Maternal and/or direct feeding of organic acid-preserved cereal grains improves performance and digestive health of pigs from birth to slaughter

IF 2.5 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Shane Maher , Torres Sweeney , Stafford Vigors , John V. O’Doherty
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引用次数: 0

Abstract

A 2 × 2 factorial arrangement was conducted to investigate the effects of maternal and/or direct feeding of organic acid (OA)-preserved cereal grains compared to conventionally dried grains on pig growth performance to slaughter, nutrient digestibility, and carcass characteristics. On day 100 of gestation, 80 sows were blocked by parity, body weight (BW), and back-fat thickness and assigned to one of two diets (dried or preserved grain) until weaning. From day 10 postpartum, their progeny were assigned to one of two diets (dried or preserved grain) resulting in four dietary treatments: (1) dried (sow)-dried (progeny), (2) dried-preserved, (3) preserved-dried, and (4) preserved-preserved (n = 20 litters per treatment). Pigs remained in these groups post-weaning (PW) and were monitored until slaughter at 142 days PW (n = 10 pens per treatment). Additionally, faecal samples from pigs in the dried-dried and preserved-preserved groups were collected for microbial analysis throughout production. Progeny from sows fed preserved grain had improved gain-to-feed ratio (G:F) between days 0–14 and 62–142 PW, with enhanced coefficients of apparent total tract digestibility (CATTD) of dry matter (DM), organic matter (OM), and gross energy (GE) on day 30 PW and CATTD of nitrogen (N) at slaughter compared to those from sows fed dried grain (P < 0.05). Pigs directly fed preserved grain exhibited higher daily gain from weaning to slaughter, improved G:F from day 14 PW, and greater BW from day 30 PW compared to those directly fed dried grain (P < 0.05). Pigs fed preserved grain showed increased CATTD of DM, OM, N, and GE on day 30 PW and at slaughter (P < 0.01). Additionally, these pigs had higher carcass weight, kill-out percentage, and muscle depth at slaughter (P < 0.01). Pigs in the preserved-preserved group had higher microbial diversity at weaning and on day 30 PW, with beneficial taxa such as Ruminococcus, Propionibacterium, and Faecalibacterium enriched at key production stages compared to those in the dried-dried group (P < 0.05). In conclusion, maternal feeding of preserved grain improved progeny feed efficiency and CATTD of nutrients, while direct feeding enhanced pig growth performance, CATTD of nutrients, and carcass characteristics. Combined maternal and direct feeding of preserved grain also improved microbial health throughout production.
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来源期刊
Animal Feed Science and Technology
Animal Feed Science and Technology 农林科学-奶制品与动物科学
CiteScore
6.00
自引率
6.20%
发文量
266
审稿时长
3 months
期刊介绍: Animal Feed Science and Technology is a unique journal publishing scientific papers of international interest focusing on animal feeds and their feeding. Papers describing research on feed for ruminants and non-ruminants, including poultry, horses, companion animals and aquatic animals, are welcome. The journal covers the following areas: Nutritive value of feeds (e.g., assessment, improvement) Methods of conserving and processing feeds that affect their nutritional value Agronomic and climatic factors influencing the nutritive value of feeds Utilization of feeds and the improvement of such Metabolic, production, reproduction and health responses, as well as potential environmental impacts, of diet inputs and feed technologies (e.g., feeds, feed additives, feed components, mycotoxins) Mathematical models relating directly to animal-feed interactions Analytical and experimental methods for feed evaluation Environmental impacts of feed technologies in animal production.
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