[Chemical composition of 6 unconventional plants from Oaxaca State, Mexico, as potential resources for animal feed].

Characteristics and distribution of six plants are described. The chemical composition and in vitro digestibility of leaf and stem of Polymnia maculata, Trigonospermum annuum, Buddleia parviflora Kunt, Canna indica L, Gnaphalium oxyphyllum y Saurauia scabrida Hensl., selected for farmers information, were analysed as a potential resources in animal feeding. The results in dry matter: Crude protein (%): Go and Ss 10.9, Bp 16.7, Pm 11.7 and Ta 11.3. Cell wall (%): Go 54.1, Ss 52.3, Ci 54.4, Bp 68.3, Pm 27.8 and Ta 30.9. Lignin (%): Go and Ss 16.6, Ci 15.5, Bp 10.4, Pm 10.6 and Ta 13.3. IN vitro dry matter digestibility (%): Go 55.1, Ss 37.6, Ci 55.4, Bp 46.5, Pm 82.4 and Ta 81.4. Calcium and phosphorus (mg/100g) respectively: Go 1095 and 379, Ss 1132 and 387, Ci 600 and 421, Bp 800 and 855, Pm 1146 and 421 and Ta 905 and 480. Tannic acid (mg/100g): Go 1450, Ss 1480, Bp 575, Ci 518, Pm 3329 and Ta 2760. Trypsin inhibitor (UIT/g): Go 22264, Ss 29720, Bp 755, Ci 4228, Pm 931 and Ta 4412. Hemagglutinins were detected in Pm and Ta. Alkaloids were detected as scarce in Bp, Ci and Pm, moderate in Ta. Saponins and Cyanogenic glucosides were not detected. It is concluded that Pm and Ta could be considered as a forage for ruminants; Go, Bp and Ci as a complement; recommended the voluntary intake, in vivo digestibility and weight increase trials.