[1] WEST J W.Effects of heat-stress on production in dairy cattle[J].Journal of Dairy Science,2003,86(6):2131-2144. [2] RHOADS M L, RHOADS R P, VANBAALE M J, et al.Effects of heat stress and plane of nutrition on lactating Holstein cows:Ⅰ. Production, metabolism, and aspects of circulating somatotropin[J]. Journal of Dairy Science,2009,92(5):1986-1997. [3] CHEN L, THORUP V M, KUDAHL A B, et al.Effects of heat stress on feed intake, milk yield, milk composition, and feed efficiency in dairy cows:A meta-analysis[J]. Journal of Dairy Science,2024,107(5):3207-3218. [4] OMINSKI K H, KENNEDY A D, WITTENBERG K M, et al.Physiological and production responses to feeding schedule in lactating dairy cows exposed to short-term, moderate heat stress[J]. Journal of Dairy Science,2002,85(4):730-737. [5] SULLIVAN K F, MADER T L.Managing heat stress episodes in confined cattle[J]. The Veterinary Clinics of North America Food Animal Practice,2018,34(2):325-339. [6] CHANG-FUNG-MARTEL J, HARRISON M T, BROWN J N, et al. Negative relationship between dry matter intake and the temperature-humidity index with increasing heat stress in cattle:A global meta-analysis[J]. International Journal of Biometeorology,2021,65(12):2099-2109. [7] CLARK J H, DAVIS C L.Future improvement of milk production:Potential for nutritional improvement[J]. Journal of Animal Science,1983,57(3):750-764. [8] MOORE C E, KAY J K, COLLIER R J, et al.Effect of supplemental conjugated linoleic acids on heat-stressed Brown Swiss and Holstein cows[J]. Journal of Dairy Science,2005,88(5):1732-1740. [9] SHWARTZ G, RHOADS M L, VANBAALE M J, et al.Effects of a supplemental yeast culture on heat-stressed lactating Holstein cows[J]. Journal of Dairy Science,2009,92(3):935-942. [10] CALAMARI L, ABENI F, CALEGARI F, et al.Metabolic conditions of lactating Friesian cows during the hot season in the Po Valley. 2. Blood minerals and acid-base chemistry[J]. International Journal of Biometeorology,2007,52(2):97-107. [11] BAUMGARD L H, RHOADS R P.Ruminant Nutrition Symposium:Ruminant production and metabolic responses to heat stress[J]. Journal of Animal Science,2012,90(6):1855-1865. [12] BAUMGARD L H, WHEELOCK J B, SANDERS S R, et al.Postabsorptive carbohydrate adaptations to heat stress and monensin supplementation in lactating Holstein cows[J]. Journal of Dairy Science,2011,94(11):5620-5633. [13] WHEELOCK J B, RHOADS R P, VANBAALE M J, et al.Effects of heat stress on energetic metabolism in lactating Holstein cows[J]. Journal of Dairy Science,2010,93(2):644-655. [14] O′BRIEN M D, RHOADS R P, SANDERS S R, et al. Metabolic adaptations to heat stress in growing cattle[J]. Domestic Animal Endocrinology,2010,38(2):86-94. [15] ELVINGER F, NATZKE R P, HANSEN P J.Interactions of heat stress and bovine somatotropin affecting physiology and immunology of lactating cows[J]. Journal of Dairy Science,1992,75(2):449-462. [16] STARKIE R L, HARGREAVES M, ROLLAND J, et al.Heat stress,cytokines, and the immune response to exercise[J]. Brain,Behavior,and Immunity,2005,19(5):404-412. [17] MITRA R, CHRISTISON G I, JOHNSON H D.Effect of prolonged thermal exposure on growth hormone (GH) secretion in cattle[J]. Journal of Animal Science,1972,34(5):776-779. [18] IGONO M O, JOHNSON H D, STEEVENS B J, et al.Effect of season on milk temperature, milk growth hormone, prolactin, and somatic cell counts of lactating cattle[J]. International Journal of Biometeorology,1988,32(3):194-200. [19] MCGUIRE M A, BEEDE D K, DELORENZO M A, et al.Effects of thermal stress and level of feed intake on portal plasma flow and net fluxes of metabolites in lactating Holstein cows[J]. Journal of Animal Science,1989,67(4):1050-1060. [20] JO J H, JALIL G N, KIM W S, et al.Effects of rumen-protected L-tryptophan supplementation on productivity, physiological indicators, blood profiles, and heat shock protein gene expression in lactating Holstein cows under heat stress conditions[J]. International Journal of Molecular Sciences,2024,25(2):1217. [21] LIN Y, SUN X X, HOU X M, et al.Effects of glucose on lactose synthesis in mammary epithelial cells from dairy cow[J]. BMC Veterinary Research,2016,12:81. [22] BELL A W, BAUMAN D E.Adaptations of glucose metabolism during pregnancy and lactation[J]. Journal of Mammary Gland Biology and Neoplasia,1997,2(3):265-278. [23] THREADGOLD L C, KUHN N J.Glucose-6-phosphate hydrolysis by lactating rat mammary gland[J]. The International Journal of Biochemistry,1979,10(8):683-685. [24] FAN C Y, SU D, TIAN H, et al.Liver metabolic perturbations of heat-stressed lactating dairy cows[J]. Asian-Australasian Journal of Animal Sciences,2018,31(8):1244-1251. [25] RHOADS R P, LA NOCE A J, WHEELOCK J B, et al. Alterations in expression of gluconeogenic genes during heat stress and exogenous bovine somatotropin administration[J]. Journal of Dairy Science,2011,94(4):1917-1921. [26] LINDINGER M I .Integrated nutraceutical - nutritional approaches to address equine leaky gut syndrome[J].Veterinary Science Research,2019,1(1):16. [27] HALL L W, DUNSHEA F R, ALLEN J D, et al.Evaluation of dietary betaine in lactating Holstein cows subjected to heat stress[J]. Journal of Dairy Science,2016,99(12):9745-9753. [28] YUE S M, WANG Z S, WANG L Z, et al.Transcriptome functional analysis of mammary gland of cows in heat stress and thermoneutral condition[J]. Animals,2020,10(6):1015. [29] SAFA S, KARGAR S, MOGHADDAM G A, et al.Heat stress abatement during the postpartum period:Effects on whole lactation milk yield, indicators of metabolic status,inflammatory cytokines, and biomarkers of the oxidative stress[J]. Journal of Animal Science,2019,97(1):122-132. [30] LACETERA N, BERNABUCCI U, SCALIA D, et al.Heat stress elicits different responses in peripheral blood mononuclear cells from Brown Swiss and Holstein cows[J]. Journal of Dairy Science,2006,89(12):4606-4612. [31] CAPUCO A V, ELLIS S E, HALE S A, et al.Lactation persistency:Insights from mammary cell proliferation studies[J]. Journal of Animal Science,2003,81(3):18-31. [32] STELWAGEN K, SINGH K.The role of tight junctions in mammary gland function[J]. Journal of Mammary Gland Biology and Neoplasia,2014,19(1):131-138. [33] WENG X, MONTEIRO A P A, GUO J, et al. Effects of heat stress and dietary zinc source on performance and mammary epithelial integrity of lactating dairy cows[J]. Journal of Dairy Science,2018,101(3):2617-2630. [34] 詹经纬,童津津,熊本海,等.奶牛乳腺健康与乳中体细胞数之间关系的研究进展[J]. 动物营养学报,2021,33(3):1299-1305. [35] ZEINHOM M M A, ABDEL A R L, MOHAMMED A N, et al. Impact of seasonal conditions on quality and pathogens content of milk in Friesian cows[J]. Asian-Australasian Journal of Animal Sciences,2016,29(8):1207-1213. [36] NASR M A F, EL-TARABANY M S.Impact of three THI levels on somatic cell count, milk yield and composition of multiparous Holstein cows in a subtropical region[J]. Journal of Thermal Biology,2017,64:73-77. [37] LUDOVICO A, MAION V B, BRONKHORST D E, et al.Losses in milk production and quality due to milk somatic cell count and heat stress of Holsteins cows in temperate climate[J]. Semina:Ciências Agrárias,2015,36(5):3455-3469. |