[1] THOM E C.The discomfort index[J].Weatherwise, 1959, 12(2):57-61.

[2] BUFFINGTON D E, COLLAZO-AROCHO A, CANTON G H, et al.Black globe-humidity index (BGHI) as comfort equation for dairy cows[J].Transactions of the ASAE, 1981, 24(3):711-714.

[3] BAETA F C, MEADOR N F, SHANKLIN M D, et al.Equivalent temperature index at temperatures above the thermoneutral for lactating dairy cows[C]//The 1987 Summer Meeting of the American Society of Agricultural Engineers, St. Joseph:American Society of Agricultural Engineers, 1987.
[4] MADER T L, DAVIS M S, BROWN-BRANDL T.Environmental factors influencing heat stress in feedlot cattle[J].Journal of Animal Science, 2006, 84(3):712-719.

[5] GAUGHAN J B, MADER T L, HOLT S M, et al.A new heat load index for feedlot cattle[J].Journal of Animal Science, 2008, 86(1):226-234.

[6] MADER T L, JOHNSON L J, GAUGHAN J B.A comprehensive index for assessing environmental stress in animals[J].Journal of Animal Science, 2010, 88(6):2153-2165.

[7] DA SILVA R G.MAIA A S C, DE MACEDO COSTA L L.Index of thermal stress for cows (ITSC)under high solar radiation in tropical environments[J].International Journal of Biometeorology, 2015, 59(5):551-559.

[8] BERMAN A, HOROVITZ T, KAIM M, et al.A comparison of THI indices leads to a sensible heat-based heat stress index for shaded cattle that aligns temperature and humidity stress[J].International Journal of Biometeorology, 2016, 60(10):1453-1462.

[9] LEES J C, LEES A M, GAUGHAN J B.Developing a heat load index for lactating dairy cows[J].Animal Production Science, 2018, 58(8):1387-1391.

[10] WANG X S, GAO H D, GEBREMEDHIN K G, et al.A predictive model of equivalent temperature index for dairy cattle (ETIC)[J].Journal of Thermal Biology, 2018, 76:165-170.
[11] TUCKER C B, ROGERS A R, VERKERK G A, et al.Effects of Shelter and body condition on the behaviour and physiology of dairy cattle in winter[J].Applied Animal Behaviour Science, 2007, 105(1/3):1-13.
[12] FOURNEL S, ROUSSEAU A N, LABERGE B.Rethinking environment control strategy of confined animal housing systems through precision livestock farming[J].Biosystems Engineering, 2017, 155:96-123.
[13] RHOAD A O.The Iberia heat tolerance test for cattle[J].Tropical Agriculture, 1944, 21(9):162-164.
[14] BIANCA W.Rectal temperature and respiratory rate as indicators of heat tolerance in cattle[J].The Journal of Agricultural Science, 1963, 60(1):113-120.

[15] GAALAAS R F.A study of heat tolerance in Jersey cows[J].Journal of Dairy Science, 1947, 30(2):79-85.

[16] WALKER C A.Studies of the cattle of Northern Rhodesia:Ⅱ.The apocrine gland population of the skin of Northern Rhodesian cattle and its connexion with the heat toleration coefficient[J].The Journal of Agricultural Science, 1957, 49(4):401-404.

[17] VERNON E H, DAMON R A, Jr, HARVEY W R, et al.Relation of heat tolerance determinations to productivity in beef cattle[J].Journal of Animal Science, 1959, 18(1):91-94.

[18] AMAKIRI S F, FUNSHO O N.Studies of rectal temperature, respiratory rates and heat tolerance in cattle in the humid tropics[J].Animal Production, 1979, 28(3):329-335.
[19] DE LEÓN C, MANRIQUE C, MARTÍNEZ R, et al.Genomic association study for adaptability traits in four Colombian cattle breeds[J].Genetics and Molecular Research, 2019, 18(3):gmr18373.
[20] 邹霞青, 梁学武.婆闽牛耐热性能的研究[J].家畜生态, 1992, 15(4):23-25. ZOU X Q, LIANG X W.Study on the heat resistance of Bomin cattle[J].Ecology of Domestic Animal, 1992, 15(4):23-25.(in Chinese)
[21] BENEZRA M V.A new index for measuring the adaptability of cattle to tropical condition[J].Journal of Animal Science, 1954, 13(4):1015.
[22] BARROS D V, SILVA L K X, KAHWAGE P R, et al.Assessment of surface temperatures of buffalo bulls (
Bubalus bubalis) raised under tropical conditions using infrared thermography[J].Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2016, 68(2):422-430.

[23] BARROS D V, SILVA L K X, Jr.DE BRITO LOURENÇO J, et al.Evaluation of thermal comfort, physiological, hematological, and seminal features of buffalo bulls in an artificial insemination station in a tropical environment[J].Tropical Animal Health and Production, 2015, 47(5):805-813.

[24] JOHNSON H D, RAGSDALE A C, BERRY I L, et al.Effect of various temperature-humidity combinations on milk production of Holstein cattle[J].Agriculture Experiment Station Research, 1962, 791:1-39.
[25] JOHNSON H D.Environmental physiology and shelter engineering with special reference to domestic animals.LXVI, temperature-humidity effects including influence of acclimation in feed and water consumption of Holstein cattle:research bulletin 0846[R].Columbia:University of Missouri.Agricultural Experiment Station, 1963.
[26] BERRY I L, SHANKLIN M D, JOHNSON H D.Dairy shelter design based on milk production decline as affected by temperature and humidity[J].Transactions of the ASAE, 1964, 7(3):329-331.

[27] ARMSTRONG D V.Heat stress interaction with shade and cooling[J].Journal of Dairy Science, 1994, 77(7):2044-2050.

[28] JOHNSON H D.Environmental temperature and lactation (with special reference to cattle)[J].International Journal of Biometeorology, 1965, 9(2):103-116.

[29] RAVAGNOLO O, MISZTAL I, HOOGENBOOM G.Genetic component of heat stress in dairy cattle, development of heat index function[J].Journal of Dairy Science, 2000, 83(9):2120-2125.

[30] JI B Y, BANHAZI T, GHAHRAMANI A, et al.Modelling of heat stress in a robotic dairy farm.Part 1:thermal comfort indices as the indicators of production loss[J].Biosystems Engineering, 2020, 199:27-42.
[31] ZIMBELMAN R B, RHOADS R P, RHOADS M L, et al.A re-evaluation of the impact of temperature humidity index (THI) and black globe humidity index (BGHI) on milk production in high producing dairy cows[C]//Proceedings of the Southwest Nutrition and Management Conference, Savoy:ARPAS, 2009:158-169.
[32] HERBUT P, BIEDA W, ANGRECKA S.Influence of hygrothermal conditions on milk production in a free stall barn during hot weather[J].Animal Science Papers and Reports, 2015, 33(1):49-58.
[33] PINTO S, HOFFMANN G, AMMON C, et al.Critical THI thresholds based on the physiological parameters of lactating dairy cows[J].Journal of Thermal Biology, 2020, 88:102523.
[34] RENAUDEAU D, COLLIN A, YAHAV S, et al.Adaptation to hot climate and strategies to alleviate heat stress in livestock production[J].Animal, 2012, 6(5):707-728.

[35] BERNABUCCI U, BIFFANI S, BUGGIOTTI L, et al.The effects of heat stress in Italian Holstein dairy cattle[J].Journal of Dairy Science, 2014, 97(1):471-486.

[36] BERTOCCHI L, VITALI A, LACETERA N, et al.Seasonal variations in the composition of Holstein cow's milk and temperature-humidity index relationship[J].Animal, 2014, 8(4):667-674.

[37] HAMMAMI H, BORMANN J, M'HAMDI N, et al.Evaluation of heat stress effects on production traits and somatic cell score of Holsteins in a temperate environment[J].Journal of Dairy Science, 2013, 96(3):1844-1855.

[38] LAMBERTZ C, SANKER C, GAULY M.Climatic effects on milk production traits and somatic cell score in lactating Holstein-Friesian cows in different housing systems[J].Journal of Dairy Science, 2014, 97(1):319-329.

[39] VITALI A, SEGNALINI M, BERTOCCHI L, et al.Seasonal pattern of mortality and relationships between mortality and temperature-humidity index in dairy cows[J].Journal of Dairy Science, 2009, 92(8):3781-3790.

[40] MORTON J M, TRANTER W P, MAYER D G, et al.Effects of environmental heat on conception rates in lactating dairy cows:critical periods of exposure[J].Journal of Dairy Science, 2007, 90(5):2271-2278.

[41] SCHVLLER L K.Impact of heat stress on conception rate of dairy cows in the moderate climate[C]//World Buiatric Congress 2014.Cairns, Australia:[s.n.], 2014.
[42] MVSCHNER-SIEMENS T, HOFFMANN G, AMMON C, et al.Daily rumination time of lactating dairy cows under heat stress conditions[J].Journal of Thermal Biology, 2020, 88:102484.
[43] SORIANI N, PANELLA G, CALAMARI L.Rumination time during the summer season and its relationships with metabolic conditions and milk production[J].Journal of Dairy Science, 2013, 96(8):5082-5094.

[44] LINVILL D E, PARDUE F E.Heat stress and milk production in the South Carolina coastal plains[J].Journal of Dairy Science, 1992, 75(9):2598-2604.

[45] HERBUT P, ANGRECKA S.Relationship between THI level and dairy cows' behaviour during summer period[J].Italian Journal of Animal Science, 2018, 17(1):226-233.

[46] BERMAN A.Estimates of heat stress relief needs for Holstein dairy cows[J].Journal of Animal Science, 2005, 83(6):1377-1384.

[47] HERBUT P, ANGRECKA S, WALCZAK J.Environmental parameters to assessing of heat stress in dairy cattle-a review[J].International Journal of Biometeorology, 2018, 62(12):2089-2097.

[48] PINTO S, HOFFMANN G, AMMON C, et al.Influence of barn climate, body postures and milk yield on the respiration rate of dairy cows[J].Annals of Animal Science, 2019, 19(2):469-481.

[49] 徐明, 吴淑云, 黄常宝, 等.呼和浩特地区牛舍内温湿度变化规律和奶牛冷热应激判定[J].家畜生态学报, 2015, 36(2):54-60. XU M, WU S Y, HUANG C B, et al.Cold or heat stress determination of barn cows on temperature and humidity index in Hohhot[J].Acta Ecologae Animalis Domastici, 2015, 36(2):54-60.(in Chinese)
[50] NRC.A guide to environmental research on animals[S].Washington D.C.:National Academy of Science, 1971.
[51] THOM E C.Cooling-degree days[J].Air Conditioning, Heating and Ventilation, 1958, 55(7):65-72.
[52] OLIVEIRA J L, ESMAY M L.Systems model analysis of hot weather housing for livestock[J].Transactions of the ASAE, 1982, 25(5):1355-1359.

[53] BOURAOUI R, LAHMAR M, MAJDOUB A, et al.The relationship of temperature-humidity index with milk production of dairy cows in a Mediterranean climate[J].Animal Research, 2002, 51(6):479-491.

[54] HAHN G L.Dynamic responses of cattle to thermal heat loads[J].Journal of Animal Science, 1999, 77(Suppl.2):10-20.
[55] NIENABER J A, HAHN G L, EIGENBERG R A.Quantifying livestock responses for heat stress management:a review[J].International Journal of Biometeorology, 1999, 42(4):183-188.

[56] CARGILL B F, STEWART R E.Effect of humidity on total heat and total vapor dissipation of Holstein cows[J].Transactions of the ASAE, 1966, 9(5):702-712.

[57] BOHMANOVA J, MISZTAL I, COLE J B.Temperature-humidity indices as indicators of milk production losses due to heat stress[J].Journal of Dairy Science, 2007, 90(4):1947-1956.

[58] HAHN G, GAUGHAN J, MADER T, et al.Thermal indices and their applications for livestock environments[M]//DESHAZER J A.Thermal environment and livestock energetics.USA:American Society of Agricultural and Biological Engineers, 2009:113-130.
[59] BELLAGI R, MARTIN B, CHASSAING C, et al.Evaluation of heat stress on Tarentaise and Holstein cow performance in the Mediterranean climate[J].International Journal of Biometeorology, 2017, 61(8):1371-1379.

[60] KIBLER H H.Environmental physiology and shelter engineering with special reference to domestic animals.LXVII, thermal effects of various temperature-humidity combinations on Holstein cattle as measured by eight physiological responses:research bulletin 862[R].Columbia:University of Missouri, 1964:1-40.
[61] DIKMEN S, HANSEN P J.Is the temperature-humidity index the best indicator of heat stress in lactating dairy cows in a subtropical environment?[J].Journal of Dairy Science, 2009, 92(1):109-116.

[62] WANG X S, BJERG B S, CHOI C Y, et al.A review and quantitative assessment of cattle-related thermal indices[J].Journal of Thermal Biology, 2018, 77:24-37.
[63] AVENDAÑO-REYES L, ALVAREZ-VALENZUELA F D, CORREA-CALDERÓN A, et al.Effect of cooling Holstein cows during the dry period on postpartum performance under heat stress conditions[J].Livestock Science, 2006, 105(1/2/3):198-206.
[64] BIANCA W.Relative importance of dry- and wet-bulb temperatures in causing heat stress in cattle[J].Nature, 1962, 195:251-252.
[65] ST-PIERRE N R.COBANOV B, SCHNITKEY G.Economic losses from heat stress by US livestock industries[J].Journal of Dairy Science, 2003, 86(Suppl.S):E52-E77.
[66] DA SILVA R G, MAIA A S C.Principles of animal biometeorology[M].Dordrecht:Springer, 2013.
[67] HERBUT P, ANGRECKA S.Forecasting heat stress in dairy cattle in selected barn zones with the help of THI and THI
adj indexes[J].Annals of Animal Science, 2013, 13(4):837-848.

[68] VEISSIER I, VAN LAER E, PALME R, et al.Heat stress in cows at pasture and benefit of shade in a temperate climate region[J].International Journal of Biometeorology, 2018, 62(4):585-595.

[69] YAN G Q, LI H, ZHAO W Y, et al.Evaluation of thermal indices based on their relationships with some physiological responses of housed lactating cows under heat stress[J].International Journal of Biometeorology, 2020, 64(12):2077-2091.

[70] DEVOE K R, HOFF S J, RAMIREZ B C, et al.Climate dependent heat stress mitigation modeling for dairy cattle housing[C]//2017 ASABE Annual International Meeting.St. Joseph:American Society of Agricultural and Biological Engineers, 2017:1700981.
[71] SIPLE P A, PASSEL C F.Measurements of dry atmospheric cooling in subfreezing temperatures[J].Proceedings of the American Philosophical Society, 1945, 89(1):177-199.
[72] AMES D R, INSLEY L W.Wind-chill effect for cattle and sheep[J].Journal of Animal Science, 1975, 40(1):161-165.

[73] OSCZEVSKI R, BLUESTEIN M.The new wind chill equivalent temperature chart[J]. Bulletin of the American Meteorological Society, 2005, 86(10):1453-1458.

[74] VAN LAER E.Detection, consequences and prevention of thermal discomfort for cattle kept outdoors in Belgium[D].Ph.D. Thesis.Ghent:Ghent University, 2015.
[75] ANGRECKA S, HERBUT P.Conditions for cold stress development in dairy cattle kept in free stall barn during severe frosts[J].Czech Journal of Animal Science, 2015, 60(2):81-87