Effects of Energy Feeding Level in Late Gestation on Reproductive Performance and Blood Lipid Metabolism Related Indicators of Sows

JIANG Zhaoning, WANG Wenhui, WU Fei, LIU Hu, WANG Zhenyu, WANG Chunlin, ZENG Xiangfang, WANG Fenglai

doi:10.3969/j.issn.1006-267x.2018.08.012

2018 , Vol. 30 >Issue 8: 2960 - 2968

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.08.012

Molecular Nutrition

Effects of Energy Feeding Level in Late Gestation on Reproductive Performance and Blood Lipid Metabolism Related Indicators of Sows

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College of Animal Science and Technology, China Agricultural University, Beijing 100193, China

Received date: 2018-02-06

Online published: 2018-08-18

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Abstract

This experiment was conducted to investigate the effects of energy feeding level in late gestation on reproductive performance and blood lipid metabolism related indicators of sows. At d 85 of gestation, a total of 48 multiparous Large White×Danish Landrace crossbred sows were randomly divided into 4 group (n=12) with low (L), medium (M), high (H) and extreme high (EH) energy feeding levels according to body weight and parity. The energy feeding levels for the 4 groups were 1.12, 1.32, 1.52 and 1.72 times of maintenance metabolic energy requirement (M) and they were named as 1.12M, 1.32M, 1.52M and 1.72M groups, respectively. All sows were fed corn-soybean meal type diet[metabolic energy (ME) was 13.38 MJ/kg, and crude protein (CP) content was 15.09%]. The medium energy feeding level referred to NRC (2012) effective metabolic energy recommendation of pregnant sows. The low, high and extreme high energy feeding levels were decreased by 15%, and increased by 15% and 30% on the basis of medium energy feeding level, respectively. The daily feed intake of sows in 1.12M, 1.32M, 1.52M and 1.72M groups were 2.17, 2.56, 2.94 and 3.32 kg/d, and metabolic energy intake of sows were 29.10, 34.23, 39.37 and 44.50 MJ/d, respectively. The trial period was 23 days. The results showed that the average daily feed intake (ADFI) of lactating sows was significantly decreased with the increase of energy feeding level (P<0.05). At 100 days of gestation, serum total cholesterol and low density lipoprotein concentrations were linearly increased with the increase of energy feeding level (P<0.05), and serum triglycerides and high density lipoprotein concentrations were quadratically increased with the increase of energy feeding level (P<0.05). In late gestation period, serum total cholesterol concentration of sows was significantly decreased with the extension of gestation time (P<0.05), serum high-density lipoprotein and low density lipoprotein concentrations were significantly lower at 107 days of gestation than that at 100 and 85 days of gestation (P<0.05), serum triglyceride concentration was significantly higher at 100 days of gestation than that at 85 and 107 days of gestation (P<0.05), and it was significantly higher at 107 days of gestation than that at 85 days of gestation (P<0.05). These findings suggest that increasing energy feeding level during late gestation reduces feed intake of sows during lactation. Blood lipid concentration is at a physiologically high level during late gestation. On this basis, increasing energy feeding level can further increase the concentrations of serum triglyceride, high-density lipoprotein, low-density lipoprotein and total cholesterol.

Key words： sows; late gestation; energy feeding level; reproductive performance; blood lipid metabolism related indicators

Cite this article

JIANG Zhaoning, WANG Wenhui, WU Fei, LIU Hu, WANG Zhenyu, WANG Chunlin, ZENG Xiangfang, WANG Fenglai . Effects of Energy Feeding Level in Late Gestation on Reproductive Performance and Blood Lipid Metabolism Related Indicators of Sows[J]. Chinese Journal of Animal Nutrition, 2018 , 30(8) : 2960 -2968 . DOI: 10.3969/j.issn.1006-267x.2018.08.012

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