Effects of Dietary α-Ketoglutarate Supplementation on Nitrogen and Calcium & Phosphorus Metabolism of Growing Pigs

CHEN Jiashun; WU Fei; DUAN Yehui; LI Jianjun; JIANG Qian; LI Huan; HUANG Niu; TIAN Junquan; YIN Yulong; YAO Kang

doi:10.3969/j.issn.1006-267x.2016.07.021

Chinese Journal of Animal Nutrition >

2016 , Vol. 28 >Issue 7: 2154 - 2161

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.07.021

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Effects of Dietary α-Ketoglutarate Supplementation on Nitrogen and Calcium & Phosphorus Metabolism of Growing Pigs

CHEN Jiashun ,
WU Fei ,
DUAN Yehui ,
LI Jianjun ,
JIANG Qian ,
LI Huan ,
HUANG Niu ,
TIAN Junquan ,
YIN Yulong ,
YAO Kang

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1. Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South Central, Ministry of Agriculture, Hunan Provincial Engineering Research Center for Healthy Breeding of Livestock and Poultry, Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;
2. College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China

Received date: 2016-01-18

Online published: 2016-07-28

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Abstract

This experiment was conducted to investigate the effects of α-ketoglutarate (AKG) supplementation in low protein diet on nitrogen and calcium (Ca) & phosphorus (P) metabolism of growing pigs. Eighteen healthy crossbred (Duroc×Landrace×Largewhite) pigs with an average body weight of (34.98±2.18) kg were randomly allocated to 3 groups evenly with 6 replicates in each group and 1 pig in each replicate. AKG supplemental level was 0 (control group), 1% and 2%, respectively. All pigs were firstly fed for 14 d, and growth performance was measured, followed by digestion and metabolism test. The experiment lasted for 7 d, the former 5 d was pre-trail period, and the latter 2 d was excreta collection period by means of collection full excrements analysis method. The results showed as follows: 1) growth performance of growing pigs with the weight of 35 to 45 kg tended to improve in 1% AKG supplementation group, embodied as increasing the average daily gain (P=0.194 2) and the average daily feed intake (P=0.258 3), while decreasing the feed to gain ratio (P=0.419 7). 2) With the increase of dietary AKG supplemental levels, the urine nitrogen content tended to decrease (P=0.143 2), the contents of fecal nitrogen and total nitrogen as well as total nitrogen emission rate were extremely significantly decreased (P<0.01), while the nitrogen apparent digestibility and net protein utilization were extremely significantly increased (P<0.01). Compared to the control group, urine nitrogen content was decreased by 13.31% and 41.88%, fecal nitrogen content was decreased by 18.73% and 54.69%, total nitrogen emission rate was decreased by 20.57% and 50.00%, nitrogen apparent digestibility was increased by 2.60% and 6.32%, and net protein utilization was increased by 2.68% and 6.51% in 1% and 2% AKG supplementation groups, respectively. 3) Compared to the control group, the 2% AKG supplementation group significantly decreased the Ca intake, contents of fecal Ca and P (P<0.05), while increased apparent digestibilities of Ca and P (P<0.05), and tended to decrease the contents of urine Ca and P compared to the other groups, but the difference was not significant (P>0.05). Thus, dietary 1% to 2% AKG supplementation can effectively reduce the body's nitrogen, Ca and P emissions, improve utilization of nitrogen and Ca & P and daily gain of growing pigs with the weight of 35 to 45 kg.

Key words： α-ketoglutarate; growing pigs; nitrogen metabolism; Ca & P metabolism

Cite this article

CHEN Jiashun , WU Fei , DUAN Yehui , LI Jianjun , JIANG Qian , LI Huan , HUANG Niu , TIAN Junquan , YIN Yulong , YAO Kang . Effects of Dietary α-Ketoglutarate Supplementation on Nitrogen and Calcium & Phosphorus Metabolism of Growing Pigs[J]. Chinese Journal of Animal Nutrition, 2016 , 28(7) : 2154 -2161 . DOI: 10.3969/j.issn.1006-267x.2016.07.021

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