Francisco Peñagaricano
Francisco Peñagaricano
Current evidence suggests that dairy bull fertility is influenced by genetic factors, and hence, it could be managed and improved by genetic means. There are major mutations that explain about 4% to 8% of the observed differences in concept...
Robert J Van Saun
Robert J Van Saun
Trace mineral nutrition of sheep often focuses on their greater susceptibility to copper toxicosis due to a lesser biliary excretion ability compared with other ruminants. Our understanding of sheep trace mineral requirements has improved f...
William S Swecker Jr,Robert J Van Saun
William S Swecker Jr
Robert B Corbett
Robert B Corbett
Veterinarians are often called upon to diagnose health-related issues on the farm that may be related to trace mineral deficiencies or toxicities. Trace mineral feeding rates are often not available due to the proprietary nature of the trac...
Common Toxicosis [0.03%]
常见中毒性疾病
John P Buchweitz,Rachel Sheffler,Birgit Puschner
John P Buchweitz
Veterinarians are often called upon to diagnose health-related issues on the farm that may be related to trace mineral deficiencies or toxicities. Trace mineral feeding rates are often not available due to the proprietary nature of the trac...
John J Wagner,Lily N Edwards-Callaway,Terry E Engle
John J Wagner
Trace minerals and vitamins are essential for optimizing feedlot cattle growth, health, and carcass characteristics. Understanding factors that influence trace mineral and vitamin absorption and metabolism is important when formulating feed...
Jennifer H Koziol
Jennifer H Koziol
Semen morphology evaluation in the field should always be performed at 1000× with oil immersion. The development of a spermiogram will aid the practitioner to interpret potential fertility of semen at the time of sampling as well as determ...
Jennifer H Koziol
Jennifer H Koziol
The cause of subfertility or poor fertility in naturally mated bulls should be differentiated from impotentia coeundi, generandi, or erigendi prior to ancillary semen evaluation. Bulls used for artificial insemination may undergo ancillary ...
Robert J Van Saun
Robert J Van Saun
Trace minerals are essential nutrients that have many biologic functions, many of which are related to metabolic activities, immune function, and antioxidant capacity. The pregnant dam provides essential nutrients to support fetal developme...
Vitamin and Trace Element Nutrition of Stocker Cattle on Small Grain and Winter Annual Pastures [0.03%]
小粒作物和冬季一年生牧草饲养育肥牛的维生素和微量元素营养状况
Paul A Beck,Jeffery O Hall
Paul A Beck
This article reviews the trace mineral and macro mineral content of small grain forages and the potential role in the health of cattle grazing the forages. Reasons for the variability of trace mineral content in small grain forages are disc...