Proximate, Mineral and Anti-nutrient Contents in Psophocarpus tetragonolobus (L) DC. (Winged Bean) Leaves
J. A. Alalade *
Department of Animal Health and Production, Oyo State College of Agriculture and Technology, P.M.B. 10, Igbo Ora, Oyo State, Nigeria.
J. A. Akinlade
Department of Animal Production and Health, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Oyo State, Nigeria.
O. A. Aderinola
Department of Animal Production and Health, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Oyo State, Nigeria.
A. N. Fajemisin
Department of Animal Production and Health, Federal University of Technology, P.M.B. 704, Akure, Nigeria.
T. O. Muraina
Department of Animal Health and Production, Oyo State College of Agriculture and Technology, P.M.B. 10, Igbo Ora, Oyo State, Nigeria.
T. A. Amoo
Department of Home Rural and Economics, Oyo State College of Agriculture and Technology, P.M.B.10, Igboora, Oyo State, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
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.
Keywords: Psophocarpus tetragonolobus, anti-nutritional factors, proximate and mineral.