Journal Club Edition 1 – Reviewing RP – Lysine and Silage Cover Studies – Dr. Bill Weiss, The Ohio State University & Dr. Paul Kononoff, University of Nebraska, and Journal of Dairy Science Editor-In-Chief

Posted: September 7, 2021

Guests

Dr. Bill Weiss, The Ohio State University

Dr. Paul Kononoff, University of Nebraska, and Journal of Dairy Science Editor-In-Chief

Journal Club Edition 1: Reviewing RP-Lysine and Silage Cover Studies

Podcast Topic

We’re excited to introduce a new segment into our podcast rotation; The Journal Club. Styled after the traditional journal clubs convened at universities across the US, we’ll take a closer look at some of the newest research being published. Once a month we will welcome Dr. Bill Weiss, Emeritus Professor from The Ohio State University, to the pub table where we will discuss selected papers that were recently published. To gain additional insight and liven up the discussion, we’ll also invite the authors to join us whenever possible.

Timestamps

Dr. Bill Weiss introduced two papers that the guests would discuss throughout the episode. “Effects of rumen-protected lysine and histidine on milk production and energy and nitrogen utilization in diets containing hydrolyzed feather meal fed to lactating Jersey cows” published in June 2020 by Dr. Morris and Dr. Kononoff at the University of Nebraska. The second “Effect of sealing strategy on the feeding value of corn silage for growing dairy heifers” published in March 2021 from a lab at State University of Maringá in Brazil. (1:37)

Dr. Bill Weiss discussed the first paper about feather meal. He explained that feather meal is a bargain feed, however, you get more nutrients for a cheaper product. The research was also done on Jersey cattle instead of Holsteins which is unique as there is not as much research done on Jersey cattle. (7:06)

Dr. Paul Kononoff discussed feed bypass sources and milk performance while feeding feather meal within his study. He also discussed the variance in feed composition, for example, dry matter content, crude protein, and crude fat differences of feather meal. (11:17)

Dr. Paul Kononoff discussed a theory that one of his grad students (who was also an author on the paper) brought to his attention about methane production relating to rumen-protected lysine. (29:21)

Dr. Bill Weiss discussed the second study about feeding corn silage to dairy heifers. He explained the silage sealing and feeding processes used within the study. (41:11)

Dr. Paul Kononoff discussed palatability and animal behavior as it relates to the silage study. A producer has to consider the economics of affecting feed intake with picky animals. Is the saved cost worth a loss in intake? (47:06)

Chart Referenced as Table 7 on page 11 of the paper: https://tinyurl.com/ygoyq2gt

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