Effects of dietary yam polysaccharide on growth performance and
intestinal microflora in growing Huoyan geese

The present study was carried out to evaluate the effects of dietary yam polysaccharide (YPS) supplementation on growth performance, intestinal morphology, digestive enzyme activities and intestinal microflora of growing geese. A total of 400 Huoyan geese (28 days old, sex-balanced) were allotted to four groups (control, YPS100, YPS500 and YPS1000, according to initial body weight), and their diets included 0, 100, 500 and 1000 mg of YPS per kg of basal diet. Each group consisted of 5 replicates, 20 geese each, and the feeding experiment lasted from 28 to 56 days of age. The results showed that compared to the control group, the YPS500 group had higher final body weight, average daily gain, villus height, villus height to crypt depth ratio, amylase and trypsin activity, while lower feed to gain ratio and lipase activity in the small intestine (P < 0.05). In addition, all experimental groups had a higher number of Lactobacillus and Bifidobacterium, and a lower number of Escherichia coli in the caecal content of growing Huoyan geese (P < 0.05). The results indicated that dietary supplementation with 500 mg/kg YPS improved growth performance by regulating digestive enzyme activities, small intestine morphology and intestinal microflora in growing Huoyan geese.

ACKNOWLEDGEMENTS

This study was supported by the Innovative Research Team (in Science and Technology) at the University of Henan Province (22IRTSTHN026), Provincial Key Technology Research and Development Program of Henan (222102110021, 212102110169, 212102110180, 222102110239, 202102110241).

CONFLICT OF INTEREST

The Authors declare that there is no conflict of interest.

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Chinese

日粮中添加山药多糖对豁眼鹅生长性能和肠道菌群的影响

摘要: 本研究旨在评价日粮中添加山药多糖(YPS)对生长鹅生长性能、肠道形态、消化酶活性和肠道菌群数量的影响。将400只豁眼鹅（28日龄，性别平衡）按初始体重分为4组（对照组、YPS100组、YPS500组和 YPS1000组），对照、YPS100、YPS500和YPS1000组的每千克日粮中分别包含0、100、500和1000 mg YPS。每组设5个重复，每个重复20只鹅，饲养试验从28日龄至56日龄。结果显示，与对照组相比，YPS500组的末重、平均日增重、肠绒毛高度、肠绒毛高度与隐窝深度的比值、淀粉酶和胰蛋白酶活性较高，而料重比、小肠内容物脂肪酶活性较低（P < 0.05）。此外，各试验组生长期豁眼鹅育肠内容物中乳酸杆菌和双歧杆菌数量较高，而大肠杆菌数量较低（P < 0.05）。结果表明，日粮中添加500 mg/kg YPS可以通过调节生长期豁眼鹅的消化酶活性、小肠形态和肠道菌群进而改善豁眼鹅的生长性能。

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