Abstract

RUIZ LOPEZ, Mario Alberto; RODRIGUEZ MACIAS, Ramón  and  NAVARRO PEREZ, Sonia. CHEMICAL-NUTRITIONAL EVALUATION OF Lupinus exaltatus ZUCC. FROM NEVADO DE COLIMA, MEXICO, AS A POTENTIAL SOURCE FORAGE. INCI [online]. 2006, vol.31, n.10, pp.758-761. ISSN 0378-1844.

With the purpose of studying the forage potential of Lupinus exaltatus, neutral detergent fiber (NDF), acid detergent fiber (ADF), non-protein nitrogen (NPN), alkaloids and in situ digestibility of seed, foliage, mature pod and whole plant were evaluated in samples from el Nevado de Colima, Mexico. Seed protein content was 38.41 ±0.48% with digestibility of 70 ±3.0% and levels of NPN of 1.0 ±0.02%, but high alkaloid content (2.1 ±0.05%). Likewise, foliage showed a protein content of 23.5 ±0.9% and fiber content of 26.5 ±1.2%, NDF of 55.3 ±1.7 and ADF of 34.8 ±0.8%, as well as the highest organic matter digestibility (60.0 ±2.3%) and the lowest levels of NPN (0.6 ±0.01%) and alkaloids (1.0 ±0.018%). The whole plant had similar values as foliage. Pods were the lowest in protein content (8.5 ±0.3%) and protein digestibility (26.0 ±1.2%), but the highest in fiber content (52.4 ±0.3%), NDF (84.1 ±3.0%) and ADF (76.5 ±2.8%), and showed low percentages of NPN (0.2 ±0.004%) and alkaloids (0.78 ±0.02%). Lupinus exaltatus is a good protein source, particularly seeds and foliage, and therefore could be a potential alternative in ruminant diets after alkaloids are reduced or eliminated by physical methods.

Keywords : Alcaloides ; Fibra ; Forraje ; Lupino Silvestre ; Lupinus exaltatus .