Effects of Dietary Methionine Level on Performance, Nutrient Apparent Digestibility and Serum Biochemical Indexes of Alpacas

HAO Xinyun, LIN Yingting, LIU Yingchun, SONG Yuqin, ZHU Fenghua, WANG Shubai

doi:10.3969/j.issn.1006-267x.2018.06.024

2018 , Vol. 30 >Issue 6: 2209 - 2214

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.06.024

Molecular Nutrition

Effects of Dietary Methionine Level on Performance, Nutrient Apparent Digestibility and Serum Biochemical Indexes of Alpacas

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1. College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China;
2. Institute of Animal Husbandry and Veterinary, Qingdao 266000, China

Received date: 2017-12-01

Online published: 2018-06-20

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Abstract

This experiment was conducted to study the effects of dietary methionine level on performance, nutrient apparent digestibility and serum biochemical indexes of alpacas. Nine 26-month-old female alpacas with similar body weight were randomly divided into three groups with 3 replicates in each group and 1 alpaca in each replicate. The methionine levels were set with 0.16%, 0.32% and 0.64% in each group. The feeding experiment and digestion experiment were conducted with total mixed ration. The pre-experimental period lasted for 7 days, and the experimental period lasted for 60 days. The results showed as follows:1) the average daily feed intake, average daily gain and wool production of body surface area per cm2 of alpacas of group 0.32% and group 0.64% were significantly higher than those of group 0.16% (P<0.05), and group 0.32% was slightly higher than those of group 0.64% (P>0.05). 2) The apparent digestibilities of crude protein, neutral detergent fiber, crude fiber and calcium of group 0.32% was the highest, and significantly higher than those of group 0.16% (P<0.05); the acid detergent fiber apparent digestibility of group 0.32% was significantly higher than that of group 0.64% (P<0.05); the methionine apparent digestibility of group 0.32% and group 0.64% was significantly higher than that of group 0.16% (P<0.01). 3) The activities of alanine transaminase, aspartate aminotransferase and alkaline phosphatase in serum of alpacas had no significant difference among all groups (P>0.05), as well as the contents of triglyceride, glucose, usea nitrogen and total protein in serum of alpacas (P>0.05). In conclusion, the optimal dietary methionine level of female alpacas is 0.32% under the condition of this experiment.

Key words： alpacas; methionine; performance; nutrient apparent digestibility; serum biochemical indexes

Cite this article

HAO Xinyun, LIN Yingting, LIU Yingchun, SONG Yuqin, ZHU Fenghua, WANG Shubai . Effects of Dietary Methionine Level on Performance, Nutrient Apparent Digestibility and Serum Biochemical Indexes of Alpacas[J]. Chinese Journal of Animal Nutrition, 2018 , 30(6) : 2209 -2214 . DOI: 10.3969/j.issn.1006-267x.2018.06.024

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