Effect Of Chinese Herbal Medicine Additive On Growth Performance And Immune Function In Sansui Duck

The experiment was designed to study the impact of different Chinese herbal feed additives on growth performance, antioxidant capacity and immune function, and serum biochemical indexes of Sansui duck, so as to provide a data for the application of herbal feed additives in duck production. Herbal feed additives were divided into two components—FormulaⅠ: Astragali Radix, Shenqu, Citri Reticulatae Pericarpium, Glycyrrhizae Radix Rhizoma, Dioscoreae Rhizoma, Schisandrae Chinensis Fructus, Cinnamomi Cortex, Mume Fructus; FormulaⅡ: Foeniculi Fructus, Eucommiae Cortex, Atractylodis Macrocephalae Rhizoma, Hordei Fructus Germinatus, Houttuyniae Herba, Crataegi Fructus, Citri Reticulatae Pericarpium, Zingiberis Rhizoma.300 Sansui ducklings of one-day-old were selected randomly and divided into five groups:the control group, groupⅠ, groupⅡ, groupⅢ and groupⅣ. Each group includes 3 replicates and each replicate had 20 ducks.The control group was fed with the basal diet, groupⅠwas fed with the basal diet added 1 % herbal formulaⅠ, groupⅡadded 1.5 % herbal formulaⅠ,groupⅢ added 1 % herbal formulaⅡ, and groupⅣ added 1.5 % herbal formulaⅡ. The rearing environment of the experimental group and the control group were exactly the same. All duckings were injected with bird flu vaccine before the test started. During the test, the pool water would be changed every three days. The pens were swept and disinfected regularly,and kept clean, dry and ventilated. All the ducklings took food and dronk freely. The daily food intake and health status were recorded.The experimental duration was 120 days. Growth index was measured by feeding trials. And blood biochemical parameters, indicators of immune function and antioxidant capacity index were measured by the wing vein blood at the age of 60 days and 120 days old. Test results were as follows:(1) Adding Chinese herbal feed additives can improve the growth performance of Sansui duck. At the age of 3 to 11 weeks, the testⅠ, Ⅱwas significantly higher(P <0.05) in terms of weight gain; Compared to the control group, the group Ⅲ, Ⅳ gain weight diversely but insignificantly. Absolute week weight gain in each group were slightly different at each stage, the relative weight gain tended to decrease between all the groups. Average daily gain of the group Ⅱ was significantly higher(P <0.05). groupⅠ, group Ⅳ also improved, but no significance(P> 0.05) and group Ⅲ decreased. Compared with the control group, the group Ⅰ, Ⅳ significantly increased average daily feed intake(P <0.05), group Ⅱ, Ⅲ daily group were also slightly higher in intake, but the difference was not significant(P> 0.05). FCR somewhat was lower than the control group, but the difference was not significant(P> 0.05). Studies have shown that 1.5 % of the basal diet herbal formula Ⅰ, improve ADG and ADFI of Sansui duck at the of age3 to 11 weeks simultaneously and effectively.(2) Adding Chinese herbal feed additives can improve the antioxidant capacity of Sansui duck. Herbal feed additives could significantly increase serum glutathione peroxidase(GsH-Px). Opposed to the control group, the content of serum GsH-Px of the test groupⅠ,Ⅱ was significantly higher(P <0.05); the test group Ⅲ, Ⅳ increased slightly, but the difference was not significant(P> 0.05). Super oxide dismutase(SOD) activity also had improved. Compared with the control group, the serum SOD level of each group were significantly increased(P <0.05); while adding herbal feed additives could significantly reduce Sansui duck blood malondialdehyde(MDA) concentration level(P <0.05).(3) Adding Chinese herbal feed additives can improve immune function of Sansui duck. Opposed to the control group, the serum IgA level of the each groupⅡ,Ⅲ, Ⅳ, were significantly increased 10.41 %, 8.75 %, 9.71 %(P <0.05); the groupⅠwas slightly higher, but the difference was not significant(P <0.05);the serum IgG content of each group were significantly higher than the control group. Compared with the control group, the serum IgG content of the group Ⅰ, Ⅱ, Ⅲ, Ⅳ werw significantly increased 9.25 %, 17.98 %, 9.07 %, 8.99 %(P <0.05);the serum IgM content of the group Ⅱ, Ⅲ were significantly increased(P <0.05);the serum IgM content of the group Ⅱ improved most obvious among other groups. The serum total protein content of the test group Ⅳwas significantly higher(P <0.05), and increased by 9.62%.The serum total protein content of the test groupⅡincreased by 8.85 % significantly(P <0.05).The serum albumin levels of each test group were increased more significantly than the control group. serum albumin level was significantly higher in group Ⅱ(P <0.05), and a 16.60 % increase.(4) Adding Chinese herbal feed additives for serum biochemical indicators have different effects on each experimental group of Sansui duck.When at the age of 60 days and 120 days,the TG levels of the test groupⅢ, Ⅳ,compared to the control group, decreased 32.76 %, 23.53 % significantly(P <0.05);the total cholesterol(TC) content was significantly different( P < 0.05); the low-density lipoprotein cholesterol(LDLC) levels were significantly lower(P> 0.05);the high-density lipoprotein cholesterol(HDLC) of the test group Ⅲ,Ⅳwere of significant difference(P <0.05).When at the age of 120 days, compared to the control group, the serum LDLC content of the test groupⅡdecreased significantly.