Effect of seaweed extract treatment on the quality of Summer Black grape
Using Summer Black grape as experimental material,the effects of different spraying times of sea-weed extract on the quality of Summer Black grape were studied to determine the best spraying times of sea-weed extract to provide reference for the planting and quality improvement of Summer Black grape.After spra-ying 0.25%seaweed extract every 10 days on young fruit clusters after flowering for a total of 5 times,the weight of single fruit,fruit shape index,the content of tannin,vitamin C,soluble solids,titratable acid and total sugar,and color difference value were measured,and one-way ANOVA and correlation analysis were conducted.The results showed that compared with control,spraying 0.25%seaweed extract increased the sol-uble solids content,total sugar content,the sugar-acid ratio by 0.56%,35.71%-74.69%,31.27%-73.35%,respectively.The content of vitamin C was significantly increased by 7.03%after one spray.When seaweed extract was sprayed twice,the content of titrable acid and tannin decreased by 12.90%and 86.34%,respec-tively.In terms of color,L∗,a∗,h°and CIRG values increased,b∗ and C∗ values decreased.In terms of fruit characteristics,the single fruit weight was increased by 4.17%when spraying once.Fruit shape index,peel hardness and pulp hardness was decreased by 2.06%-3.31%,0.77%-18.85%,and 1.02%-25.51%,re-spectively.The transverse diameter and longitudinal diameter were increased by 4.23%and 1.54%,respec-tively when spraying seaweed extract for three times.The correlation analysis showed that fruit weight,fruit shape index,tannin,vitamin C,soluble solids,titrable acid,total sugar and color difference were correlated to some extent.Applying 0.25%seaweed extract to Summer Black grape for 1-3 times could improve the nutri-tional value and fruit quality of grape fruit,providing theoretical basis and technical guidance for the quality and high yield of Summer Black grape.
万方数据
维普
