Proximate, Mineral and Anti-nutrient Contents in Psophocarpus tetragonolobus (L) DC. (Winged Bean) Leaves

摘要

The leaves of Psophocarpus tetragonolobus (L) DC . (Winged bean) was evaluated for the proximate, mineral and anti-nutritional composition. Atomic absorption spectrometry was used in determination of the leaves for Phosphorus, Potassium, Magnesium, Calcium, Iron and Zinc. Anti-nutritional factors (ANFs) including tannin, oxalate and phytate were also determined using appropriate technique. The results of proximate analysis indicate that the leaves had high crude protein (26.29%), moisture (75.29%), dry matter (24.71%), ether extract (4.10%), crude fibre (10.04%), and ash (5.08%). Mineral analysis indicate the Psophocarpus tetragonolobus leaves contained some essential mineral such as K+ (0.84%), Ca2+ (0.30%), P (0.34%), Mg (0.40%), Fe2+ (181.66 mg/kg) and Zn (61.27 mg/kg). The leaves of P. tetragonolobus have low concentration of ant- nutritive factor. Phytate (1.35%), Oxalate (1.12%) and Tannin (0.02%) respectively. The overall results suggest that P. tetragonolobus leaves is of high nutritional quality due to high Crude protein and mineral contents with low presence of anti-nutritional factors.