ABSTRACT

Rev. Latinoamer. Quím. 38, (1), 58-67, (2010)

CONTENIDO DE SUSTANCIAS ANTINUTRICIONALES DE MALEZAS USADAS COMO FORRAJE

Dora Marina Gutiérrez ^a *, Daniela Ortiz ^a , Georgina Muñoz ^a , Moustapha Bah ^a y Valentina Serrano ^b

^a Laboratorio de Productos Naturales, Facultad de Química, ^b Herbario Dr. Jerzy Rzedowski (QMEX), Facultad de Ciencias Naturales. Universidad Autónoma de Querétaro. Cerro de las Campanas s/n Querétaro 76010, Querétaro México.
Correspondencia a: Dora Marina Gutiérrez Avella (442) 1921267 (5565). Fax: (442) 1921302 domagu@uaq.mx

The main antinutritional factors (tannins, saponins, and phytates) and haemolytic activity of 13 fodder weeds used as animal feed in rural areas of the state of Querétaro, Mexico, were studied. A wide variation was observed for phytates (0.47−4.48 g/100 g of dry plant material as phytic acid equivalent), tannins (0.08−5.1 g/100 g of dry plant material as tannic acid equivalent), and saponins (0.092−1.5 g/100 g of dry plant material as diosgenin equivalent). At the concentrations evaluated, Sanvitalia procumbens showed the highest haemolytic activity, though this value fell into the safe range. However, according to the results obtained, Desmodium mollicum and Amaranthus hybridus, that had high contents of tannins and phytates, may both be less accepted by animals, and affect their health.

Key words: weeds, antinutritional factors, tannins, saponins, phytates.