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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.19.0057    [Accepted] Published online July 1, 2019.
Changes in growth performance, nutrient digestibility, immune blood profiles, fecal microbial and fecal gas emission of growing pigs in response to zinc aspartic acid chelate
Yang Jiao1, Xinran Li2, In Ho Kim1,*
1Department of Animal Resource and Science, Dankook University, Cheonan, 330-714, Korea
2Department of Mathematics and Statistics, Huazhong Agricultural University, Wuhan, China
Correspondence:  In Ho Kim, Tel: +82-011-9803-9598, Fax: +82-041-553-1618, Email: inhokim@dankook.ac.kr
Received: 20 January 2019   • Revised: 17 March 2019   • Accepted: 20 June 2019
This study was conducted to investigate the effect of zinc aspartic acid chelate (Zn-ASP) on growth performance, nutrient digestibility, blood profiles, fecal microbial and fecal gas emission in growing pigs.
A total of 160 crossbred [(Landrace×Yorkshire)×Duroc] growing pigs with an initial body weight (BW) of 25.56 ± 2.22 kg were used in a 6-wk trial. Pigs were randomly allocated into 1 of 4 treatments according to their sex and BW (8 replicates with 2 gilts and 3 barrows per replication pen). Treatments were as follows: 1) CON, basal diet, 2) TRT1, CON+0.1% Zn-ASP, 3) TRT2, CON+0.2% Zn-ASP, and 4) TRT3, CON+0.3% Zn-ASP. Pens were assigned in a randomized complete block design to compensate for known position effects in the experimental facility.
In the current study, BW, average daily gain (ADG), and gain:feed ratio (G:F) showed significant improvement as dietary Zn-ASP increased (P < 0.05) in growing pigs. Apparent total tract digestibility (ATTD) of dry matter (DM) was increased linearly (P < 0.05) in pigs fed with Zn-ASP diets. A linear effect (P < 0.05) was detected for the Zn concentration in blood with the increasing levels of Zn-ASP supplementation. Lactic acid bacteria and coliform bacteria were affected linearly (P < 0.05) in pigs fed with Zn-ASP diets. However, no significant differences were observed in the ATTD of nitrogen, energy and zinc. And dietary Zn-ASP supplementation did not affect fecal ammonia, hydrogen sulfide and total mercaptans emissions in growing pigs.
In conclusion, dietary supplementation with Zn-ASP of diet exerted beneficial effects on the growth performance, nutrient digestibility, blood profiles and fecal microbes in growing pigs.
Keywords: Zn-ASP; Growth Performance and Nutrient Digestibility; Immune Blood Profiles; Fecal Microbes; Growing Pigs

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