SWINE NUTRITION AND FEED

Effects of D-Aspartate on Growth Performance, Serum Biochemical Indices and Nutrient Apparent Digestibilities in Weaned Piglets

  • WANG Chenyu ,
  • LIU Yonghui ,
  • LI Xiang ,
  • HU Xian ,
  • HE Liuqin ,
  • LI Tiejun ,
  • YIN Yulong
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  • 1. Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;
    2. College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, College of Life Science, Hunan Normal University, Changsha 410081, China

Received date: 2020-11-10

  Online published: 2021-06-10

Abstract

The aim of this study was to investigate the effects of D-aspartate on growth performance, serum biochemical indices, serum free amino acid contents and nutrient apparent digestibilities in weaned piglets. Forty-four healthy crossbreed weaned piglets (Duroc×Landrace×Yorkshire) weighing (10.74±0.25) kg and were randomly divided into 4 groups with 11 replicates per group and 1 pig per replicate at the age of 45 days. The control group was fed a basic diet. The test groups Ⅰ, Ⅱ and Ⅲ were fed the basic diet supplemented with 50, 500 and 5 000 mg/kg D-aspartate. The experiment lasted for 28 days. The results showed as follows:1) compared with the control group, the weight of weaned piglets on the 14th day in the test group Ⅰ was significantly increased (P<0.05). Adding 50 mg/kg D-aspartate could significantly promote the average daily gain, average daily feed intake, and also significantly reduce the ratio of feed to gain (P<0.05). 2) Compared with the control group, D-aspartate in the diet had no significant effect on the organ indexes (P>0.05). 3) Compared with the control group, serum total protein (TP) content was significantly increased in the groups Ⅱ and Ⅲ (P<0.05). The content of serum albumin (ALB) and the activity of alkaline phosphatase (ALP) in three test groups were significantly higher than those in the control group (P<0.05), and they were increased with the level of D-aspartate increased. 4) Compared with the control group, the serum isoleucine (Ile), leucine (Leu), phenylalanine (Phe) and valine (Val) contents in three test groups were significantly reduced (P<0.05), but the lysine (Lys) content was significantly increased (P<0.05). The serum Asp content in the group Ⅲ was significantly higher than that in the other three groups (P<0.05), and the serum glycine (Gly) and cysteine (Cys) contents in the group Ⅱ were significantly higher than those in the other three groups (P<0.05). 5) Compared with the control group, the apparent digestibility of crude fat in the test groups Ⅰ, Ⅱ and Ⅲ was significantly increased (P<0.05). The test group Ⅰ had the lowest apparent digestibility in crude protein, total energy and crude fiber. In summary, adding 50 mg/kg of D-aspartate to low-protein balanced diets can effectively improve piglet growth performance and promote nutrient absorption and utilization.

Cite this article

WANG Chenyu , LIU Yonghui , LI Xiang , HU Xian , HE Liuqin , LI Tiejun , YIN Yulong . Effects of D-Aspartate on Growth Performance, Serum Biochemical Indices and Nutrient Apparent Digestibilities in Weaned Piglets[J]. Chinese Journal of Animal Nutrition, 2021 , 33(6) : 3154 -3164 . DOI: 10.3969/j.issn.1006-267x.2021.06.018

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