有机硒和枣粉对肉仔鸡生长性能及养分利用的影响

Effects of organic selenium and jujube powderon growth performance and nutrient utilization of broilers

为探究有机硒和枣粉对肉仔鸡生长性能及养分利用的影响,试验采用2×5两因子(A、B)随机试验设计,A因子为枣粉添加水平,分别为0、8%,B因子为硒添加水平,分别为0、0.3、0.6、0.9、1.2 mg/kg。选择体重接近、健康的1日龄科宝505白羽肉仔鸡720只,随机分为10组,每组6个重复,每个重复12只鸡(公母各半)。试验期为42 d,分前期(0~21 d)和后期(22~42 d)两个饲养阶段。结果表明:有机硒和枣粉两因子间对肉仔鸡生长性能和养分利用均无显著的交互作用(P>0.05)。试验前期,A2组平均日增重显著高于A1组(P<0.05),且A2组料重比显著低于其他各组(P<0.05);添加枣粉可显著提高肉仔鸡平均日采食量和料重比(P<0.05)。试验后期,A5组平均日增重显著高于除A1组外的其他各组(P<0.05),而料重比显著低于除A3组外的其他各组(P<0.05),A4组平均日采食量显著高于A1、A2和A3组(P<0.05)。A5组总能和总磷利用率均有下降的趋势(P=0.090;P=0.078)。添加枣粉后,肉仔鸡对氮和钙的利用率均有改善(P<0.05),但总能的利用率显著下降(P<0.05)。综上,饲粮添加0.3 mg/kg硒可以提高肉仔鸡前期平均日增重,添加枣粉可改善肉仔鸡前期采食量,并提高氮和钙的利用率。

To investigate the effect of organic selenium and jujube powder on growth performance and nutrient utilization of broilers.A 2×5 two factor(A,B)randomized trial design was used and A was the level of jujube powder(0,8%),B was the level of selenium(0,0.3,0.6,0.9,1.2 mg/kg).720 healthy 1-day-old Cobb 505 white feathered broilers were randomly divided into 10 groups with 6 replicates in each group and 12 chickens in each replicate(male half).The experimental period was 42 days,which was divided into two feeding stages:starter(0~21 days)and finisher(22~42 days).The results showed that there was no significant interaction between organic selenium and jujube powder on growth performance and nutrient utilization of broilers(P>0.05).In starter of the experiment,the average daily gain(ADG)of A2 group was significantly higher than that of A1 group(P<0.05),and the ratio of feed to gain(F/G)of A2 group was significantly lower than that of other groups(P<0.05).The average daily feed intake(ADFI)and F/G of broilers were significantly increased by adding jujube powder(P<0.05).At finisher of the experiment,the ADG of A5 group was significantly higher than that of other groups except A1 group(P<0.05),while the F/G was significantly lower than that of other groups except A3 group(P<0.05),and ADFI of A4 group was significantly higher than that of A1,A2 and A3 groups(P<0.05).The energy and total phosphorus utilization of A5 group were decreased(P=0.090;P=0.078).After adding jujube powder,the utilization of nitrogen and calcium in broilers were improved(P<0.05),but the energy utilization was significantly decreased(P<0.05).Adding 0.3 mg/kg selenium to the diet could increase the ADG of broilers during starter.Adding jujube powder could improve feed intake of broilers at starter and increase the utilization of nitrogen and calcium.