Total Digestible Nutrients and Protein Levels for Dairy Bulls Used in Artificial Breeding

Breeding Soundness Evaluation for Beef and Dairy Bulls - FSA-3046

The breeding soundness evaluation (BSE) is a practical method to identify bulls with less than satis­ factory breeding potential. This evalu­ ation should be conducted on every bull at least 30 to 60 days before each breeding season to allow enough time for replacement of deferred or unsatis­ factory bulls. The first step in a BSE is to select a veterinarian in your area who is competent in con...

Predicting microbial protein synthesis in beef cattle: relationship to intakes of total digestible nutrients and crude protein.

Prediction of microbial CP (MCP) synthesis in the rumen is an integral part of the MP system. For the NRC beef model, MCP is calculated as 0.13 multiplied by TDN intake (TDNI), with adjustment for physically effective NDF (peNDF) concentrations less than 20%. Despite its application for nearly 2 decades, MCP predictions using this approach have not been extensively evaluated. We assembled a dat...

Statistical considerations concerning the disposal of dairy bulls used for artificial insemination in Hokkaido from 1958 to 1979.

Impact of levels of total digestible nutrients on microbiome, enzyme profile and degradation of feeds in buffalo rumen

The present study was aimed at understanding a shift in rumen microbiome of buffaloes fed various levels of total digestible nutrients. To understand the process, the metagenomics of rumen microbes, in vivo and in vitro rumen fermentation studies were carried out. Three rumen fistulated adult male Murrah buffaloes were fed three isonitrogenous diets varying in total digestible nutrients (70, 85...

Breeding Soundness of Bulls

The importance of the bull in a cattle breeding program often is underestimated. A cow is responsible for half the genetic material in only one calf each year, while the bull is responsible for half the genetic material in 20 to 50 calves. The bull’s ability to locate cows in estrus and breed them is clearly vital to a successful breeding program. Bulls differ in physical appearance, fertility ...