Effects of different selenium fertilizers and spraying periods on fruit quality of'Huizao'jujube
[Objective]The aim was to clarify the appropriate selenium fertilizer and selenium spraying period,so as to provide reference and suggestions for improving the fruit quality of'Huizao'jujube and cultivating selenium-rich'Huizao'jujube products in Xinjiang.[Method]With'Huizao'jujube as the test material,three selenium fertilizer formulations of sodium selenite(A1),organic selenium-enriched nutrient agent(A2)and nano-selenium fertilizer(A3)were used to spray selenium on the leaves of'Huizao'jujube in three application periods of young fruit+expansion period(B1),expansion period+white ripening period(B2)and young fruit+white ripening period(B3).The external quality(single fruit mass,longitudinal diameter,transverse diameter,fruit shape index),internal quality(VC,protein,soluble solids,soluble sugar,titratable acid,flavonoids,total phenols)and mineral element content(C,N,P,K,Ca,Mg,Se)were measured.Through variance analysis and correlation analysis,the effects of different selenium fertilizer formulations and selenium spraying periods on the quality of'Huizao'fruit were explored.[Result]Under different selenium fertilizer treatments,three kinds of selenium fertilizer treatments significantly reduced the single fruit mass,longitudinal diameter,Ca content and Mg content of jujube.A1 had the most significant effect on improving the internal quality indexes of jujube fruit.A3 had the most significant effect on increasing the content of C,N and Se in jujube fruit.Under different selenium spraying periods:B1 and B3 treatments significantly reduced the single fruit mass and longitudinal diameter of'Huizao'jujube;B2 treatment had a significant effect on improving the internal quality indexes and Se element content of'Huizao'jujube.Under the interaction of the two treatments:after the application of A3 in the three periods,the single fruit mass,longitudinal diameter and transverse diameter of'Huizao'were significantly reduced the application of A1 in the B2 period significantly improved the internal quality of'Huizao';the application of A2 and A3 in B2 period significantly increased the content of N and Se elements.[Conclusion]Sodium selenite(A1)of three selenium fertilizers had the best effect on improving the internal quality of'Huizao'fruit,and nano-selenium fertilizer(A3)had the best effect on improving the mineral element content of'Huizao'fruit.Among the three selenium spraying periods,the expansion period+white maturity period(B2)was the best selenium spraying period.All selenium application schemes significantly increased the selenium content of jujube.All selenium treatments significantly increased the selenium content of'Huizao fruit,which was 6-20 times higher than that of CK,up to 0.06-0.20 mg/kg,which met the selenium-rich food standards and food safety standards.In summary,it is recommended to use sodium selenite foliar spraying method to cultivate selenium-enriched grey jujube during fruit expansion period+white maturity period.
'Huizao'jujubeseleniumfruit qualitymineral elements
NETL
NSTL
万方数据
