[1] 农业农村部畜牧兽医局,全国畜牧总站.2020年肉牛产业发展形势与2021年展望[J].中国畜牧业,2021(2):40-42. Bureau of Animal Husbandry and Veterinary Medicine,Ministry of Agriculture and Rural Affairs,National Animal Husbandry Station.Development of beef cattle industry in 2020 and prospect in 2021[J].China Animal Industry,2021(2):40-42.(in Chinese)
[2] 曹兵海,张越杰,李俊雅,等.2020年度肉牛牦牛产业技术发展报告[J].中国畜牧杂志,2021,57(3):240-245. CAO B H,ZHANG Y J,LI J Y,et al.2020 beef cattle and yak industry technology development report[J].Chinese Journal of Animal Science,2021,57(3):240-245.(in Chinese)
[3] 刁其玉,杨茁萌,陈荆芬.草颗粒饲料在牛瘤胃内的降解与饲养价值[J].草业科学,2001,18(6):43-47. DIAO Q Y,YANG Z M,CHEN J F.Degradation in rumen and feeding value of pelletized forage and fodder for beef cattle[J].Pratacultural Science,2001,18(6):43-47.(in Chinese)
[4] 姚浪群,萨仁娜,佟建明,等.安普霉素对仔猪肠道微生物及肠壁组织结构的影响[J].畜牧兽医学报,2003,34(3):250-257. YAO L Q,SA R N,TONG J M,et al.Effect of apramycin on intestinal flora and intestinal morphology of piglets[J].Acta Veterinaria et Zootechnica Sinica,2003,34(3):250-257.(in Chinese)
[5] 唐程.干奶期母牛热应激对母牛和犊牛生长、生产性能及血液生化指标的影响[D].硕士学位论文.扬州:扬州大学,2020. TANG C.Effects of heat stress on growth,performance and blood biochemical indices of cows and calves during dry milking period[D].Master’s Thesis.Yangzhou:Yangzhou University,2020.(in Chinese)
[6] 左志,祁有鹏,董巧霞,等.复合秸秆颗粒替代玉米青贮饲料对肉牛肌肉脂肪沉积和脂肪酸的影响[J].草原与草坪,2021,41(1):103-112. ZUO Z,QI Y P,DONG Q X,et al.The effect of replacing corn silage with composite straw pellets on fat deposition and fatty acids in beef cattle[J].Grassland and Lawn,2021,41(1):103-112. (in Chinese)
[7] 高朝煜,王晶晶,邱清华,等.不同营养水平饲粮对热应激条件下育肥荷斯坦阉牛生长性能、瘤胃发酵及血液参数的影响[J].动物营养学报,2021,33(11):6555-6571. GAO C Y,WANG J J,QIU Q H,et al.Effects of diets with different nutrition levels on growth performance,rumen fermentation and blood parameters of fattening Holstein castrated cattle under heat stress[J].Acta Sinica Sinica,2021,33(11):6555-6571.(in Chinese)
[8] 赵佩荣,祁永锋,程中静.苜蓿干草饲喂方式对犊牛生长性能、瘤胃发酵和营养物质消化率的影响[J].中国饲料,2019(6):26-31. ZHAO P R,QI Y F,CHENG Z J.Effect of alfalfa hay feeding method on growth performance,rumen fermentation and nutrient digestibility of dairy calves[J].China Feed,2019(6):26-31.(in Chinese)
[9] 孙青松.不同品种肉牛小肠组织学差异性研究[D].硕士学位论文.长春:吉林农业大学,2011. SUN Q S.Study on the histological differences of the small intestine of different breeds of beef cattle[D].Master’s Thesis.Changchun:Jilin Agricultural University,2011.(in Chinese)
[10] 高娃.苏尼特羊小肠组织结构及黏膜免疫相关细胞分布的研究[D].硕士学位论文.呼和浩特:内蒙古农业大学,2010. GAO W.Study on the tissue structure of the small intestine of Sunite sheep and the distribution of mucosal immune-related cells[D].Master’s Thesis.Hohhot:Inner Mongolia Agricultural University,2010.(in Chinese)
[11] 曲星梅.断奶日龄和日粮营养水平对陕北白绒山羊消化代谢的影响[D].硕士学位论文.杨凌:西北农林科技大学,2019. QU X M.Effects of weaning age and dietary nutrition level on digestion and metabolism of northern Shaanxi white cashmere goats[D].Master’s Thesis.Northwest A&F University,2019. (in Chinese)
[12] 孙娟.育肥方式对呼伦贝尔及呼杜杂交羔羊消化道组织形态及酶活的影响[D].硕士学位论文.呼和浩特:内蒙古农业大学,2014. SUN J.The effect of fattening methods on the tissue morphology and enzyme activity of the digestive tract of
Hulunbuir and
Hudu hybrid lambs[D].Master’s Thesis.Hohhot:Inner Mongolia Agricultural University,2014.(in Chinese)
[13] 商振达,商鹏,刘锁珠,等.藏猪小肠形态、消化酶及微生物多样性研究[J].微生物学报,2021,61(3):655-666. SHANG Z D,SHANG P,LIU S Z,et al.Study on small intestine morphology,digestive enzymes and microbial diversity of Tibetan pigs[J].Acta Microbiologica Sinica,2021,61(3):655-666.(in Chinese)
[14] 张丽英.饲料分析及饲料质量检测技术[M].4版.北京:中国农业大学出版社,2016. ZHANG L Y.Feed analysis and quality test technology[M].4th ed.Beijing:China Agricultural University Press,2016.(in Chinese)
[15] 佚名.中华人民共和国农业行业标准——肉牛饲养标准(NY/T 815—2004)[J].湖南料,2006(5):14-18. Anon.The agricultural industry standard of the people’s republic of china-beef cattle feeding standard (NY/T 815—2004)[J].Hunan Feed,2006(5):14-18.(in Chinese)
[16] 杨胜.饲料分析及饲料质量检测技术[M].北京:北京农业大学出版社,1993. YANG S.Feed analysis and feed quality inspection technology[M].Beijing:Beijing Agricultural University Press,1993.(in Chinese)
[17] 中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.饲料中盐酸不溶灰分的测定:GB/T 23742—2009[S].北京:中国标准出版社,2009. General Administration of Quality Supervision,Inspection and Quarantine of the People’s Republic of China,Standardization Administration of the People’s Republic of China.Animal feeding stuffs-determination of ash insoluble in hydrochloric acid:GB/T 23742—2009[S].Beijing:Standards Press of China,2009.(in Chinese)
[18] 刘燕.饲料中添加紫花苜蓿鲜草对肉牛生长性能及养分表观消化率的影响[J].中国饲料,2019(3):38-40. LIU Y.Effects of alfalfa fresh feed on growth performance and nutrient apparent digestibility of beef cattle[J].China Feed,2019(3):38-40.(in Chinese)
[19] 汪成,马健,胡瑞,等.活性干酵母对西门塔尔杂交牛生长性能、营养物质表观消化率、瘤胃发酵参数及血清生化和抗氧化指标的影响[J].动物营养学报,2021,33(7):3925-3933. WANG C,MA J,HU R,et al.Effects of active dry yeast on growth performance,nutrient apparent digestibilities,rumen fermentation parameters and serum biochemical and antioxidant indexes of Simmental crossbred cattle[J].Chinese Journal of Animal Nutrition,2021,33(7):3925-3933.(in Chinese)
[20] SWATLAND H J.Internal fresnel reflectance from meat microstructure in relation to pork paleness and pH[J].Food Research International,1997,30(8):565-570.

[21] 王红枫,吴海霞,张黎黎,等.不同品种肉牛对蛋白质及中性洗涤纤维消化率的比较[J].当代畜牧,2011(11):30-31. WANG H F,WU H X,ZHANG L L,et al.Comparison of protein and neutral detergent fiber digestibility of different breeds of beef cattle[J].Contemporary Animal Husbandry,2011(11):30-31.(in Chinese)
[22] 金焰,徐艳,董瑞兰,等.营养水平和发酵果渣对断奶仔猪生长性能、血清生化指标和消化酶活性的影响[J].中国畜牧杂志,2021,57(8):187-192. JIN Y,XU Y,DONG R L,et al.Effects of nutrition level and fermented pomace on growth performance,serum biochemical indexes and digestive enzyme activities of weaned piglets[J].Chinese Journal of Animal Husbandry, 2021,57(8):187-192.(in Chinese)
[23] SILVA A M A,SILVA SOBRINHO A G,TRINDADE I A C M,et al.Food intake and digestive efficiency in temperate wool and tropic semi-arid hair lambs fed different concentrate:forage ratio diets[J].Small Ruminant Research,2004,55(1/3):107-115.
[24] 朱寿谦,李大彪,解湧芳,等.高产和低产奶牛不同泌乳阶段养分表观消化率、瘤胃发酵参数和乳品质的比较研究[J].饲料研究,2021,44(15):6-10. ZHU S Q,LI D B,XIE Y F,et al.Comparative study on apparent digestibility of nutrients,rumen fermentation parameters and milk quality of high-yielding and low-yielding dairy cows in different physiological periods[J].Feed Research,2021,44(15):6-10.(in Chinese)
[25] 卢广林,陈晓霞,杨文艳,等.遗传基础与日粮营养源结构对肉牛生产性能的影响[J].饲料研究,2011(11):1-3. LU G L,CHEN X X,YANG W Y,et al.The influence of genetic basis and dietary nutrient source structure on beef cattle performance[J].Feed Research,2011(11):1-3.(in Chinese)
[26] 李陇平,李托,朱海鲸,等.饲粮不同消化能水平对25-35 kg陕北白绒山羊公羔生长性能、营养物质表观消化率和血清生化指标的影响[J].动物营养学报,2021,33(11):6277-6289. LI L P,LI T,ZHU H J,et al.Effects of different dietary digestibility levels on growth performance,apparent digestibility of nutrients and serum biochemical indexes of 25 to 35 kg North
Shaanxi white cashmere goat male lambs[J].Journal of Animal Nutrition,2021,33(11):6277-6289.(in Chinese)
[27] 刘泽,严慧,杨若晨,等.不同配比全株玉米青贮与花生秧对小尾寒羊生长性能、养分表观消化率及能氮代谢的影响[J].饲料研究,2021,44(14):27-32. LIU Z,YAN H,YANG R C,et al.Effects of different proportions of whole corn silage and peanut seedlings on growth performance, apparent nutrient digestibility and energy and nitrogen metabolism of small-tailed
Han sheep[J].Feed Research,2021,44(14):27-32. (in Chinese)
[28] 林英庭,朱风华,王利华.羔羊消化酶发育规律及其影响因素[J].中国草食动物科学,2014(S1):16-21. LIN Y T,ZHU F H,WANG L H.Development of lamb digestive enzymes and its influencing factors[J].China Herbivore Science,2014(S1):16-21.(in Chinese)
[29] 刘月琴,王宝山,张英杰,等.日粮类型对小尾寒羊小肠消化酶活性影响的研究[J].中国草食动物,2004(S1):131-134. LIU Y Q,WANG B S,ZHANG Y J,et al.The effect of diet types on the activities of digestive enzymes in the small intestine of small-tailed
Han sheep[J].China Herbivores,2004(S1):131-134.(in Chinese)
[30] WANG Y M,HAN S J,ZHOU J Y,et al.Effects of dietary crude protein level and N-carbamylglutamate supplementation on nutrient digestibility and digestive enzyme activity of jejunum in growing pigs[J].Journal of Animal Science,2020,98(4):skaa088.
[31] MU C T,DING N,HAO X Y,et al.Effects of different proportion of buckwheat straw and corn straw on performance,rumen fermentation and rumen microbiota composition of fattening lambs[J].Small Ruminant Research,2019,181:21-28.
[32] 刘明,赵新钢,张灿,等.不同品种绵羊羔羊小肠形态和消化酶活性差异的研究[J].动物营养学报,2020,32(11):5322-5330. LIU M,ZHAO X G,ZHANG C,et al.Differences in small intestinal morphology and digestive enzyme activities of different breed lambs[J].Chinese Journal of Animal Nutrition,2020,32(11):5322-5330.(in Chinese)
[33] 陈鼎.小尾寒羊和滩羊肠道发育及其主要消化酶活性变化规律研究[D].硕士学位论文.杨凌:西北农林科技大学,2008. CHEN D.Regulation of intestine and its digestive enzymes activities between small-tailed
Han sheep and
Tan sheep[D].Master’s Thesis.Yangling:Northwest A & F University,2008.(in Chinese)
[34] 曲星梅,薛复来,黄晓瑜,等.断奶日龄和日粮营养水平对陕北白绒山羊小肠形态发育和消化酶活性的影响[J].中国农业科学,2019,52(19):3460-3470. QU X M,XUE F L,HUANG X Y,et al.Effects of weaning age and dietary nutritional levels on intestinal morphology and activity of digestive enzymes in 6-month-old
Shaanbei white cashmere goats[J].Scientia Agricultura Sinica,2019,52(19):3460-3470.(in Chinese)
[35] 孙洪新.羔羊小肠消化酶活性变化规律研究[D].硕士学位论文.保定:河北农业大学,2003. SUN H X.Stadies on the change of digestive enzymatic activities of small intestine in lamb[D].Master’s Thesis.Baoding:Hebei Agricultural University,2003.(in Chinese)
[36] 张英杰,刘月琴,冯仰廉.日粮对肉牛小肠pH值及胰蛋白酶活性的影响[J].中国草食动物,2000(1):8-9. ZHANG Y J,LIU Y Q,FENG Y L.Effects of diet on the pH value and trypsin activity of the small intestine of beef cattle[J].China Herbivores,2000(1):8-9.(in Chinese)
[37] 王斐然,何雅琴,王富伟,等.补饲全脂膨化大豆对奶牛生产性能和消化代谢的影响[J].动物营养学报,2021,33(10):5677-5689. WANG F R,HE Y Q,WANG F W,et al.Effects of full-fat puffed soybean supplementation on the production performance and digestion and metabolism of dairy cows[J].Acta Sinica Sinica,2021,33(10):5677-5689.(in Chinese).
[38] 沈美英.日粮内不同粗饲料品质对绵羊瘤胃发酵功能和微生物区系的影响[D].硕士学位论文.呼和浩特:内蒙古农业大学,2006. SHEN M Y.The effect of different forage quality on rumen fermentation and microflora of sheep[D].Master’s Thesis.Hohhot:Inner Mongolia Agricultural University,2006.(in Chinese)
[39] 周瑞.牛至精油对羔羊胃肠道结构和功能及其微生物多样性的影响[D].博士学位论文.兰州:甘肃农业大学,2019. ZHOU R.The effects of oregano essential oil on gastrointestinal tract structure,function and microbiota diversity of lambs[D].Ph.D.Thesis.Lanzhou:Gansu Agricultural University,2019.(in Chinese)
[40] 李玉.不同植物蛋白含量代乳粉对早期断奶犊牛胃肠组织形态的影响[D].硕士学位论文.杨凌:西北农林科技大学,2009. LI Y.Effect of different vegetable protein levels in milk replacers on stomach and intestine morphology of early-weaned dairy calves[D].Master’s Thesis.Yangling:Northwest A & F University,2009.(in Chinese)
[41] 王可鑫,左丽君,陈想,等.包膜丁酸钠对脂多糖刺激下断奶羔羊血清炎性细胞因子、肠道通透性及肠道组织形态的影响[J].动物营养学报,2021,33(2):954-964. WANG K X,ZUO L J,CHEN X,et al.Effects of coated sodium butyrate on serum inflammatory cytokines,intestinal permeability and intestinal morphology of weaned lambs challenged with lipopolysaccharide[J].Chinese Journal of Animal Nutrition,2021,33(2):954-964.(in Chinese)
[42] 张科,李碧波,杨雨鑫,等.0-56日龄陕北白绒山羊胃肠道组织形态发育探究[J].中国畜牧杂志,2017,53(7):72-76. ZHANG K,LI B B,YANG Y X,et al.Study on the morphological development of the gastrointestinal tract in the northern
Shaanxi white cashmere goats from 0 to 56 days of age[J].Chinese Journal of Animal Husbandry,2017,53(7):72-76. (in Chinese)
[43] TANG M,LAARVELD B,VAN KESSEL A G,et al.Effect of segregated early weaning on postweaning small intestinal development in pigs[J].Journal of Animal Science,1999,77(12):3191-3200.

[44] 顾宪红,张宏福,佘锐萍,等.断奶日龄对仔猪肠粘膜形态的影响[J].畜牧兽医学报,2001,32(4):306-313. GU X H,ZHANG H F,SHE R P,et al.Effect of weaning age on small intestine morphology in piglets[J].Acta Veterinaria et Zootechnica Sinica,2001,32(4):306-313.(in Chinese)
[45] GREER A W.Trade-offs and benefits: implications of promoting a strong immunity to gastrointestinal parasites in sheep[J].Parasite Immunolgy,2008,30(2):123-132.

[46] OWENS D,MCGEE M,BOLAND T.Effect of grass regrowth interval on intake,rumen digestion and nutrient flow to the omasum in beef cattle[J].Animal Feed Science and Technology,2008,146(1/2):21-41.
[47] 孙青松,张国梁,王利民,等.4个品种肉牛小肠绒毛结构的差异性研究[J].黑龙江畜牧兽医,2011(9):6-8. SUN Q S,ZHANG G L,WANG L M,et al.Differences in villi structure of small intestine among four varieties of beef cattles[J].Heilongjiang Animal Science and Veterinary Medicine,2011(9):6-8.(in Chinese)
[48] 王利民,孙青松,张惠,等.3个品种肉牛小肠组织结构差异性研究[J].吉林农业大学学报,2010,32(3):326-329. WANG L M,SUN Q S,ZHANG H,et al.Differences of tissue structure of small intestine among different varieties of beef cattle[J].Journal of Jilin Agricultural University,2010,32(3):326-329.(in Chinese)
[49] 宋恩亮,陈耀星,王子旭,等.利杂犊牛小肠各段长度与黏膜结构的发育学变化[J].动物医学进展,2006,27(5):66-70. SONG E L,CHEN Y X,WANG Z X,et al.Developmental changes on the lengths of different intestinal segments and the morphological structure of small intestinal mucosa in limisin-crossbred calf[J].Progress in Veterinary Medicine,2006,27(5):66-70.(in Chinese)