绿茶浸提液对青脚麻鸡消化酶活性、营养物质表观代谢率和血清生化指标的影响

doi:10.16431/j.cnki.1671-7236.2025.06.009

Abstract

Abstract: 【Objective】 The aim of this experiment was to investigate the effects of different concentrations of tea extract in drinking water on digestive enzyme activities,nutrient apparent metabolism rate and serum biochemical indices of Cyan-shank Partridge chickens,so as to open up a new feasible way for the potential application of waste tea as a novel feed additive in poultry production.【Method】 A total of 400 one-day-old Cyan-shank Partridge chickens were randomly distributed into four groups,with 5 replicates in each group and 20 chickens in each replicate.Chickens in each group were fed the same basal diet.The chickens in control group drank water freely，and the chickens in experimental groups Ⅰ,Ⅱ and Ⅲ drank water with 0.3%,0.6% and 1.2% green tea aqueous extract,respectively.The experiment lasted for 21 days.At the end of the experiment,two chickens were randomly selected from each replicate for blood sampling,slaughtering,and collecting pancreas and duodenum to determine serum biochemical indices and intestinal digestive enzyme activities.At 19,20 and 21 days,the fresh feces of chickens were collected in the unit of repetition to determine the apparent metabolism rate of feed nutrients.【Result】 Compared with control group,the activities of pancreatic lipase of chickens in each experimental group was significantly lower (P＜0.05),the activity of duodenal trypsin in experimental groups Ⅱ and Ⅲ were significantly higher (P＜0.05),and the activity of duodenal lipase in experimental group Ⅲ was significantly lower (P＜0.05).The apparent metabolism rate of crude protein in experimental groups Ⅱ and Ⅲ were significantly higher (P＜0.05).Compared with control group,the serum triglyceride (TG) content of chickens was significantly lower in all experimental groups (P＜0.05),the serum urea nitrogen(BUN),low density lipoprotein cholesterol (LDLC) content and the activity of alanine aminotransferase (ALT) were significantly lower in experimental groups Ⅱ and Ⅲ(P＜0.05).The serum BUN content in experimental groups Ⅱ and Ⅲ was lower than that of the experimental group Ⅰ(P＜0.05),the serum LDLC content and the activity of ALT in experimental group Ⅲ were significantly lower than that of experimental groupⅠ(P＜0.05).【Conclusion】 The consumption of tea extract could increase the apparent metabolism rate of crude protein and the activity of intestinal trypsin of Cyan-shank Partridge chickens.Additionally,it had a favourable effect on serum protein and lipid metabolism indexes,and it was recommended to drink 0.6% green tea extract for Cyan-shank partridge chickens.

Key words: green tea aqueous extract; Cyan-shank Partridge chickens; apparent digestibility; digestive enzyme activity; serum biochemical indices

CLC Number:

S816.7

TANG Li, DENG Kaiwei, HE Shuhai, LI Jun, QIN Qingming, LIANG Chengcheng, WU Haigang, HAN Xu, LU Jianing. Effects of Green Tea Aqueous Extract on Nutrient Apparent Metabolism Rate,Digestive Enzyme Activities and Serum Biochemical Indices of Cyan-shank Partridge chickens[J]. China Animal Husbandry & Veterinary Medicine, 2025, 52(6): 2552-2560.

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Effects of Green Tea Aqueous Extract on Nutrient Apparent Metabolism Rate,Digestive Enzyme Activities and Serum Biochemical Indices of Cyan-shank Partridge chickens

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