浓缩大豆磷脂对肉仔鸡生产性能的影响

本试验采用单因子随机化设计,将225只艾维菌肉仔鸡随机分为5个处理组,每个处理组设3个重复,每个重复15只鸡,以玉米-豆粕型日粮为基础日粮,饲喂处理1设为空白对照组;处理2添加猪油,设为猪油对照组;处理3、4、5分别添加低、中、高水平的浓缩大豆磷脂,为试验组.在0～3周龄猪油以2%,浓缩大豆磷脂分别以2%、3%、4%;在4～6周龄猪油以3%,浓缩大豆磷脂分别以3%、4%、5%添加到基础日粮中以替代相同比例的玉米,蛋白质水平维持不变.研究添加猪油和不同水平的浓缩大豆磷脂对肉仔鸡生长性能的影响,并对其作用机理进行了初步探讨.结果表明:在0～3周龄时,中、高水平试验组极显著地提高了采食量(P<0.01);在4～6周龄时,中水平试验组具有较大的采食量,但高水平试验组采食量有所下降;从全期来看,猪油对采食量影响不大;在0～3周龄,中、高水平试验组极显著地提高了增重(P<0.01),而且在此阶段添加油脂显著提高了饲料转化率(P<0.05);在4～6周龄时,添加油脂极显著提高了增重和饲料转化率(P<0.01);从全期来看,添加油脂可以提高增重与饲料转化率,且在0～3周龄时浓缩大豆磷脂优于猪油.

Effect of concentrated soybean lecithin on production performance of broilers

One way random experiment was designed to investigate the influence of concentrated soybean lecithin on production performance,carcass quality and biochemical indexes in the serum of broilers. Two hundred and twenty-five Avin birds (mixed sex) were randomly divided into 5 groups with one way random design,each containing 3 replications (5 birds per replicate).Five dietary treatments, consisting of the basal diet(blank control), basal diet lard, basal diet concentrated soybean lecithin(low level, middle level, high level), were allotted to 5 groups. Group 1 was the blank control group (BC), fed with the basal diet. Group 2 was the lard control group (LC), fed with the lard diet which substitution of lard for corn at same level in the basal diet,in 0~3weeks 2% substitution rate,in 4~6weeks 3% substitution rate.Group 3 to 5 were fed with concentrated soybean lecithin diet which substitution of concentrated soybean lecithin for corn at same level in the basal diet, in 0~3weeks 2% (low level, LL), 3% (middle level, ML), 4% (high level, HL) respectively substitution rate, in 4~6weeks 3% (low level, LL), 4%( middle level, ML), 5%(high level, HL) respectively substitution rate. Each group was at same dietary protein level. The experiment result showed that:in 0~3weeks,the intake was significantly increased (P<0.01) in ML and HL groups. In 4~6weeks, ML group had greater intake, but HL group reduced the intake.In the whole period the lard diet had no significant effect on the intake.In 0~3weeks, body weight gain and FCR were significantly increased in ML and HL groups(P<0.01).In 4~6weeks,the diets supplemented with lipid had significant effect on body weight gain and FCR of broilers (P<0.01). In the whole period the diets supplemented with lipid improved body weight gain and FCR,the results of concentrated soybean lecithin was better than lard.