[1] EISSEN J J,KANIS E,KEMP B.Sow factors affecting voluntary feed intake during lactation[J].Livestock Production Science,2000,64(2/3):147-165.
[2] ENGBLOM L,LUNDEHEIM N,STRANDBERG E,et al.Factors affecting length of productive life in Swedish commercial sows[J].Journal of Animal Science,2008,86(2):432-441.
[3] KIM S W,WEAVER A C,SHEN Y B,et al.Improving efficiency of sow productivity:nutrition and health[J].Journal of Animal Science and Biotechnology,2013,4(1):26.
[4] MAXWELL C V,COMBS G E,KNABE D A,et al.Effect of dietary chlortetracycline during breeding and(or) farrowing and lactation on reproductive performance of sows:a cooperative study.S-145 committee on nutritional systems for swine to increase reproductive efficiency[J].Journal of Animal Science,1994,72(12):3169-3176.

[5] ZENG Z K,ZHANG S,WANG H L,et al.Essential oil and aromatic plants as feed additives in non-ruminant nutrition:a review[J].Journal of Animal Science and Biotechnology,2015,6(1):7.
[6] SI W,GONG J,TSAO R,et al.Antimicrobial activity of essential oils and structurally related synthetic food additives towards selected pathogenic and beneficial gut bacteria[J].Journal of Applied Microbiology,2006,100(2):296-305.

[7] CAPECKA E,MARECZEK A,LEJA M.Antioxidant activity of fresh and dry herbs of some Lamiaceae species[J].Food Chemistry,2005,93(2):223-226.

[8] TAN C Q,WEI H K,SUN H Q,et al.Effects of dietary supplementation of oregano essential oil to sows on oxidative stress status,lactation feed intake of sows,and piglet performance[J].BioMed Research International,2015,2015(2):525218.
[9] BREWER M S.Natural antioxidants:sources,compounds,mechanisms of action,and potential applications[J].Comprehensive Reviews in Food Science and Food Safety,2011,10(4):221-247.

[10] MUCHUWETI M,KATIVU E,MUPURE C H,et al.Phenolic composition and antioxidant properties of some spices[J].American Journal of Food Technology,2007,2(5):414-420.

[11] KÄHKÖNEN M P,HOPIA A I,VUORELA H J,et al.Antioxidant activity of plant extracts containing phenolic compounds[J].Journal of Agricultural and Food Chemistry,1999,47(10):3954-3962.

[12] HU Y J,GAO K G,ZHENG C T,et al.Effect of dietary supplementation with glycitein during late pregnancy and lactation on antioxidative indices and performance of primiparous sows[J].Journal of Animal Science,2015,93(5):2246-2254.

[13] XI Q Y,JIANG Y,ZHAO S,et al.Effect of ginseng polysaccharides on the immunity and growth of piglets by dietary supplementation during late pregnancy and lactating sows[J].Animal Science Journal,2016,88(6):863-872.
[14] BURT S.Essential oils:their antibacterial properties and potential applications in foods-a review[J].International Journal of Food Microbiology,2004,94(3):223-253.

[15] FRIEDMAN M,HENIKA P R,MANDRELL R E.Bactericidal activities of plant essential oils and some of their isolated constituents against Campylobacter jejuni,Escherichia coli,Listeria monocytogenes,and Salmonella enterica[J].Journal of Food Protection,2002,65(10):1545-1560.

[16] BOGAVAC M,KARAMAN M,JANJUŠEVI ? L,et al.Alternative treatment of vaginal infections-in vitro antimicrobial and toxic effects of Coriandrum sativum L. and Thymus vulgaris L. essential oils[J].Journal of Applied Microbiology,2015,119(3):697-710.

[17] KARAMAN M,BOGAVAC M,RADOVANOVI ? B,et al.Origanum vulgare essential oil affects pathogens causing vaginal infections[J].Journal of Applied Microbiology,2017,122(5):1177-1185.

[18] FRATINI F,CASELLA S,LEONARDI M,et al.Antibacterial activity of essential oils,their blends and mixtures of their main constituents against some strains supporting livestock mastitis[J].Fitoterapia,2014,96:1-7.
[19] SARKAR P,KUMAR H,RAWAT M,et al.Effect of administration of garlic extract and PGF2α on hormonal changes and recovery in endometritis cows[J].Asian-Australasian Journal of Animal Sciences,2006,19(7):964-969.

[20] MAUCH C,BILKEI G.Strategic application of oregano feed supplements reduces sow mortality and improves reproductive performance-a case study[J].Journal of Veterinary Pharmacology and Therapeutics,2004,27(1):61-63.

[21] AMRIK B,BILKEI G.Influence of farm application of oregano on performances of sows[J].Canadian Veterinary Journal La Revue Veterinaire Canadienne,2004,45(8):674-677.
[22] ALLAN P,BILKEI G.Oregano improves reproductive performance of sows[J].Theriogenology,2005,63(3):716-721.

[23] HOSSAIN M M,BEGUM M,NYACHOTI C M,et al.Dietary fenugreek seed extract improves performance and reduces fecal E. coli counts and fecal gas emission in lactating sows and suckling piglets[J].Canadian Journal of Animal Science,2015,95(4):561-568.

[24] LEONARD S G,SWEENEY T,BAHAR B,et al.Effect of dietary seaweed extracts and fish oil supplementation in sows on performance,intestinal microflora,intestinal morphology,volatile fatty acid concentrations and immune status of weaned pigs[J].The British Journal of Nutrition,2011,105(4):549-560.

[25] LEONARD S G,SWEENEY T,BAHAR B,et al.Effect of maternal seaweed extract supplementation on suckling piglet growth,humoral immunity,selected microflora,and immune response after an ex vivo lipopolysaccharide challenge[J].Journal of Animal Science,2012,90(2):505-514.

[26] LEONARD S G,SWEENEY T,BAHAR B,et al.Effects of dietary seaweed extract supplementation in sows and post-weaned pigs on performance,intestinal morphology,intestinal microflora and immune status[J].British Journal of Nutrition,2011,106(5):688-699.

[27] 王志龙,武洪志,王芳芳,等.大豆异黄酮和黄芪多糖对哺乳母猪生产性能、血清生化和免疫指标以及乳成分的影响[J].动物营养学报,2016,28(12):3970-3976.
[28] TUMMARUK P.Post-parturient disorders and backfat loss in tropical sows in relation to backfat thickness before farrowing and postpartum intravenous supportive treatment[J].Asian-Australasian Journal of Animal Sciences,2013,26(2):171-177.

[29] STRATHE A V,BRUUN T S,HANSEN C F.Sows with high milk production had both a high feed intake and high body mobilization[J].Animal:An International Journal of Animal Bioscience,2017.DOI:10.1017/S1751731117000155.
[30] KIS R K,BILKEI G.Effect of a phytogenic feed additive on weaning-to-estrus interval and farrowing rate in sows[J].Journal of Swine Health and Production,2003,11(6):296-299.
[31] WANG G Y,YANG C W,YANG Z B,et al.Effects of dietary star anise (Illicium verum Hook f) supplementation during gestation and lactation on the performance of lactating multiparous sows and nursing piglets[J].Animal Science Journal,2015,86(4):401-407.

[32] 李雪艳,杨在宾,姜淑贞,等.妊娠后期和泌乳期日粮添加生姜、八角和丹参对母猪抗氧化性能和繁殖性能的影响[J].中国畜牧兽医,2016,43(1):134-139.
[33] LEE S D,KIM J H,JUNG H J,et al.The effect of ginger extracts on the antioxidant capacity and IgG concentrations in the colostrum and plasma of neo-born piglets and sows[J].Livestock Science,2013,154(1/2/3):117-122.
[34] FARMER C,LAPOINTE J,CORMIER I.Providing the plant extract silymarin to lactating sows:effects on litter performance and oxidative stress in sows[J].Animal,2017,11(3):405-410.

[35] ARIZA-NIETO C,BANDRICK M,BAIDOO S K,et al.Effect of dietary supplementation of oregano essential oils to sows on colostrum and milk composition,growth pattern and immune status of suckling pigs[J].Journal of Animal Science,2011,89(4):1079-1089.

[36] ILSLEY S E,MILLER H M,KAMEL H M R.Plant extracts as supplements for lactating sows:effects on piglet performance,sow food intake and diet digestibility[J].Animal Science,2003,77(2):247-254.
[37] WANG Q,KIM H J,CHO J H,et al.Effects of phytogenic substances on growth performance,digestibility of nutrients,faecal noxious gas content,blood and milk characteristics and reproduction in sows and litter performance[J].Canadian Journal of Economics and Political Science,2008,17(1):362-378.
[38] MATYSIAK B,JACYNO E,KAWECKA M,et al.The effect of plant extracts fed before farrowing and during lactation on sow and piglet performance[J].South African Journal of Animal Science,2012,42(1):15-21.
[39] BALASUBRAMANIAN B,PARK J W,KIM I H,et al.Evaluation of the effectiveness of supplementing micro-encapsulated organic acids and essential oils in diets for sows and suckling piglets[J].Italian Journal of Animal Science,2016,15(4):626-633.

[40] LIU W C,YUN H M,PI S H,et al.Supplementing lactation diets with herbal extract mixture during summer improves the performance of sows and nursing piglets[J].Annals of Animal Science,2017.DOI:https://doi.org/10.1515/aoas-2016-0084
[41] LIPI ? SKI? K,SKÓRKO-SAJKO H,ANTOSZKIEWICZ Z,et al.A note on the effect of dietary supplementation with herbal extracts on sow and litter performance[J].South African Journal of Animal Science,2014,44(2):110-113.

[42] SHOJI Y,NAKASHIMA H.Nutraceutics and delivery systems[J].Journal of Drug Targeting,2004,12(6):385-391.

[43] SUNTRES Z E,COCCIMIGLIO J,ALIPOUR M.The bioactivity and toxicological actions of carvacrol[J].Critical reviews in food science and nutrition,2015,55(3):304-318.

[44] 敖江涛,郑溜丰,彭健.进程性氧化应激对母猪繁殖性能的影响及其营养调控[J].动物营养学报,2016,28(12):3735-3741.
[45] RUBIOLO J A,MITHIEUX G,VEGA F V.Resveratrol protects primary rat hepatocytes against oxidative stress damage:activation of the Nrf2 transcription factor and augmented activities of antioxidant enzymes[J].European Journal of Pharmacology,2008,591(1/2/3):66-72.
[46] AZIZ M,KARBOUNE S.Natural antimicrobial/antioxidant agents in meat and poultry products as well as fruits and vegetables:a review[J].Critical Reviews in Food Science and Nutrition,2016.DOI:10.1080/10408398.2016.1194256
[47] XIAO Z P,PENG Z Y,PENG M J,et al.Flavonoids health benefits and their molecular mechanism[J].Mini Reviews in Medicinal Chemistry,2011,11(2):169-177.

[48] RAINS J L,JAIN S K.Oxidative stress,insulin signaling,and diabetes[J].Free Radical Biology & Medicine,2011,50(5):567-575.

[49] MOSNIER E,LE FLOC'H N,ETIENNE M,et al.Reduced feed intake of lactating primiparous sows is associated with increased insulin resistance during the peripartum period and is not modified through supplementation with dietary tryptophan[J].Journal of Animal Science,2010,88(2):612-625.

[50] KOREN O,GOODRICH J K,CULLENDER T C,et al.Host remodeling of the gut microbiome and metabolic changes during pregnancy[J].Cell,2012,150(3):470-480.

[51] KRISHNA G,DIVYASHRI G,PRAPULLA S G,et al.A Combination supplement of fructo-and xylo-oligosaccharides significantly abrogates oxidative impairments and neurotoxicity in maternal/fetal milieu following gestational exposure to acrylamide in rat[J].Neurochemical Research,2015,40(9):1904-1918.

[52] ROOKS M G,GARRETT W S.Gut microbiota,metabolites and host immunity[J].Nature Reviews Immunology,2016,16(6):341-352.

[53] JONES R M,MERCANTE J W,NEISH A S.Reactive oxygen production induced by the gut microbiota:pharmacotherapeutic implications[J].Current Medicinal Chemistry,2012,19(10):1519-1529.

[54] MARTÍN R,SUÁREZ J E.Biosynthesis and degradation of H
2O
2 by vaginal lactobacilli[J].Applied and Environmental Microbiology,2010,76(2):400-405.

[55] ALVAREZ L A,KOVA ? I ? L,RODRÍGUEZ J,et al.NADPH oxidase-derived H
2O
2 subverts pathogen signaling by oxidative phosphotyrosine conversion to PB-DOPA[J].Proceedings of the National Academy of Sciences of the United States of America,2016,113(37):10406-10411.

[56] ZHANG J C,XU C B,HUO D X,et al.Comparative study of the gut microbiome potentially related to milk protein in Murrah buffaloes (Bubalus bubalis) and Chinese Holstein cattle[J].Scientific Reports,2017,7:42189.
[57] KNUDSEN K E B,HEDEMANN M S,L?RKE H N.The role of carbohydrates in intestinal health of pigs[J].Animal Feed Science and Technology,2012,173(1/2):41-53.
[58] BOMA M H,BILKEI G.Gross pathological findings in sows of different parity,culled due to recurring swine urogenital disease (SUGD) in Kenya[J].Onderstepoort Journal of Veterinary Research,2006,73(2):139-142.
[59] CUSHNIE T P T,CUSHNIE B,LAMB A J.Alkaloids:an overview of their antibacterial,antibiotic-enhancing and antivirulence activities[J].International Journal of Antimicrobial Agents,2014,44(5):377-386.

[60] ZOU Y,XIANG Q,WANG J,et al.Oregano essential oil improves intestinal morphology and expression of tight junction proteins associated with modulation of selected intestinal bacteria and immune status in a pig model[J].BioMed Research International,2016,2016:5436738.
[61] MUSHTAQ S,RATHER M A,QAZI P H,et al.Isolation and characterization of three benzylisoquinoline alkaloids from Thalictrum minus L. and their antibacterial activity against bovine mastitis[J].Journal of Ethnopharmacology,2016,193:221-226.
[62] LI C Y,MENG Y H,YING Z M,et al.Three novel alkaloids from Portulaca oleracea L. and their anti-inflammatory effects[J].Journal of Agricultural and Food Chemistry,2016,64(29):5837-5844.

[63] TRAN H T T,MÁRTON M R,HERZ C,et al.Nasturtium (Indian cress,Tropaeolum majus nanum) dually blocks the COX and LOX pathway in primary human immune cells[J].Phytomedicine,2016,23(6):611-620.

[64] ZHAO X,LACASSE P.Mammary tissue damage during bovine mastitis:causes and control[J].Journal of Animal Science,2008,86(13S):57-65.
[65] 韩杰,张飞,边连全.刺五加多糖对免疫应激断奶仔猪免疫器官指数、粪便微生物菌群数量和胃肠道pH的影响[J].动物营养学报,2014,26(8):2314-2319.
[66] CHAUHAN P S,SATTI N K,SURI K A,et al.Stimulatory effects of Cuminum cyminum and flavonoid glycoside on Cyclosporine-A and restraint stress induced immune-suppression in Swiss albino mice[J].Chemico-Biological Interactions,2010,185(1):66-72.