华北农学报2016，Vol.31Issue(5)：199-204,6.DOI:10.7668/hbnxb.2016.05.030
高肥力土壤氮钾配施对鲜食型甘薯产量及品质的影响
Effects of Combined Application of Nitrogen and Potassium Fertilizer on Yield and Quality of Fresh-eating Sweet Potato in Soil with High Fertility
摘要
Abstract
To explore the effect of potassium(K)and nitrogen (N)on yield and quality of tuber of sweet pota-to YS25 in soil with high fertility,used two factors of three levels completely randomized block design of experi-ment,with 3 N treatments(0,45,90 kg /ha)and 3 K2 O treatments (0,75,1 50 kg /ha),included 9 combinations of K and N treatments,were designed.The results showed that:High fertility soil nitrogen fertilizer could be added sweet potato vine length,shoot fresh weight,T /R value(Ratio of fresh weight of stem and leaf to fresh weight of un-derground),and improve the tuber of sweet potato protein,glucose and sucrose content and high fertility soil nitro-gen fertilizer situation and root dry mass of fresh,the content of starch and fructose decreased.K fertilizer could sig-nificantly increase the root fresh and dry weight,potato rate and starch and glucose content;promote the sweet potato of Mg absorption,decreased the uptake of Ca by sweet potato.In nitrogen and potassium interaction conditions,sweet potato branching number,tuber number and Vc,protein,sucrose,glucose,fructose content with no fertilizer treat-ment were improved compared;fresh tuber yield and N fertilizer and potash fertilizer application interaction,namely when no N and K2 O 1 50 kg /ha,sweet potato yield reached the highest,with no fertilization treatment increased 1 0 825.5 kg /ha,an increased of 29.2%.At the same time in the implementation of N 90 kg /ha,without K2 O,the sweet potato yield was lowest,compared with no fertilization treatment was 1 435.5 kg /ha,a declined of 3.9%. Therefore,in the high fertility soil,the high yield and good quality of fresh edible sweet potato should be obtained by the application of no or less nitrogen fertilizer and the appropriate amount of potassium fertilizer.关键词
鲜食型甘薯/高肥力/氮钾配施/产量/品质Key words
Fresh-eating sweet potato/High fertility soil/Potassium application combined with nitrogen/Yield/Quality分类
农业科技引用本文复制引用
王萌,房增国,梁斌,曾路生,李俊良..高肥力土壤氮钾配施对鲜食型甘薯产量及品质的影响[J].华北农学报,2016,31(5):199-204,6.基金项目
山东省薯类产业创新团队栽培与土肥岗位项目 （）
