2,86.40 kg hm-2)did not significantly decrease the yield of Yushu-198 and soil enzyme activity,which could be recommended as the appropriate fertilization recommendation for sweet potato production in this region.关键词
甘薯/氮钾肥减量配施/产量品质/土壤肥力Key words
sweet potato/reducing nitrogen and potassium fertilizer application/yield and quality/soil fertility引用本文复制引用
杨春菊,唐道彬,张凯,杜康,黄红,乔欢欢,王季春,吕长文..氮钾减量配施对甘薯产量和品质的影响[J].作物学报,2024,50(5):1341-1350,10.基金项目
本研究由重庆市创新与应用研发重点项目(cstc2021jscx-gksbX0022),中央高校基本科研业务专项(XDJK2020B032,XDJK2021 F001)和重庆市现代农业产业技术体系创新团队项目(CQMAITS202303)资助.This study was supported by the Technology Innovation and Application Development Key Project of Chongqing(cstc2021 jscx-gksbX0022),the Fundamental Research Funds for the Central Universities(XDJK2020B032 （cstc2021jscx-gksbX0022）
XDJK2021 F001),and the Chongqing Modern Agricultural Industry Technology System(CQMAITS202303). （CQMAITS202303）
