DSD 6.12 | Brachytic corn for increased production

The brachytic gene mutation results in corn that is shorter in stature but an improved digestibility profile. Through a reduction in intranode distance, the corn plant reduces indigestible fiber. Dr. Antonio Gallo, PhD ruminant nutritionist from Università Cattolica del Sacro Cuore and his team in Italy recently studied the impact of this gene mutation on the productivity of the dairy herd.

High quality, home grown forages allow dairy producers to maintain the competitive edge. By limiting the purchase of off-farm nutrients, forages possess the ability to advance or hold back a herd. When brachytic corn was fed, they found a yield increase of 3.8 lbs/cow/day. However, the higher producing animals did not consume more.

“This is likely due to a chemotactic effect,” Gallo describes. The team measured changes in the intake pattern which provided insight to future research questions for data to better understand how this phenomenon could have happened.

The quality of corn silage impacts the health and productivity of the dairy cow. Additionally, her intake behavior is impacted by the ration. As more dairy farms move toward robotic systems, maximizing the energy density of the PMR will directly impact productivity, perhaps brachytic corn is most important in these systems.

Listen in to understand how the brachytic corn variety might work in your operation.

Topics of discussion

1:24      Introduction of Dr. Antonio Gallo

Effect of silage from a new brachytic corn hybrid with a high harvest index on feeding behavior and performance of lactating dairy cows

DSD 6.11 | The sweet spot - Insemination timing for peak profit

With changes in the marketplace, coupled with increased reproductive performance of your herd there is an increased opportunity to improve net return. While breeding beef and sexed semen is no longer new, our industry has experienced a miscalculation of the ideal number of replacement heifers needed to optimize this model.

To ensure you’re on the right path, Megan Lauber , Dr. Paul Fricke and Dr. Victor Cabrera from University of WI recently completed work on a model of the interaction between 21-d Preg rate, semen type, days in milk and heifer survival to find the optimum window – known as the Insemination Eligibility Period (IEP). This metric will soon to be easily monitored with a tool available online.

Their model found $51.00 / head improvements in net return when all the metrics are optimized. Listen in for a comprehensive discussion about how to model your herd’s data to customize and therefore optimize your reproductive trajectory and financial success of the future.

Topics of discussion

1:33      Introduction of Megan Lauber  

An economic simulation model to assess the effect of the 21-day pregnancy rate, semen type, and heifer survival rate on the optimal insemination eligibility period for lactating dairy cows

Dr. Victor Cabrera’s TOOL website : https://dairymgt.cals.wisc.edu/tools.php

DSD 6.11 | The sweet spot - Insemination timing for peak profit

With changes in the marketplace, coupled with increased reproductive performance of your herd there is an increased opportunity to improve net return. While breeding beef and sexed semen is no longer new, our industry has experienced a miscalculation of the ideal number of replacement heifers needed to optimize this model.

To ensure you’re on the right path, Megan Lauber , Dr. Paul Fricke and Dr. Victor Cabrera from University of WI recently completed work on a model of the interaction between 21-d Preg rate, semen type, days in milk and heifer survival to find the optimum window – known as the Insemination Eligibility Period (IEP). This metric will soon to be easily monitored with a tool available online.

Their model found $51.00 / head improvements in net return when all the metrics are optimized. Listen in for a comprehensive discussion about how to model your herd’s data to customize and therefore optimize your reproductive trajectory and financial success of the future.

Topics of discussion

1:33      Introduction of Megan Lauber  

An economic simulation model to assess the effect of the 21-day pregnancy rate, semen type, and heifer survival rate on the optimal insemination eligibility period for lactating dairy cows

Dr. Victor Cabrera’s TOOL website : https://dairymgt.cals.wisc.edu/tools.php

Individual housing for pre-weaned calves has long been gold standard, since it was first introduced in the 40s. However, interest has emerged around paired and group housing for this phase of production. Intermittent research on this topic has been published over the past 25 years but has never been compiled, until now.

If your farm is considering paired or group housing, listen in for a compelling discussion about the impacts, perceived and measured, about how this calf development concept could impact the future of your herd.

Topics of discussion

1:25      Introduction of Dr. Katarina Buckova  

Invited review: A systematic review of the effects of pair housing on dairy calf welfare and productivity

DSD 6.9 | Surplus calves are a perishable commodity

This robust beef market is having a direct impact on the bottom line of dairy calf buyers and possesses the ability to radically impact dairymen’s bottom line long term through low all milk prices. This month we talk to researcher Dr. Sam Locke from The Ohio State University about a survey launched to help better understand the workings of the current calf buyers, jockeys and marketers.

All sectors of this parallel and complementary production stream must work together for the dairy industry to generate a stronger, longer - lasting foothold in the beef industry. If done well through this opportunity, the dairy surplus calf market will establish a foothold in the beef supply chain. Listen in to hear insightful quotes from these Midwest calf buyers to help maximize your operation’s innate revenue stream.

Topics of discussion

1:06       Paper Title: Understanding

#2xAg2030; #journalofdairyscience; #openaccess; #MODAIRY; #bullcalves; #beefondairy; #surpluscalves; #growers; #Calfjockey; #dairysciencedigest; #ReaganBluel

DSD 6.8 | That is where you should put your money

For years researchers have sought out to better understand control mechanisms for a successful transition into lactation from the dry period. We’ve learned changing body condition score during the dry period is not acceptable, but what if it changes during late lactation?  How does this impact energy partitioning for the next lactation?

Well managed high producing cows with high fertility might find themselves bred back in less than the “textbook ideal” condition score heading into the dry period. Can we alter the late lactation ration to successfully increase condition with little impact? Dr. Laura Hernandez from the University of Wisconsin worked with a team of researchers at the Forage Center to better understand what is happening if high energy is fed late in lactation through extensive data collection to determine the possible potential carry over effects for subsequent lactations.

Listen into this compelling discussion as we learn more about the “black box” we know as the transition dairy cow and what phase to invest in to maximize your return.

Topics of discussion

1:01       Goal of this month’s research

Effects of high-energy and low-energy diets during late lactation on the subsequent dry period and lactation of Holstein dairy cows

It’s always exciting to watch a group of replacement heifers develop and anticipate their performance in the milking string as the top genetics of your herd. There is just about nothing more devastating than freshening them in to find mastitis or even worse, a blind quarter. When a first calf heifer calves in with a high somatic cell count she is more likely to maintain the high count, and more likely to be culled.

Heifer mastitis, or intramammary infection (IMI), is a common affliction yet we know very little about what stage of production it occurs and how to best diagnosis the root of the problem.  Pamela Adkins, DVM at the University of Missouri worked with a team to capture culture samples from a variety of stages of heifer development to fabricate standard protocols for sample collection and help producers better understand how to circumvent this disease cycle for their herd.

Listen in to learn how to improve heifer development and limit the tragedy of damaged replacements.

Topics of discussion

1:51       Introduction of Dr. Pamela Adkins

Evaluation of intramammary infection status in dairy heifers using cisternal and teat end sampling techniques

DSD 6.6 | How much variability is allowable?

Timing of insemination is still one of the most common question Dr. Paul Fricke, Extension faculty for the University of Wisconsin, gets from farmers. This month he and coauthors Vanda Santos and Paulo Carvalho  discuss the ideal timing of insemination when using popular artificial insemination protocols and when producers use estrus detection devices.

Additionally, how does this change if you choose to use sexed semen or a straw of beef?

Listen in to learn how to improve the pregnancies / AI metric in YOUR herd.

Topics of discussion

1:36       Introduction of Dr. Paul Fricke, Vanda Santos and Paulo Carvalho

Featured Article:

Effect of timing of artificial insemination with conventional or sex-sorted semen on fertility of lactating dairy cows

For decades, ethanol production has generated affordable biproducts to feed. A new distilling method has generated a product with ~50% protein. Dr. Billy Brown, assistant professor of dairy science at Kansas State, wanted to understand how this feed would compare to soybean meal in a starter grain.

To test this he developed rations substituting soybean meal 1:1. Graduate student Rachel Skinner measured intake, growth, effiency and metabolic and digestive parameters to best understand if this product would work in post weaning phase of production.  

Topics of discussion

1:19       Introduction of Dr. Billy Brooks

Effects of a high-protein corn coproduct as a replacement for soybean meal in calf starter feed in the postweaning period

Most dairy farms are trying to push the envelope from the conventional 4L of milk replacer per day to a higher volume to support lean structural growth of replacement heifers. Concerns of ruminal leakage resulting in fermentation has been cited as a concern, but is that based on an incomplete picture?  We know microbial protein offers a nearly perfect alignment of amino acid requirements for the bovine, however nutrition programs have discounted milk replacer to exclusively providing rumen undegradable protein (RUP) – protein that skips the rumen and is absorbed in the abomasum.

Marcos Marcondes, researcher from the Miner Institute, wanted to see if feeding higher volumes would change the flow of protein and energy to the calf and the physiology of the rumen, due to leakage. To test this question he fed a standard rate and double rate of milk replacer with colbalt to mark and track the flow of digestion through preweaned animals.

Leakage was found in the rumen on both treatments, but the results were positive. Energy, in the form of volatile fatty acids, and microbial protein added to the fuel for these growing animals.  Listen in to better understand the kinetics of digestion and questions that still remain for this phase of production.

Topics of discussion

1:44       Introduction of Dr. Marcos Marcondes

Influence of different amounts of milk replacer on esophageal leakage, rumen fermentation characteristics, gastrointestinal tract passage rate, and microbial crude protein synthesis of nursling animals