Effects Of Chinese Herb Feed Additive On Performance, Serum Biochemical Parameters And Meat Quality In AA Broilers

The study was conducted to investigate the effects of3kinds of chinese herb heedadditive on performance, blood biochemical parameters and meat quality in AA broilers.2801-day-old AA mixed-sex broilers were randomly allotted into7treatments with4replicates in each treatment, with10broilers in each replicate. The trail period was42days.Ⅰ-Ⅵ test wasoffered control diet(maize-soybean meal) respectively supplemented with1%mixed herb1,2%mixed herb1,1%mixed herb2,2%mixed herb2,1%mixed herb3and2%mixed herb3. The results were showed as follows:1、Growth performance: the AA chickens on average daily gain （ADG）(1-42d), thecontrol group and the group IV was significantly higher than that in group Ⅲ(P<0.05).Average daily feed intake (ADFI) in the whole period was the group Ⅱ highest, but amongthe groups was not significant(P>0.05). Feed/Gain (F/G) in the whole period was thecontrol group lowest, but differences between groups not significant(P>0.05). The first halfperiod of ADFI (1-21d) and latter half period of ADFI (22-42d) was respectively group Ⅳand group Ⅱ highest, but among groups did not reach significant levels(P>0.05). The firsthalf period of ADG and latter half period of ADG was respectively group Ⅱ and groupⅣhighest, but among groups did not reach significant levels(P>0.05). The first half period ofF/G and latter half period of F/G were the group Ⅳ lowest, but differencesbetween groupsnot significant(P>0.05).2、Serum Biochemical Parameters: the latter half period of serum total cholesterolthan (TC) was the group Ⅳ highest, and significantly higher than that of the control groupand group I(P<0.05), Ⅰ-VI of each experimental group were significantly higher thecontrol group(P<0.05); the latter half period of serum high density lipoprotein cholesterol(HDLC) levels reached the highest level in group Ⅴ, and compared with the other sixgroups differences significant(P<0.05); the latter half period of serum triglyceride (TG)and low-density lipoprotein cholesterol (LDLC) between groups were not significantdifferences(P>0.05). The first half period of serum biochemical parameters in broilers, theserum TG levels of group Ⅴ was the highest and with group Ⅳ at the same level, and thanthe other five groups significantly different(P<0.05), the group IV was significantly highergroup Ⅰ and Ⅱ and Ⅵ(P<0.05); the serum TC content of group Ⅵ was the highest and with group Ⅰ, II and Ⅴ at the same level, and than the other three groups differencessignificant with(P<0.05); serum LDLC content of group Ⅵ was significantly with highgroup Ⅳ(P<0.05); the level of serum HDLC between groups did not reach significantdifference(P>0.05).3、Meat quality(1) nutrients: the first half period of breast muscle and the latter half period of thighmuscle protein content were in mixed herb3(group Ⅴ and Ⅵ) reached the highest level,and was significantly differences than other groups(P<0.05), and each test group weresignificantly higher the control group(P<0.05); the first half period of thigh muscle and thelatter half period of breast muscle protein content of each group were not significantdifferences(P>0.05). The first half period of breast muscular fat content among the groupsthe differences were not significant(P>0.05); the latter half period of breast muscular fatcontent is group I the highest, but each test group and control group no significantdifference(P>0.05); the first half period of thigh muscular fat content was group Ⅳ thehighest, and group Ⅱ, Ⅲ, Ⅳ and Ⅴ was significantly higher than control group(P<0.05);the latter half period of the thigh muscular fat content among groups were not significantdifference(P>0.05). Breast muscular dry matter content of group II was the highest, withgroup Ⅲ and group Ⅴ at the same level, and were significantly different than the controlgroup(P<0.05); the latter half period of the breast muscular dry matter content of groupⅠwas the highest level and significantly different than group Ⅲ(P<0.05); the first half andlatter half period of thigh muscular dry matter levels of each group were not significantlydifferent(P>0.05).(2) physical and chemical character: the first half period of breast muscular pH valueof control group and Ⅳ group was significantly higher than the groupⅠ, II and Ⅴ(P<0.05);the first half period of thigh muscular pH values of the control was significantly higherthan groupⅠand Ⅱ(P<0.05); the latter half period of thigh muscular pH value of group Ⅱwas significantly lower than the other six groups(P<0.05); the first half period of breastand thigh muscular shear force that the difference between groups was not significant(P>0.05). The latter half period of breast and thigh muscular shear force of the controlgroup was the lowest, and significantly different than the group Ⅳ and Ⅴ(P<0.05); thefirst half period of breast and thigh muscular water loss rate among groups were notsignificantly different(P>0.05). the latter half period of breast muscular water loss rate isthe highest in group Ⅳ, with groupⅠ at the same level, relative to the other five groupdifferences significant(P<0.05); the latter half period of the thigh muscular water loss rateat the highest level of group II and III were significantly different than the control group and the group Ⅵ(P<0.05), and group Ⅰ was significantly higher than controlgroup(P<0.05). the first half period of breast muscular flesh a value of groupⅤwassignificantly higher than control group(P<0.05), b value of group Ⅲwas significantlyhigher than control group and group Ⅵ(P<0.05), L value of group VI was significantlylower than the other six groups(P<0.05); the latter half period of breast muscular flesh aand b values of each test group were not significantly different than control group(P>0.05),L value of group Ⅳ and Ⅴ at the same level, but the group Ⅳ compared to other fivegroup differences significant(P<0.05); the first half period of thigh muscular flesh a valueof group VI was significantly higher than group II and IV(P<0.05), the b value of group Ⅱ,Ⅲ, Ⅴ and Ⅵ were significantly higher than control group(P<0.05), the L value of thecontrol group, group II and III were significantly higher than group Ⅳ and Ⅴ(P<0.05). thelatter half period of thigh muscular flesh a value of group Ⅴ significantly lower than groupI, II, III and VI(P<0.05), and b values of group Ⅲ, Ⅳ and Ⅵ were significantly higherthan control group(P<0.05), L value of groupⅤ was significantly higher than group II andⅥ (P<0.05), the control group and the group IV was significantly higher than group Ⅵ(P<0.05).(3) antioxidant indicators: the first half and latter period of thigh musclemalondialdehyde (MDA) content were the control group reached the highest level and thedifference with the test group was significantly(P<0.05); the first half period of breastmuscle MDA content that between groups were not significantly different(P>0.05). thelatter half period of breast muscle MDA content of the control group was the highest level,and with the differences of each test group were significantly(P<0.05), and the lowestcontent was group Ⅵ, and significantly different than group Ⅲ(P<0.05). The first halfperiod of thigh muscle superoxide dismutase (SOD) activity in the control group was thehighest level, and with group Ⅳ at the same level, relative to the other five test groupdifferences were significant(P<0.05); the highest and lowest level of the latter half periodof thigh muscle SOD content was respectively group Ⅱand group V, and the differencebetween the two groups was significant(P<0.05); the first half period of breast muscleSOD levels that between groups were not significantly different(P>0.05). The latter halfperiod of the breast muscle SOD content in the control group reached the highest level,with each test group differences significant(P<0.05).(4) the umami substances: the first and latter half period of the ADP+AMP contentthat the test group was not significantly different than the control group(P>0.05); the firsthalf period of thigh muscle ADP+AMP content of group Ⅵ was the highest, and with thecontrol group, group Ⅲ and Ⅴ differences were significant(P<0.05); the latter half period of the thigh muscle ADP+AMP content of each test group were not significantly differentthan control group(P>0.05); the first and latter half period of breast muscle IMP content ofeach test group were not significantly different than control group(P>0.05); the first andlatter half period of breast muscle HxR+Hx content of each test group were notsignificantly different than control group(P>0.05); the first half period of thigh muscleHxR+Hx that the content of group Ⅳ and Ⅵ was significantly higher than control groupand group III(P<0.05); the latter half period of thigh muscle HxR+Hx content of group IIand Ⅵ were the highest level, and with the control group and group Ⅴ differences weresignificant(P<0.05).