Zobrazeno 1 - 10
of 107
pro vyhledávání: '"R.L. Ax"'
Publikováno v:
The Professional Animal Scientist. 21:420-425
This study was designed to evaluate the effects of feeding two different volumes of colostrum immediately after birth on growth and lactational performance as growing heifers and lactating cows. Brown Swiss heifers were fed 2 L (n = 37) or 4 L (n = 3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::135d83511f4d2a2903d08947e6f94d16
https://doi.org/10.15232/s1080-7446(15)31240-7
https://doi.org/10.15232/s1080-7446(15)31240-7
Publikováno v:
Journal of Dairy Science. 83:1451-1455
Some dairy producers resist using bovine somatotropin (bST) beginning at 9 wk postpartum because of the concern that fertility is compromised. We conducted a trial with a total of 205 Holstein cows, 100 multiparous and 105 primiparous, to evaluate re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed6074473694b82f6309fd9c552a7d89
https://doi.org/10.3168/jds.s0022-0302(00)75016-8
https://doi.org/10.3168/jds.s0022-0302(00)75016-8
Publikováno v:
Theriogenology. 51:1587-1596
There are a number of options for hormonal management of post partum dairy cows; however, only a few studies have made direct comparisons of these programs in commercial herd settings. We compared reproductive management programs of 2 commercial dair
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe5ed4aab8f3fbdf9f9ab5fe0159e0f3
https://doi.org/10.1016/s0093-691x(99)00101-6
https://doi.org/10.1016/s0093-691x(99)00101-6
Autor:
C.A. Martel, Ricardo C. Chebel, Joao Lima, R.L. Ax, José E. P. Santos, R. Garcia, Paul M. Fricke, Jeffrey S. Stevenson, M.J. Al-Hassan
Publikováno v:
Journal of dairy science. 93(3)
Our objective was to determine the effect of exogenous progesterone (P4) during a timed artificial insemination (TAI) protocol on pregnancies per AI (P/AI) in dairy cows not previously detected in estrus. Lactating cows (n=3,248) from 7 commercial da
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44f4c1082b009f47dea4bdbb96f47ea1
https://pubmed.ncbi.nlm.nih.gov/20172212
https://pubmed.ncbi.nlm.nih.gov/20172212
Physiological responses in thermal stressed Jersey cows subjected to different management strategies
Publikováno v:
Journal of dairy science. 85(12)
The effects of cooling and recombinant bovine somatotropin (rbST) on milk yield, reproductive performance, and health of Jersey cattle during summer thermal stress were measured for 2 yr. Cows were assigned to one of two groups based upon days in mil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4c6b8978cb04d088c38ca3ee75df7bc
https://pubmed.ncbi.nlm.nih.gov/12512595
https://pubmed.ncbi.nlm.nih.gov/12512595
Publikováno v:
Journal of dairy science. 84(4)
In this study, we evaluated the effects of dietary supplementation at two stages of lactation with various levels of Mepron85 (M85) and M85 plus DL-methionine (DL-Met) on milk production and composition of Holstein and Brown Swiss cows fed an alfalfa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::498329cae16ea4bca130962cca53ec56
https://pubmed.ncbi.nlm.nih.gov/11352168
https://pubmed.ncbi.nlm.nih.gov/11352168
Publikováno v:
Theriogenology. 33:333
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87728861e67ba711f4436c27c3de5f0e
https://doi.org/10.1016/0093-691x(90)90757-k
https://doi.org/10.1016/0093-691x(90)90757-k
Autor:
W.H. Eyestone, R.L. Ax
Publikováno v:
Theriogenology. 22:109-125
Some morphological and endocrinological aspects of cystic follicles in cows, women, rats, and rabbits were reviewed. The etiology of follicular cysts remains a mystery, in part due to the difficulty of studying them during formation, particularly in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe8ccbe9754b36af3277ad354d41a811
https://doi.org/10.1016/0093-691x(84)90424-2
https://doi.org/10.1016/0093-691x(84)90424-2