Oklahoma Farm Report masthead graphic with wheat on the left and cattle on the right.
Howdy Neighbors!
Ron Hays, Director of Farm and Ranch Programming, Radio Oklahoma Ag Network  |  2401 Exchange Ave, Suite F, Oklahoma City, Ok 73108  |  (405) 601-9211

advertisements
   
   
   
   
   
   
   

Agricultural News


Dr. Selk Offers Possible Breeding Alterations to Those Using Artificial Insemination in Very Warm Weather

Tue, 23 Apr 2019 17:58:41 CDT

Dr. Selk Offers Possible Breeding Alterations to Those Using Artificial Insemination in Very Warm Weather
Dr. Glenn Selk, Oklahoma State University Emeritus Extension Animal Scientist, offers herd health advice as part of the weekly series known as the "Cow Calf Corner" published electronically by Dr. Peel and Dr. Glenn Selk. Today, Dr. Selk writes about handling artificial insemination in very warm weather.

“As the breeding season for spring calving herds is getting underway, understanding heat stress in cattle takes on increased importance. Producers that choose to synchronize and then artificially inseminate replacement heifers or adult cows may have already started, or will begin the process in the next few weeks. If the hot weather arrives during the AI breeding season, some management and breeding alterations may be helpful.

“For years, producers that bred artificially upon detected standing estrus (heat), would wait 12 hours before breeding the female in heat. If she was first observed in standing heat in the morning she would be inseminated that evening. If she was first observed in standing heat in the evening she would be inseminated the following morning. (This was called the AM/PM rule of artificial insemination.) More recent extensive research with dairy cattle has indicated that there is no significant advantage to the AM/PM rule. Similar pregnancy rates have resulted from inseminating in the morning only compared to following the AM/PM rule. Plus new research at Oklahoma State University on the internal temperature of heat stressed cattle adds even more concern about handling and inseminating cattle in the evening.

“Research with rumen temperature boluses has shown that the core body temperature of beef cows peaks at 2 to 5 hours after the highest daytime temperature (Pye, Boehmer, and Wettemann. 2011 ASAS Midwest Abstracts Page 104; Abstract 285). On a hot spring/summer day the highest daytime temperature is often late afternoon. Therefore the peak body temperature of cattle will occur at 6 PM to 11 PM.   Elevated core body temperatures have been implicated from other research in reduced pregnancy rates in heat stressed cattle.

“Inseminating all cattle in the morning hours would avoid the heat stress of evening breeding. Some would be bred at first standing heat, others would be bred at the conventional 12 hours after standing heat.   If timed AI is the method of choice, cattle working (especially the actual insemination) should be scheduled for the morning hours.”


   

 

WebReadyTM Powered by WireReady® NSI

 


Top Agricultural News

  • Kansas State Explains The Old "Block" and Chain: How Farm Data Will Be Used on the Blockchain  Fri, 19 Jul 2019 17:41:03 CDT
  • Oklahoma Grain Elevator Cash Bids as of 2:00 p.m. Friday, July 19, 2019  Fri, 19 Jul 2019 16:34:23 CDT
  • Friday Market Wrap-Up with Justin Lewis  Fri, 19 Jul 2019 15:35:43 CDT
  • Michael Hooper Selected as ODAFF Agriculture Investigative Services Chief Agent   Fri, 19 Jul 2019 15:32:41 CDT
  • Afternoon Wrap-up with Dave Lanning  Fri, 19 Jul 2019 13:53:06 CDT
  • Update- R-CALF CEO Bill Bullard Responds to Our Monday Beef Buzz Regarding His Call for Mandatory COOL   Fri, 19 Jul 2019 12:41:54 CDT
  • Animal Activists Target Christian Faith and Church Communities to Advance Their Meatless Agenda  Fri, 19 Jul 2019 09:50:37 CDT
  • Atop the RON Rural Soapbox - Former Secretary John Block  Fri, 19 Jul 2019 08:59:16 CDT

  • More Headlines...

       

    Ron salutes our daily email sponsors!

    Oklahoma Ag Credit Oklahoma Farm Bureau National Livestock Credit P&K Equipment Tulsa Farm Show AFR Insurance Stillwater Milling KIS FUTURES, INC. Oklahoma Cattlemen's Association

    Search OklahomaFarmReport.com


       
       
    © 2008-2019 Oklahoma Farm Report
    Email Ron   |   Newsletter Signup   |    Current Spots   |    Program Links

    WebReady powered by WireReady® Inc.