本试验旨在探讨饲粮中添加刺五加多糖(Acanthopanax senticosus polysaccharide,ASPS)对断奶仔猪生长性能和免疫指标的影响。试验选用96头(28±3)日龄、平均体重为(7.13±0.67) kg的"长白×约克夏"二元杂交仔猪,随机分成6组,每组4个重复,每个重复4头猪。对照组饲喂基础饲粮,试验组饲喂在基础饲粮中分别添加150、300、500、800和1 000 mg/kg ASPS的试验饲粮,试验期21 d。结果表明:饲粮中添加500和800 mg/kg ASPS提高了仔猪的末重和平均日增重(P<0.01),降低了仔猪的腹泻率(P<0.01),但对平均日采食量和料重比无显著影响(P>0.05)。随ASPS添加水平的提高,末重、平均日增重和腹泻率均呈二次曲线变化(P<0.01),料重比呈线性改善(P<0.05)。饲粮中添加800 mg/kg ASPS提高了仔猪外周血淋巴细胞转化率(P<0.01),降低了仔猪血清皮质醇水平(P<0.05),二者随ASPS添加水平的提高均呈线性变化(P<0.01)。由此可见,饲粮中添加ASPS可以显著提高断奶仔猪的平均日增重,显著降低腹泻率,改善血液免疫指标,缓解仔猪应激反应,其中以添加量为800 mg/kg效果最好。
This experiment was conducted to investigate the effects of dietary Acanthopanax senticosus polysaccharide (ASPS) on growth performance and immune parameters of weaner piglets. This experiment was a 21-d growth assay, in which ninety-six (28±3)-day-old 'Landrac×Yorkshire’ crossbred weaner pigs with an average body weight of (7.13±0.67) kg were randomly allotted to 6 dietary treatments supplemented with 0 (control), 150, 300, 500, 800 and 1 000 mg/kg of ASPS, respectively. Each treatment was replicated in 4 pens containing 4 pigs per pen. The results showed that compared with the control, diets supplemented with 500 and 800 mg/kg ASPS could extremely significantly improve final body weight and average daily gain (P<0.01), as well as extremely significantly reduced diarrhea ratio (P<0.01), however, the supplementation of ASPS did not significantly affect average daily feed intake and feed to gain ratio (P>0.05). Final body weight, average daily gain and diarrhea ratio were affected quadratically with the increase of dietary ASPS supplemental level (P<0.01) and feed to gain ratio was improved linearly (P<0.05). The supplementation of 800 mg/kg ASPS extremely significantly increased peripheral blood lymphocyte proliferation (P<0.01) and significantly reduced serum cortisol level (P<0.05), and the two parameters changed linearly (P<0.01). The results indicate that the supplementation of ASPS can significantly increase average daily gain and decrease diarrhea ratio, improve immune parameters, and reduce the diarrhea ratio and stress degree of weaner piglets. The optimum supplemental level of ASPS in diets for weaner piglets is 800 mg/kg.
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