Comprehensive Evaluation of the Effect of Seaweed Fertilizer on Loquat Fruit Quality Based on Principal Component Analysis
[Objective]To explore the effects of seaweed fertilizer on the quality of loquat fruit.[Method]Using 3-year-old'Dawuxing'loquat as material,the effects of 0,450,650,850,and 1 050 times diluted seaweed fertilizer on the quality of loquat fruit were studied.[Result]Foliar application of sea-weed fertilizer could increase the single fruit weight,longitudinal diameter,transverse diameter and fruit shape index,and reduce the fruit hardness.Dilutions of seaweed fertilizer ranging from 450 to 1050 times result in increases single fruit weight and transverse diameter of loquat fruit by 7.02％-23.48％and 15.75％-22.73％,respectively.Compared with the control,the contents of soluble sugar,ratio of soluble solid to titratable acid,carotenoid,total phenol and total flavone in loquat fruits were increased by spray-ing seaweed fertilizer.The contents of soluble sugar and total flavonoid were significantly increased by 10.90％-13.53％and 19.84％-30.37％after treatment with 450-850 times diluted seaweed fertilizer.The ratio of soluble solid to titratable acid was significantly increased by 8.72％-20.82％with the dilution of 650-850 times seaweed fertilizer,the carotenoid was increased by 11.07％-11.79％with the dilution of 450-650 times seaweed fertilizer,and the total phenol content was increased by 32.29％-47.46％with the dilution of 450-1 050 times seaweed fertilizer.Principal component analysis was used to comprehen-sively evaluate the improvement effect of seaweed fertilizer on loquat fruit quality.Four principal compo-nents with eigenvalues greater than 1 were extracted,and the cumulative contribution rate reached 80.954％,which were mainly summarized into three aspects:fruit shape and size,color and flavor.According to the comprehensive scores,the effectiveness of seaweed fertilizer on improving loquat fruit quality was ranked as follows:was ranked as follows:650 times seaweed fertilizer dilution＞850 times seaweed fertilizer dilution＞450 times seaweed fertilizer dilution＞1 050 times seaweed fertilizer dilution＞control.[Conclusion]Seaweed fertilizer dilution of 450-1 050 times can improve the appear-ance quality of loquat fruit,enhance the flavor quality,and increase the nutrient content,among which the effect of seaweed fertilizer dilution of 650 times is the best,followed by seaweed fertilizer dilutions of 450 times and 850 times.
万方数据
维普
