Effects of Plant Tannin Extracts Supplementation on Animal Performance and Gastrointestinal Parasites Infestation in Steers Grazing Winter Wheat
نویسنده
چکیده
Twenty-six stocker cattle (286.1 ± 25.7 kg) were used to quantify the effect of commercial plant tannin extracts (control vs. mimosa and chestnut tannins) on animal performance, gastrointestinal parasites control and plasma metabolite changes in heifers grazing winter wheat forage (Triticum aestivum L. var. “cutter”). The forage biomass and crude protein content were generally similar among treatments. Initial live-weight (LW) was similar among treatments, although final LW (P = 0.1) and average daily gain (ADG; P < 0.01) differed. Logarithmic (log) fecal egg counts (FEC) for Haemonchus contortus was higher (P < 0.02) for mimosa tannins group than for control group, and chestnut tannins group was intermediate in cattle grazing wheat forage on day 35. Logarithmic FEC for Ostertagia was lower (P < 0.05) for chestnut tannins group than for both control and mimosa tannins group on day 41. However, log FEC for Cooperia was lower (P < 0.04) for mimosa tannins than for both control and chestnut tannins group. Blood parameters were similar among treatments, except cholesterol level on day 70. Blood cholesterol level was higher (P < 0.02) for chestnut tannins group than for control, and intermediate for mimosa tannins. However, cholesCorresponding author.
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