The Effect of Diet Composition on the Digestibility and Fecal Excretion of Phosphorus in Horses: A Potential Risk of P Leaching?

摘要: The main horse phosphorus excretion pathway is through the dung. Phosphorus originating from animal dung and manure has harmful environmental effects on waters. number of horses increased in many countries, several studies have pointed that leaching P paddocks pastures are hotspots for high losses. hypothesis was feeding regimes might influence digestibility feces, therefore impact husbandry. A experiment conducted with six fed forage-based diets to study utilization feces. method a total collection experimental design arranged as an unbalanced 6 × 4 Latin Squares. intake increasing concentrate intake. All studied resulted positive balance and, retention differed zero all except only-hay diet, which lower compared other diets. varied 2.7 11.1%, supplementing forage-diets concentrates slightly improved (p = 0.024), it also digestibilities crude protein 0.002) organic matter 0.077). excreted average 20.9 ± 1.4 g/d Excretion smallest (20.0 g) hay-only diet 0.021). daily 7.6 kg per year. soluble part feces accounted about 88% vulnerable runoff losses may leach into Thus, pose potential risk environment if not properly managed, less than farm animals. Supplementation inorganic should be controlled mature light work decrease