Abstract:

Abstract: 【Objective】The study was conducted to investigate the effects on Extract of Lespedeza bicolor (LBE) of abatage performance、lipid metabolism and immune organ growth of Broilers【Method】A total of 500 one-day healthy Avian broilers of commercial strain were randomly assigned to ten treatment with five replicates. The experimental stage is forty-two days. The control group (CK) were fed basal diet, group 1 to 3 were fed basal diet supplemented with 90,100,110 mg/kg of Lespedeza Bicolor crude extract, group 4 to 6 were fed basal diet supplemented with 60,70,80 mg/kg of ethyl acetate extract, group 7 to 9 were fed basal diet supplemented with 60,70,80 mg/kg of n-butanol extract. 【Result】The result showed (1) there was no effect on abatage performance with supplementing LBE(P﹥0.05); (2) supplemented ethyl acetate extract and n-butanol extract of Lespedeza bicolor extract had some adjustment effect, supplement 70mg/kg n-butanol extract can significant degrade LDL-C level of serum 31.09% of 3 week, supplemented 110 mg/kg of Lespedeza Bicolor crude extract can significant degrade LDL-C level of serum 36.70% of 6 week; supplemented 80mg/kg of ethyl acetate extract and 60mg/kg n-butanol extract can significant elevate liver’s MDH activity of 6 week,43.98% and 36.96%; (3) supplemented ethyl acetate extractive and n-butanol extract of LBF can significant elevate Thoracic index and Bursa index(P<0.05), supplemented 80 mg/kg of n-butanol extract elevate 31.09% and 37.61% of Thoracic index and Bursa index in 6 weeks’ age broilers.