title: Oxalate Content of Taro Leaves Grown in Central Vietnam.
abstract: Leaves were harvested from four different cultivars ofColocasia esculentaand three cultivars ofAlocasia odorathat were growing on nine different farms in central Vietnam. The total, soluble and insoluble oxalate contents of the leaves were extracted and measured using HPLC chromatography. Total calcium determinations were also carried out on the same samples. The total oxalate content of the leaves ranged from 433.8 to 856.1 mg/100 g wet matter (WM) while the soluble oxalate ranged from 147.8 to 339.7 mg/100 g WM. The proportion of soluble oxalate ranged from 28% to 41% (overall mean 35%) of the total oxalate content of the leaves. The equivalent insoluble oxalate proportion ranged from 59% to 72% of the total (overall mean 65%). There was little difference between theColocasia esculentaandAlocasia odorataro cultivars, although the total oxalate content was significantly higher inAlocasia odoracultivars. The overall mean total calcium content was 279.5 mg/100 WM and the percentage of insoluble calcium bound as calcium oxalate ranged from 31.7% to 57.3% of the total calcium content (overall mean 47.1%). The oxalate content in taro leaves is a major factor to consider when different cultivars of taro are recommended for human or animal consumption.
authors.affiliation: Faculty of Animal Husbandry and Veterinary Medicine, Hue University of Agriculture and Forestry, Hue city, Vietnam. duthanhhang@huaf.edu.vn.
authors.forename: Hang
authors.initials: H
authors.lastname: Du Thanh
authors.affiliation: Faculty of Animal Husbandry and Veterinary Medicine, Hue University of Agriculture and Forestry, Hue city, Vietnam. hai.phanvu@huaf.edu.vn.
authors.forename: Hai
authors.initials: H
authors.lastname: Phan Vu
authors.affiliation: Faculty of Animal Husbandry and Veterinary Medicine, Hue University of Agriculture and Forestry, Hue city, Vietnam. hai.vuvan@gmail.com.
authors.forename: Hai
authors.initials: H
authors.lastname: Vu Van
authors.affiliation: Faculty of Animal Husbandry and Veterinary Medicine, Hue University of Agriculture and Forestry, Hue city, Vietnam. le.ngoan@huaf.edu.vn.
authors.forename: Ngoan
authors.initials: N
authors.lastname: Le Duc
authors.affiliation: Faculty of Hospitality & Tourism, Hue University, Hue city, Vietnam. tuanle1709@gmail.com.
authors.forename: Tuan
authors.initials: T
authors.lastname: Le Minh
authors.affiliation: Food Group, Department of Wine, Food and Molecular Biosciences, Faculty of Agriculture and Life Sciences, Lincoln University, Canterbury 7647, New Zealand. Savage@lincoln.ac.nz.
authors.forename: Geoffrey
authors.initials: G
authors.lastname: Savage
keywords: calcium; calcium availability; soluble and insoluble oxalates; taro leaves; total