The concentration of plant phenolics in meadow plants and its relation to nutritive value of fodder
2002
Komarek, P. | Mika, V. (Vyzkumny Ustav Rostlinne Vyroby, Jevicko (Czech Republic)). Vyzkumna Stanice Travnich Ekosystemu) | Pozdisek, J.
A total of 436 samples of 109 varieties of 15 species were collected from grasslands in the area of Jevicko (Czech Republic) in the period of three years. NIRSystems 6500 apparatus was used for the prediction of the index of potential negative activity of phenols (IANP) and of the parameters of fodder quality. A model experiment was carried out to test the influence of 9 meadow plants extracts on the activity of proteases and cellulases in a digestive juice. The highest IANP value was determined for Hypericum perforatum at the stage of florescence (232), the lowest for Vicia sepium at the vegetative stage (14). The IANP of meadow species was significantly higher at the florescence stage than at the vegetative stage, the influence of harvest year was significant in one case. Significant interspecific differences in IANP can be determined more often for families that exhibit higher average value of IANP (80), e. g. for Rosaceae, Hypericaceae, Asteraceae, Plantaginaceae. On the contrary, for families with an average value of IANP50, significant interspecific differences occur occasionally. A significant intraspecific variability was found out for Taxacum officinale. The addition of 9 meadow plants extracts decreased the activity of both proteases and cellulases.
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