Effects of Nucleotides on Nutrient Apparent Digestibility in Low Protein Level Diet of Litopenaeus vannamei

CHEN Xiaoying; ZHAO Hongxia; WANG Guoxia; CAO Junming; SUN Yuping

doi:10.3969/j.issn.1006-267x.2020.09.052

Chinese Journal of Animal Nutrition >

2020 , Vol. 32 >Issue 9: 4408 - 4417

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.09.052

Effects of Nucleotides on Nutrient Apparent Digestibility in Low Protein Level Diet of Litopenaeus vannamei

CHEN Xiaoying ,
ZHAO Hongxia ,
WANG Guoxia ,
CAO Junming ,
SUN Yuping

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1. Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou 510640, China;
2. Guangzhou Fishtech Biotechnology Co., Ltd., Guangzhou 510640, China

Received date: 2020-03-27

Online published: 2020-09-17

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Abstract

This experiment was aiming to study the effects of nucleotides on apparent digestibilities of dry matter, crude protein, ether extract, phosphorus, amino acids and fatty acids of Litopenaeus vannamei. A total of 480 Litopenaeus vannamei with initial weight of (2.00±0.01) g were randomly divided into 3 groups with 4 replicates per group and 40 fish per replicate. Two control groups were set, which were low protein control group (L₀ group, dietary crude protein level was 37.92%) and high protein control group (H₀ group, dietary crude protein level was 46.45%), and supplemented with 400 mg/kg nucleotides based on L₀ group (LN group). From the 10th day after feeding the formal experimental diets, and the feces were collected continuously by siphon method for 30 days. The results showed as follows:1) the apparent digestibilities of dry matter, crude protein, ether extract, ash and total phosphorus of LN group were the highest. The apparent digestibilities of ether extract and total phosphorus of LN group were significantly higher than those of the H₀ group (P<0.05), but there were no significant differences with the L₀ group (P>0.05). 2) There were no significant differences on apparent digestibilities of each amino acids, nonessential amino acids and essential amino acids among all groups (P>0.05). 3) The apparent digestibilities of saturated fatty acids C17:0, C20:0, C22:1, C18:3 and docosahexaenoic acid (DHA) of LN group were significantly higher than those of L₀ group and H₀ group (P<0.05). The apparent digestibilities of C14:0 and C16:1 of LN group were significantly higher than those of the H₀ group (P<0.05), but there were no significant differences with the L₀ group (P>0.05). There were no significant differences on apparent digestibilities of monounsaturated fatty acids, polyunsaturated fatty acids and total fatty acids among all groups (P>0.05). In conclusion, adding nucleotides in low protein level diets can improve the nutrient apparent digestibilities of diets of Litopenaeus vannamei, especially for the ether extract, total phosphorus and fatty acids.

Key words： nucleotides; Litopenaeus vannamei; low protein level diets; nutrient apparent digestibilities

Cite this article

CHEN Xiaoying , ZHAO Hongxia , WANG Guoxia , CAO Junming , SUN Yuping . Effects of Nucleotides on Nutrient Apparent Digestibility in Low Protein Level Diet of Litopenaeus vannamei[J]. Chinese Journal of Animal Nutrition, 2020 , 32(9) : 4408 -4417 . DOI: 10.3969/j.issn.1006-267x.2020.09.052

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