生长年限对兰州百合种球品质的影响OA

[Objectives]The paper aimed to establish quality evaluation system in Lanzhou lily(Lilium brownii var.viridulum),the correlation between growth year period and bulbs quality was acquired to guide the production and management of Lanzhou lily.[Methods]Appearance quality,elementary nutrients and nutritional chemical compositions(phenolic compounds and amino acids)were detected in Lanzhou lily bulbs growing for 3-7 years(Y3,Y4,Y5,Y6,Y7)which were harvested in the early spring.[Results]Lanzhou lily bulbs were bright white with slight yellowness.And lily bulbs contained moderate water content,were abundant in starch,protein,soluble sugars and dietary fiber,as well as 10 phenolic compounds including ursolic acid with highest level and 19 amino acids(AA).3-6 years growth period greatly affected the quality of lily bulbs.With the extension of growth period,lily bulbs significantly increased year by year,by 1.67-2.68 times compared with Y3.b*value significantly decreased by 1.44%-3.50%in color,so the whiteness was improved.In addition,the contents of starch and phenolic compounds significantly decreased,soluble sugar,fructose and AA contents were dramatically elevated,and the ratio of soluble dietary fiber(SDF)to insoluble dietary fiber(IDF)remarkably increased too.The correlation analysis showed that the growth period was positively significantly correlated with soluble sugar and negatively significantly correlated with phenolic compounds.Principal component analysis demonstrated that the content of starch and phenolic compounds with high level were in Y3;Y4 had large size,more AA and protein;while Y5 and Y6 were bigger in size,and richer in AA and fructose.[Conclusions]With the growth period prolonging,Lanzhou lily bulbs grew larger,which promoted the economic benefits.And bulbs quality such as the color,sweetness,umami and taste were improved.However,the reduction of phenolic compounds weakened the medicinal quality.It was recommended that the suitable growth period was 5 years for lily produce.