Effects of Nutrient Levels during Pregnancy on Reproductive Performance and Milk Composition of Primiparous Sows

YANG Mei; WU De; CHE Liqiang; WANG Jun; FANG Zhengfeng; LIN Yan; XU Shengyu

doi:10.3969/j.issn.1006-267x.2013.09.007

Chinese Journal of Animal Nutrition >

2013 , Vol. 25 >Issue 9: 1954 - 1962

DOI: https://doi.org/10.3969/j.issn.1006-267x.2013.09.007

Swine Nutrition

Effects of Nutrient Levels during Pregnancy on Reproductive Performance and Milk Composition of Primiparous Sows

YANG Mei ,
WU De ,
CHE Liqiang ,
WANG Jun ,
FANG Zhengfeng ,
LIN Yan ,
XU Shengyu

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Key Laboratory of Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an 625014, China

Received date: 2013-03-07

Online published: 2013-08-18

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Abstract

This experiment was conducted to study the effects of different nutrient levels during pregnancy on reproductive performance and milk composition of primiparous sows. Forty-four crossbred sows (Landrace譟orkshine) with similar age and body weight were randomly allocated into four groups with different nutrient intake levels (75% NRC, NRC, 125% NRC and 150% NRC) during pregnancy, and every group had 11 replicates with 1 sow in each replicate. All sows were fed ad libitum during lactation. The results showed as follows: 1) nutrient intake levels of sows during pregnancy did not affect total litter size born per litter (P>0.05), but the piglet born alive per litter in 150% NRC group had a trend to be less than that in 125% NRC group (P=0.081). The number of piglet born healthy per litter and litter weight at birth in 125% NRC group were significantly higher than those in 75% NRC group (P<0.05), and had a trend to be higher than those in 150% NRC group (P=0.083,P=0.090), but were not significantly different compared with NRC group (P>0.05). 2) Total weight gain during pregnancy, net weight gain during pregnancy and breeding-weaning weight gain were significantly different among all groups (P<0.01), and with nutrient intake levels during pregnancy improving, weight loss during lactation was significantly increased (P<0.01). 3) With nutrient intake levels of sows during pregnancy increasing, average daily feed intake during lactation was decreased, and regression relationship between digestible energy intake of lactation Y₃ (MJ/d) and digestible energy intake during pregnancy X (MJ/d) was Y₃=75.60-0.743X(R₂=0.572,P<0.01). 4) Milk fat and protein contents in colostrum were increased with dietary nutrient intake levels during pregnancy increasing (P<0.01), but the contents of milk fat and protein in 125% NRC group were the highest, and regression relationship between nutrient levels and milk fat and protein contents was quadratic (P<0.01). Thus, 125% NRC nutrient level provided during pregnancy can improve reproductive performance and milk quality of sows.

Key words： nutrient levels; primiparous sows; pregnancy; reproductive performance; milk composition

Cite this article

YANG Mei , WU De , CHE Liqiang , WANG Jun , FANG Zhengfeng , LIN Yan , XU Shengyu . Effects of Nutrient Levels during Pregnancy on Reproductive Performance and Milk Composition of Primiparous Sows[J]. Chinese Journal of Animal Nutrition, 2013 , 25(9) : 1954 -1962 . DOI: 10.3969/j.issn.1006-267x.2013.09.007

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