Effect of Dietary Supplementation with Biologically Treated Sugar Beet Pulp on Performance and Organs Function in Goat Kids

摘要

Due to the importance of roughages in ruminant diets, the possibility of improving its nutritive value by biological treatments should be explored. Sixteen goat kids were used to evaluate the effects of diets containing different levels of fungal (Trichoderma viride)-treated SBP on growth performance, blood metabolic profile indicating for liver, kidney and endocrine functions and rumen fermentation. The animals were distributed randomly on four equal feeding trials, lasting for 120 days: replacementof concentrate feed mixture (CFM) by 0% (R_1) as control, 0.3% (R_2), 0.6% (R_3) and 0.9% WAV (R_4) treated-SBP. Kids weights were recorded at the beginning of experiment and thereafter biweekly till the end of experiment. Blood sera were analyzed at zero-time and at the end of the experimental period for some serum biochemical parameters and metabolic hormones. Ruminal fluid samples were collected at the end of experiment from all kids. The highest values of daily body gain (g), total body weight gain(kg), dry matter intake(g/h/d) and feed conversion (Kg DMI/Kg gain) were recorded for goats in the trial R_4 compared to other groups. There were no significant (P>0.05) differences in serum levels of glucose, total cholesterol, triglycerides, HDL, LDL,AST, ALT, urea and creatinine among all trials. Metabolic hormone assay revealed that thyroid hormones (TSH and T3) and IGF-I significantly (P<0.05) elevated for goats in trials R_3 and R_4 compared with R_2 and R_1, while T_4 and insulin did not affected. Ruminal fluid pH significantly (P<0.05) decreased, while TVF acids and NH_3-N concentrations were significantly (P<0.05) higher for goats fed the treated rations; R3 and R4 than the R2 and control ones. It was concluded that fungal-treated SBP as supplement in CFM can improve nutritive value of rations and had beneficial effects on the performance and metabolic hormones of goat kids. However, less than 0.6% in CFM seems to be ineffective.