Poljoprivreda, Vol. 14 No. 1, 2008.
Izvorni znanstveni članak
SUPPLEMENTAL ACTIVATED CHARCOAL AND ENERGY INCREASE INTAKE OF MEDITERRANEAN SHRUBS BY SHEEP AND GOATS
Jozo Rogošić
; Odjel za ekologiju, agronomiju i akvakulturu, Sveučilište u Zadru,Zadar,Hrvatska
Sažetak
Utilization of the Mediterranean shrubby vegetation is often limited by secondary compounds, such as terpenes, which at too high concentrations can adversely affect forage intake and animal health. Ingesting compounds such as activated charcoal and energy can ameliorate the negative effects of secondary compounds and enable animals to eat more shrubs. Thus, our objectives were to determine if supplemental charcoal, energy and numbers of shrub species offered influenced intake of shrubs by sheep and goats. We conducted three experiments each with 12 lambs and 12 kids (6 activated charcoal vs. 6 controls). In the first experiment, we initially offered three shrubs (Juniperus phoenicea, Helichrysum italicum and Juniperus oxicedrus),) then in the second one, two shrubs (Juniperus phoenicea and Helichrysum italicum), and finally one shrub (Juniperus phoenicea) in the third experiment. In all three experiments (Exp. 1, P<0.001; Exp. 2, P < 0.0003 and Exp. 3, P < 0.03), supplemental charcoal and energy had a positive effect on total shrub intake for both lambs and kids. Kids ate more shrubs than lambs did in all three experiments (P<0.01). Regardless of experiment, both species of animals showed a numerical decrease in total shrub intake, with or without supplemental charcoal and energy, as the number of shrub species on offer decreased. Our findings support the hypothesis that biochemical diversity plays an important role in diet selection, thus enabling animals to better meet their nutritional needs and avoid toxicity.
Ključne riječi
activated charcoal; biodiversity; kids; lambs; diet selection; Mediterranean maquis; secondary compounds; terpenes
Hrčak ID:
25882
URI
Datum izdavanja:
17.7.2008.
Posjeta: 1.888 *