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...
David G Pugh
David G Pugh
This article is an overview of trace mineral nutrition, disease association with dietary inadequacy of trace minerals, and the associated diseases in goats. The trace minerals most commonly associated with deficiency-related diseases encoun...
Jerry W Spears
Jerry W Spears
Several trace mineral sources, including inorganic, numerous organic, and hydroxychloride sources, are available for dietary supplementation or inclusion in a free-choice supplement. Inorganic forms of copper and manganese differ in their b...
William S Swecker Jr
William S Swecker Jr
Trace minerals are commonly supplemented in ruminant feeds as many common feeds are deficient in one or more of the trace minerals. The requirement of trace minerals needed to prevent classic nutrient deficiencies is well established, thus ...
Ian J Lean,Helen M Golder
Ian J Lean
While mineral requirements do not differ with the production systems, the forage bases of the different dairy production systems influence the risk of mineral deficiency. Testing representative pastures on a farm is a key to understanding t...
Trace Mineral Supplementation of Beef Cattle in Pasture Environments [0.03%]
pasture环境中肉牛的微量元素补充饲料研究
William S Swecker Jr
William S Swecker Jr
The United States Department of Agriculture defines pastureland as "A land cover/use category of land managed primarily for the production of introduced forage plants for livestock grazing." The purpose of this article is to review trace mi...
Ruminant Metabolic Diseases [0.03%]
反刍动物代谢病
Robert J Van Saun
Robert J Van Saun