The effect of electronic cooling pads and Moringa oleifera supplementation from late gestation to weaning on sow production performance under heat stress conditions.

IF 2.7 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
McKeeley C Stansberry, Wonders Ogundare, Linda M Beckett, Leriana Garcia Reis, Evy M Tobolski, Uchenna Anele, Brian T Richert, Allan P Schinckel, Theresa M Casey, Radiah C Minor
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Abstract

Lactating sows and their litters are particularly vulnerable to heat stress (HS). HS decreases fertility, feed intake, milk production, and litter growth of sows. Approaches are needed to mitigate the negative effects of HS on animal welfare and oxidative damage to tissues. The objective of this study was to measure the efficacy of conductive heat removal using electronic cooling pads (ECP) and feeding Moringa oleifera (4% of the diet, M), a feedstuff high in antioxidants, to sows from late gestation to weaning on their welfare and production performance. A study was conducted using a 2 × 2 factorial design of treatments, with mixed parity Yorkshire × Landrace sows (n = 48). The sows were exposed to moderate HS conditions from gestation day 110 to day 21 of lactation. To achieve moderate HS, the farrowing room temperature was increased incrementally daily from 25 °C to 32 °C between 0800 and 1100 hours and decreased from 32 °C to 26 °C between 1700 and 2000 hours. Sows were limit fed during gestation (1.36 kg 2X/d) and fed ad libitum post farrowing. Treatments included HS + control corn-soybean meal (CS)-based diet (HS + CS), HS + M, ECP + CS, ECP + M (n = 12/treatment). Sow respiration rate (RR) and rectal temperature (RT) were measured four times daily (0600, 1300, 1600, and 1900 hours). The use of ECP decreased lactating sow RR (HS = 66.6 bpm, ECP = 28.3 bpm, P < 0.0001), RT (HS = 39.2 °C, ECP = 38.8 °C, P = 0.003), and lactation body weight (BW) loss (HS = -21.67 kg, ECP = -5.1 kg P = 0.002). ECP by time-of-day interactions (P < 0.01) existed for RR and RT, with ECP having a greater impact from 1300 to 1900 hours, than at 0600 hours. ECP increased the intake of lactation feed (P = 0.02). An ECP by diet interaction (P = 0.0004) indicated that ECP increased the intake of lactation feed for the sows fed the CS diet (6.48 vs. 4.42 kg/d, P = 0.0004), but did not affect the feed intake of sows fed the M diet. The treatment did not affect litter weaning weight (P = 0.14). Moringa increased percent fat in milk (M = 12.28%, CS = 11.06%, P = 0.05). The reduction in sow RR and RT, and increase in feed intake with lower loss of BW indicate that ECP improved sow well-being in the HS environment. Neither ECP nor M affected litter growth, despite M increasing fat content of milk and ECP-CS increasing feed intake.

热应激条件下,妊娠后期至断奶添加电子冷却垫和辣木对母猪生产性能的影响。
哺乳母猪及其窝仔特别容易受到热应激(HS)的影响。热应激降低母猪肥力、采食量、产奶量和产仔生长。需要采取措施减轻HS对动物福利的负面影响和对组织的氧化损伤。本研究的目的是测定电子冷却垫(ECP)导热去除和饲粮中添加高抗氧化剂辣木(M)对妊娠后期至断奶母猪福利和生产性能的影响。本研究采用2 × 2因子设计,使用混合胎次约克郡母猪和长白猪(n=48)。从妊娠第110天至泌乳第21天,将母猪置于中度热应激条件下。为了达到中度热应激,产房温度在0800-1100之间从25ºC逐渐升高到32ºC,在1700-2000之间从32ºC逐渐降低到26ºC。母猪妊娠期限饲(1.36 kg 2X/d),分娩后自由饲喂。处理包括HS+对照玉米-豆粕型饲粮(HS+CS)、HS+M、ECP+CS、ECP+M (n=12/处理)。每天测定4次(0600、1300、1600、1900)母猪呼吸速率(RR)和直肠温度(RT)。使用ECP可降低泌乳母猪RR (HS= 66.6 bpm, ECP = 28.3 bpm, P < 0.0001)、RT (HS= 39.2ºC, ECP =38.8ºC, P = 0.003)和泌乳体重损失(HS= -21.67 kg, ECP = -5.1 kg P = 0.002)。RR和RT的ECP随时间相互作用显著(P < 0.01),其中1300 ~ 1900对ECP的影响大于0600。ECP提高了泌乳采食量(P = 0.02)。饲粮交互作用的ECP (P= 0.0004)表明,ECP提高了CS组母猪的泌乳采食量(6.48 kg/d vs 4.42 kg/d, P= 0.0004),但对M组母猪的采食量没有影响。处理不影响仔猪断奶重(P = 0.14)。辣木能提高牛奶中脂肪含量(M=12.28%, CS =11.06%, P = 0.05)。母猪RR、RT降低,采食量增加,体重损失降低,表明ECP改善了HS环境下母猪的健康状况。ECP和M均不影响产仔生长,但M提高了乳汁脂肪含量,ECP- cs提高了采食量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of animal science
Journal of animal science 农林科学-奶制品与动物科学
CiteScore
4.80
自引率
12.10%
发文量
1589
审稿时长
3 months
期刊介绍: The Journal of Animal Science (JAS) is the premier journal for animal science and serves as the leading source of new knowledge and perspective in this area. JAS publishes more than 500 fully reviewed research articles, invited reviews, technical notes, and letters to the editor each year. Articles published in JAS encompass a broad range of research topics in animal production and fundamental aspects of genetics, nutrition, physiology, and preparation and utilization of animal products. Articles typically report research with beef cattle, companion animals, goats, horses, pigs, and sheep; however, studies involving other farm animals, aquatic and wildlife species, and laboratory animal species that address fundamental questions related to livestock and companion animal biology will be considered for publication.
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