[1] HATEW B,PODESTA S C,VAN LAAR H,et al.Effects of dietary starch content and rate of fermentation on methane production in lactating dairy cows[J].Journal of Dairy Science,2015,98(1):486-499.

[2] BOERMAN J P,POTTS S B,VAN DE HAAR M J,et al.Milk production responses to a change in dietary starch concentration vary by production level in dairy cattle[J].Journal of Dairy Science,2015,98(7):4698-4706.

[3] MORALES R,PARGA J,SUBIABRE I,et al.Finishing strategies for steers based on pasture or silage plus grain and time on feed and their effects on beef quality[J].Ciencia E Investigacio'n Agraria,2015,42(1):1-2.

[4] MALEKKHAHI M,TAHMASBI A M,NASERIAN A A,et al.Effects of supplementation of active dried yeast and malate during sub-acute ruminal acidosis on rumen fermentation,microbial population,selected blood metabolites,and milk production in dairy cows[J].Animal Feed Science and Technology,2016,213:29-43.
[5] KLEEN J L,CANNIZZO C.Incidence,prevalence and impact of SARA in dairy herds[J].Animal Feed Science and Technology,2012,172(1/2):4-8.
[6] 王洪荣.反刍动物瘤胃酸中毒机制解析及其营养调控措施[J].动物营养学报,2014,26(10):3140-3148.
[7] GOLDER H M,CELI P,RABIEE A R,et al.Effects of grain,fructose,and histidine on ruminal pH and fermentation products during an induced subacute acidosis protocol[J].Journal of Dairy Science,2012,95(4):1971-1982.

[8] VALENTE T N P,SAMPAIO C B,LIMA E D S,et al.Aspects of acidosis in ruminants with a focus on nutrition:a Review[J].Journal of Agricultural Science,2017,9(3):90-97.

[9] ZEBELI Q,ASCHENBACH J R,TAFAJ M,et al.Invited review:role of physically effective fiber and estimation of dietary fiber adequacy in high-producing dairy cattle[J].Journal of Dairy Science,2012,95(3):1041-1056.

[10] 姚军虎,李飞,李发弟,等.反刍动物有效纤维评价体系及需要量[J].动物营养学报,2014,26(10):3168-3174.
[11] NASROLLAHI S M,ZALI A,GHORBANI G R,et al.Variability in susceptibility to acidosis among high producing mid-lactation dairy cows is associated with rumen pH,fermentation,feed intake,sorting activity,and milk fat percentage[J].Animal Feed Science and Technology,2017,228:72-82.
[12] SCHLAU N,GUAN L L,OBA M.The relationship between rumen acidosis resistance and expression of genes involved in regulation of intracellular pH and butyrate metabolism of ruminal epithelial cells in steers[J].Journal of Dairy Science,2012,95(10):5866-5875.

[13] PENNER G B,ASCHENBACH J R,GÄBEL G,et al.Epithelial capacity for apical uptake of short chain fatty acids is a key determinant for intraruminal pH and the susceptibility to subacute ruminal acidosis in sheep[J].The Journal of Nutrition,2009,139(9):1714-1720.

[14] SALIM J K,DILLON C R,SAGHAIAN S H,et al.Profitability of dairy cattle through precision livestock farming management practices[C]//Southern Agricultural Economics Association.[S.l.]:[s.n.],2005:1-15.
[15] 张元跃.营养试验中消除动物异质性的研究[J].动物营养学报,1998,10(2):59-63.
[16] MORGANTE M,STELLETTA C,BERZAGHI P,et al.Subacute rumen acidosis in lactating cows:an investigation in intensive Italian dairy herds[J].Journal of Animal Physiology and Animal Nutrition,2007,91(5/6):226-234.
[17] KLEEN J L,HOOIJER G A,REHAGE J,et al.Subacute ruminal acidosis in Dutch dairy herds[J].Veterinary Record,2009,164(22):681-684.

[18] 李飞.奶山羊亚急性瘤胃酸中毒模型构建与奶牛日粮CBI的优化[D].博士学位论文.杨凌:西北农林科技大学,2014:10-13.
[19] LI F,YANG X J,CAO Y C,et al.Effects of dietary effective fiber to rumen degradable starch ratios on the risk of sub-acute ruminal acidosis and rumen content fatty acids composition in dairy goat[J].Animal Feed Science and Technology,2014,189:54-62.
[20] YAZDI M H,MIRZAEI-ALAMOUTI H R,AMANLOU H,et al.Effects of heat stress on metabolism,digestibility,and rumen epithelial characteristics in growing Holstein calves[J].Journal of Animal Science,2016,94(1):77-89.

[21] MACMILLAN K,GAO X,OBA M.Increased feeding frequency increased milk fat yield and may reduce the severity of subacute ruminal acidosis in higher-risk cows[J].Journal of Dairy Science,2017,100(2):1045-1054.

[22] CASTILLO-LOPEZ E,WIESE B I,HENDRICK S,et al.Incidence,prevalence,severity,and risk factors for ruminal acidosis in feedlot steers during backgrounding,diet transition,and finishing[J].Journal of Animal Science,2014,92(7):3053-3063.

[23] DESNOYERS M,DUVAUX-PONTER C,RIGALMA K,et al.Effect of concentrate percentage on ruminal pH and time-budget in dairy goats[J].Animal,2008,2(12):1802-1808.

[24] GIGER-REVERDIN S,RIGALMA K,DESNOYERS M,et al.Effect of concentrate level on feeding behavior and rumen and blood parameters in dairy goats:relationships between behavioral and physiological parameters and effect of between-animal variability[J].Journal of Dairy Science,2014,97(7):4367-4378.

[25] MOHAMMED R,STEVENSON D M,WEIMER P J,et al.Individual animal variability in ruminal bacterial communities and ruminal acidosis in primiparous Holstein cows during the periparturient period[J].Journal of Dairy Science,2012,95(11):6716-6730.

[26] ASCHENBACH J R,PENNER G B,STUMPFF F,et al.Ruminant nutrition symposium:role of fermentation acid absorption in the regulation of ruminal pH[J].Journal of Animal Science,2011,89(4):1092-1107.

[27] ALLEN M S.Relationship between fermentation acid production in the rumen and the requirement for physically effective fiber[J].Journal of Dairy Science,1997,80(7):1447-1462.

[28] BROWN M S,KREHBIEL C R,GALYEAN M L,et al.Evaluation of models of acute and subacute acidosis on dry matter intake,ruminal fermentation,blood chemistry,and endocrine profiles of beef steers[J].Journal of Animal Science,2000,78(12):3155-3168.

[29] GAO X,OBA M.Relationship of severity of subacute ruminal acidosis to rumen fermentation,chewing activities,sorting behavior,and milk production in lactating dairy cows fed a high-grain diet[J].Journal of Dairy Science,2014,97(5):3006-3016.

[30] GIGERR-EVERDIN S,DESNOYERS M,DUVAUX-PONTER C,et al.Modelling within-day variability in feeding behaviour in relation to rumen pH:application to dairy goats receiving an acidogenic diet[M]//SAUVANT D,VAN MILGEN J,FAVERDIN P,et al,eds.Modelling nutrient digestion and utilisation in farm animals.Wageningen:Wageningen Academic Publishers,2015:121-129.
[31] MILLER-CUSHON E K,DEVRIES T J.Feed sorting in dairy cattle:causes,consequences,and management[J].Journal of Dairy Science,2017,100(5):4172-4183.

[32] GRETER A,DEVRIES T J.Effect of feeding amount on the feeding and sorting behaviour of lactating dairy cattle[J].Canadian Journal of Animal Science,2017,91(1):47-54.
[33] MUHAMMAD A U R,XIA C Q,CAO B H.Dietary forage concentration and particle size affect sorting,feeding behaviour,intake and growth of Chinese Holstein male calves[J].Journal of Animal Physiology and Animal Nutrition,2016,100(2):217-223.

[34] GREGORYB P,KARENA B.Variation in the susceptibility to ruminal acidosis:challenge or opportunity?[C]//Advances in Dairy Technology:Proceedings of the Western Canadian Dairy Seminar.[S.l.]:[s.n.],2010:173-187.
[35] 刘军花.亚急性瘤胃酸中毒对山羊瘤胃上皮屏障功能的影响及其机制[D].博士学位论文.南京:南京农业大学,2014:57-68.
[36] 胡红莲.奶山羊亚急性瘤胃酸中毒营养生理机制的研究[D].博士学位论文.呼和浩特:内蒙古农业大学,2008:2-15.
[37] STEELE M A,CROOM J,KAHLER M,et al.Bovine rumen epithelium undergoes rapid structural adaptations during grain-induced subacute ruminal acidosis[J].Regulatory,Integrative and Comparative Physiology,2011,300(6):1515-1523.

[38] KLEVENHUSEN F,HOLLMANN M,PODSTATZKY-LICHTENSTEIN L,et al.Feeding barley grain-rich diets altered electrophysiological properties and permeability of the ruminal wall in a goat model[J].Journal of Dairy Science,2013,96(4):2293-2302.

[39] LI S,KHAFIPOUR E,KRAUSE D O,et al.Effects of subacute ruminal acidosis challenges on fermentation and endotoxins in the rumen and hindgut of dairy cows[J].Journal of Dairy Science,2012,95(1):294-303.

[40] PENNER G B,TANIGUCHI M,GUAN L L,et al.Effect of dietary forage to concentrate ratio on volatile fatty acid absorption and the expression of genes related to volatile fatty acid absorption and metabolism in ruminal tissue[J].Journal of Dairy Science,2009,92(6):2767-2781.

[41] METZLER-ZEBELI BU,HOLLMANN M,SABITZER S,et al.Epithelial response to high-grain diets involves alteration in nutrient transporters and Na
+/K
+-ATPase mRNA expression in rumen and colon of goats[J].Journal of Animal Scienc