Nutritional Composition and Edible Safety of Passiflora edulis'Tainong 1'
[Objective]The effects of frame cultivation patterns on the nutritional composition,heavy metals,and pesticide residues of Passiflora edulis fruit were explored to provide the scientific basis for the centralized utilization of water,fertilizer,pesticides,and other materials and the selection of planting patterns.[Method]Taking Tainong No.1 as the research object,the frame pattern was used as the planting density of 166 plants/667m2.The botanical characteristics of the plants were described referring to Flora of China.National standard detection methods were used to determine the fruit moisture,ash,protein,starch,total acid,vitamin C,total flavonoids,superoxide dismutase(SOD),potassium,magnesium,zinc,manganese,calcium,amino acids,carbendazim,cypermethrin,lambda-cyhalothrin,chlorothalonil,lead and cadmium,and the safety of heavy metals and pesticide residues was evaluated.[Result]Tainong No.1 was featured with cylindrical stem,papery leaves,palmately 3-lobed,smooth outer skin,purple or purplish red fruit,and fragrant aroma.The content of protein,total flavonoids,vitamin C,calcium,magnesium and zinc were relatively high,respectively at 2.85 g/100g,12.73 mg/100g,21.80 mg/100g,89.0 mg/kg,152.0 mg/kg and 3.3 mg/kg.A total of 16 amino acids were found,among which glutamic acid was the highest at 320 mg/100g.Lysine was the first limiting amino acid.The essential amino acid content,non-essential amino acid content and semi-essential amino acid content were respectively 381 mg/100g,760 mg/100g and 140 mg/100g,accounting for 29.75%,59.32%and 10.93%of the total amino acid separately.Meanwhile,the ratio of essential amino acid to non-essential amino acid was 50.13%.No pesticide residues such as carbendazim,chlorothalonil,cyfluthrin,or lambda-cyhalothrin were detected,while no heavy metal lead was detected.The cadmium content was below the limit value and was within the safe range.[Conclusion]Tainong No.1 has stable plant traits.When it is planted in different directions around the frame,the space utilization is high,the orchard is well ventilated and illuminated,the fruit is nutritious,no pesticide residues have been detected,and it is not contaminated by heavy metals.It is safe to eat.
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