Molecular Nutrition

Effects of Fermented Distiller's Grains on Growth Performance, Digestibility and Metabolism, and Nitrogen Excretion of Weaned Piglets

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  • 1. Key Laboratory of Agro-ecological Processes in Subtropical Region, Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;
    2. College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China

Received date: 2017-12-14

  Online published: 2018-07-20

Abstract

This study was conducted to investigate the effects of fermented distiller's grains (FDG) on growth performance, digestibility and metabolism, and nitrogen (N) excretion of weaned piglets. A total of 24 Duroc×Landrace×Yorkshire barrows weaned at 21 days of age were randomly assigned into one of four groups with 6 replicates in each group and 1 pig in each replicate. The piglets in the control group were fed a basal diet, and in the other three groups were fed the basal diet containing 2%, 4% or 6% FDG, respectively. The digestion and metabolism trials were carried out at 10 kg and 25 kg of average body weight (BW), respectively, after the piglets were transferred to metabolic cages. Each trial lasted for one week, including a 4-day adaptation period followed by 3 days for collection of feces and urine. Feed intake per piglet was recorded daily, and the BW was got at the beginning or end of each trail. The digestibility rates of routine nutrients and amino acids were calculated with total collection of feces and urine, as well as nitrogen excretion of piglets. The results showed that, in the trial of 10 kg BW, compared with the control group, the apparent digestible energy (ADE) and urinary N in the 2% FDG group decreased (P<0.05), while apparent digestibility rates of other nutrients had no significant differences (P>0.05); apparent digestibility rates of gross energy (GE), lysine, methionine (Met) and proline significantly decreased (P<0.05) in the 4% and 6% FDG groups, as well as apparent metabolizable energy (AME) and ADE (P<0.05). In the trial of 25 kg BW, compared with the control group, apparent digestibility rates of dry matter (DM), crude ash and ether extract had no significant differences in the 2% FDG group (P>0.05), but the average daily gain significantly increased (P<0.05); digestibility rate of Met significantly decreased (P<0.05) in the 6% FDG group; the contents of N intake, absorbed N, retained N and N apparent digestibility significantly decreased (P<0.05) in the 2%, 4%, and 6% FDG groups, as well as the apparent digestibility rates of crude protein, GE, AME and ADE (P<0.05), while the fecal N content significantly increased (P<0.05). These findings suggest that dietary supplementation with 2% FDG does not affect the DM apparent digestibility and improves growth performance of weaned piglets; supplementation with higher levels of FDG for long period decreases the digestion and metabolism of routine nutrients to a certain extent.

Cite this article

LI Zhihua, ZHANG Ting, SU Jiayi, WANG Deyun, KONG Xiangfeng . Effects of Fermented Distiller's Grains on Growth Performance, Digestibility and Metabolism, and Nitrogen Excretion of Weaned Piglets[J]. Chinese Journal of Animal Nutrition, 2018 , 30(7) : 2807 -2816 . DOI: 10.3969/j.issn.1006-267x.2018.07.042

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