Energy and protein content of tedera (Bituminaria bituminosa).

Nutrient content was determined in tree subspecies of Biturninaria bituminosa [also called Psoralea bituminosa): crassiuscula, albornzaginata and bituminosa collected in Canary Islands in autumn, spring, winter and summer. Crude protein content ranged 15-20% and NDF content ranged 41-56%. In vitro OM digestibility ranged 55-65%. Based on digestible OM content of subspecies, estimated net energy content ranged 4.6-5.3 MJkg DM, with not significant differences among subspecies neither season.