[1] JAISWAL R S, SINGH J, MARSHALL L, et al. Repeatability of 2-wave and 3-wave patterns of ovarian follicular development during the bovine estrous cycle[J]. Theriogenology, 2009, 72(1):81-90.
[2] 寇红祥,赵福平,任康,等.奶牛体温与活动量检测及变化规律研究进展[J].畜牧兽医学报,2016,47(7):1306-1315.
KOU H X, ZHAO F P, REN K, et al. The progress on detection method and the regularities of body temperature and activities in dairy cows[J]. Acta Veterinaria et Zootechnica Sinica, 2016, 47(7):1306-1315. (in Chinese)
[3] HELMER S D, BRITT J H. Mounting behavior as affected by stage of estrous cycle in Holstein heifers[J]. J Dairy Sci, 1985, 68(5):1290-1296.
[4] FIRK R, STAMER E, JUNGE W, et al. Automation of oestrus detection in dairy cows:A review[J]. Livest Prod Sci, 2002, 75(3):219-232.
[5] FRICKE P M, CARVALHO P D, GIORDANO J O, et al. Expression and detection of estrus in dairy cows:The role of new technologies[J]. Animal, 2014, 8(S1):134-143.
[6] LÓPEZ-GATIUS F, SANTOLARIA P, MUNDET I, et al.Walking activity at estrus and subsequent fertility in dairy cows[J]. Theriogenology, 2005, 63(5):1419-1429.
[7] 李小俊,王振玲,陈晓丽,等.奶牛体温变化规律及繁殖应用研究进展[J].畜牧兽医学报,2016,47(12):2331-2341.
LI X J, WANG Z L, CHEN X L, et al. Study progress on the rule of body temperature and its application in reproduction of dairy cattle[J]. Acta Veterinaria et Zootechnica Sinica, 2016, 47(12):2331-2341. (in Chinese)
[8] MIURA R, YOSHIOKA K, MIYAMOTO T, et al. Estrous detection by monitoring ventral tail base surface temperature using a wearable wireless sensor in cattle[J]. Anim Reprod Sci, 2017, 180:50-57.
[9] YÁNIZ J L, SANTOLARIA P, GIRIBET A, et al. Factors affecting walking activity at estrus during postpartum period and subsequent fertility in dairy cows[J]. Theriogenology, 2006, 66(8):1943-1950.
[10] 寇红祥,李蓝祁,王振玲,等.牛发情期活动量与阴道黏液电阻值变化规律的研究[J].畜牧兽医学报,2017,48(7):1221-1228.
KOU H X, LI L Q, WANG Z L, et al. Study on the regulations of activity and vaginal electrical resistance of cattle during the estrous cycle[J]. Acta Veterinaria et Zootechnica Sinica, 2017, 48(7):1221-1228. (in Chinese)
[11] ROELOFS J B, VAN EERDENBURG F J C M, SOEDE N M, et al. Pedometer readings for estrous detection and as predictor for time of ovulation in dairy cattle[J]. Theriogenology, 2005, 64(8):1690-1703.
[12] 蒋晓新,刘炜,魏星远,等.运用计步器鉴定泌乳盛期荷斯坦奶牛的发情效果研究[J].安徽农业科学,2013,41(15):6728-6729,6732.
JIANG X X, LIU W, WEI X Y, et al. Study on the effects of identifying the estrus of holstein cows during peak lactation by using pedometer[J]. Journal of Anhui Agricultural Sciences, 2013, 41(15):6728-6729,6732. (in Chinese)
[13] SAULS J A, VOELZ B E, HILL S L, et al. Increasing estrus expression in the lactating dairy cow[J]. J Dairy Sci, 2017, 100(1):807-820.
[14] SILPER B F, ROBLES I, MADUREIRA A M L, et al. Automated and visual measurements of estrous behavior and their sources of variation in Holstein heifers.I:Walking activity and behavior frequency[J]. Theriogenology, 2015, 84(2):312-320.
[15] 李军,罗艳红,冯艳,等.陕西省千阳县奶牛计步器应用效果分析[J].中国乳业,2016(1):41-43.
LI J, LUO Y H, FENG Y, et al. Application effect analysis of Shanxi province of Qianyang by using pedometer[J]. China Dairy, 2016(1):41-43. (in Chinese)
[16] 郑伟,年景华,李军.奶牛计步器的应用效果分析[J].中国奶牛,2014(22):32-34.
ZHENG W, NIAN J H, LI J. Analysis on the application effect of cow pedometer[J]. China Dairy Cattle, 2014(22):32-34. (in Chinese)
[17] 蒋晓新,邓双义,魏星远,等.北方地区季节因素对荷斯坦奶牛步履数和奶牛泌乳性能的影响[J].江苏农业科学,2013,41(11):225-227.
JIANG X X, DENG S Y, WEI X Y, et al. Effects of seasonal factors on the step number of Holstein cows and milk performance of dairy cows in the Northern region[J]. Jiangsu Agricultural Sciences, 2013, 41(11):225-227. (in Chinese)
[18] VAN EERDENBURG F J, LOEFFLER H S, VAN VLIET J H. Detection of oestrus in dairy cows:A new approach to an old problem[J]. Vet Quart, 1996, 18(2):52-54.
[19] KIDDY C A. Variation in physical activity as an indication of estrus in dairy cows[J]. J Dairy Sci, 1977, 60(2):235-243.
[20] BREHME U, STOLLBERG U, HOLZ R, et al. ALT pedometer-New sensor-aided measurement system for improvement in oestrus detection[J]. Comput Electron Agric, 2008, 62(1):73-80.
[21] MADUREIRA A M L, SILPER B F, BURNETT T A, et al. Factors affecting expression of estrus measured by activity monitors and conception risk of lactating dairy cows[J]. J Dairy Sci, 2015, 98(10):7003-7014.
[22] 孙保贵,郭予伟,陈茂学,等.奶牛运动量辅助发情诊断参数的研究[J].中国畜牧杂志,2015,51(13):71-75.
SUN B G, GUO Y W, CHEN M X, et al. Study on estrus detection parameter based on activity record in lactating cows[J]. Chinese Journal of Animal Science, 2015, 51(13):71-75. (in Chinese)
[23] LOPEZ H, SATTER L D, WILTBANK M C. Relationship between level of milk production and estrous behavior of lactating dairy cows[J]. Anim Reprod Sci, 2004, 81(3-4):209-223.
[24] ISMAEL A, STRANDBERG E, BERGLUND B, et al. Seasonality of fertility measured by physical activity traits in Holstein cows[J]. J Dairy Sci, 2016, 99(4):2837-2848.
[25] SAKATANI M, TAKAHASHI M, TAKENOUCHI N. The efficiency of vaginal temperature measurement for detection of estrus in Japanese Black cows[J]. J Reprod Dev, 2016, 62(2):201-207.
[26] 陆静.第二代计步器的功能[C]//中国奶业协会年会.杭州, 2009:2.
LU J. The function of the second generation of pedometer[C]//China Dairy Association Annual Conference.Hangzhou, 2009:2. (in Chinese)
[27] TALUKDER S, KERRISK K L, INGENHOFF L, et al. Infrared technology for estrus detection and as a predictor of time of ovulation in dairy cows in a pasture-based system[J]. Theriogenology, 2014, 81(7):925-935. |