tag:blogger.com,1999:blog-44416703762869587022024-10-02T03:50:35.086-04:00Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.comBlogger16125tag:blogger.com,1999:blog-4441670376286958702.post-3503043484169313002013-04-30T11:47:00.000-04:002013-04-30T11:47:34.813-04:00

It is well documented that parturition is a stressful period to cows. This can often result in peripartal disease and can lead to culling before lactation is even fully underway. Minimizing this eventuality is critical for the cow’s well being and farm profitability. Factors that compromise the cow’s immune system need to be eliminated or reduced.  Inflammation is commonly experienced during

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com1tag:blogger.com,1999:blog-4441670376286958702.post-15555735142547099412013-03-14T18:43:00.000-04:002013-03-15T10:43:18.305-04:00

On February 5th and 6th, the 24th Florida Ruminant Nutrition Symposium was held in Gainesville, FL. Several important topics were covered for both dairy and beef production. Presenters talked about immunity, environment, economics and nutrition. Dr. Richard Zinn challenged the audience to consider balancing the AA of the receiving diets fed to lightweight (particularly Holstein) steers for the

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-13648318649930312452013-01-11T12:42:00.002-05:002013-01-12T11:44:28.252-05:00

Research has shown cows fed methionine enriched diets produce more milk with better milk composition. Methionine is an essential amino acid that also plays other important metabolic functions. Immediately after calving the cow experiences a negative energy balance due to a relative low dry matter intake versus nutrient demands for high milk production. Body reserves are mobilized leading to

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-54992283534767916982012-11-14T15:00:00.000-05:002013-01-08T11:30:33.105-05:00

We often hear that cows fed AA balanced diets have better health and reproduction. A recent large dairy survey confirmed these reports. What is the scientific evidence to support these field observations? In the early lactation study reported in my previous SmartMail the authors also evaluated the impact of feeding an AA balanced, methionine enriched diet on embryo quality. Cows were

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-43043422738435105082012-09-09T15:30:00.000-04:002013-01-08T15:55:57.936-05:00

In the upcoming series of SmartMails we will be highlighting the findings from the Adisseo-sponsored research presented at this year's JAM conference in Phoenix. In the first paper (Abstract, Poster) presented by researchers at the Univ. of Wisconsin, the effect on milk performance of adding 12g of extra metabolizable methionine (MET) to a 16.2% CP diet was evaluated over the first 10 weeks

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-43566399726708462232012-08-03T16:00:00.000-04:002013-01-08T15:56:56.823-05:00

The ADSA/ASAS JAM Conference was held in Phoenix and again excellent new material was presented. Adisseo sponsored its Monday night reception for the fifth straight year. Dr. Juan Loor was our speaker and presented new material on "The value of microarrays to explain the positive impact of enriching transition cow diets with methionine". Nearly 150 people attended the reception and Dr. Juan

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-41989269471017301482012-02-22T15:00:00.000-05:002013-01-08T16:03:27.417-05:00

January 31st, 2012 - Gainesville, Florida Adisseo sponsored the Pre-Symposium at the 2012 Florida Ruminant Nutrition Symposium. The general theme was "Improving Efficiency of Nitrogen Utilization by Dairy Cows". We were privileged to have a great line-up of speakers. Below you'll find highlights from each speaker:  Larry E. Chase - Professor of Dairy Cattle Nutrition,

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-77037587590691210042011-12-19T15:37:00.001-05:002012-01-03T17:24:19.954-05:00

In the last Tech Note, the added benefits of balancing rations for AA to lower the N load of the diet and improve the efficiency of N utilization by the cow were discussed.Another benefit often overlooked is balancing rations for AA during the transition period. Methionine plays a key role in the formation of very low density lipoproteins (VLDLs). It is

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-71396279830899866852011-11-02T16:35:00.001-04:002012-01-03T17:28:32.540-05:00

In the past, Adisseo concentrated its efforts to highlight the importance of feeding an amino acid-balanced diet to improve milk composition, particularly milk protein content. AA formulation guidelines were based on results from extensive University research. However it is now clear that these advantages are only the tip of the iceberg. OneADDED benefit often overlooked is the improvement of the

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-61950753134054092802011-08-24T17:09:00.000-04:002012-01-03T17:37:46.094-05:00

Profitable milk production depends on efficient use of dietary protein. The target should be for 30% of Total N ingested to be converted to Productive N and for the Productive N/Urinary N ratio to be greater than 100%.Typically only 25% of N intake is incorporated into milk protein - in other words 75% is excreted in the urine and feces. Fecal N is relatively constant,

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-89712936834800623772011-07-26T15:06:00.009-04:002012-01-17T15:39:37.277-05:00

Under practical situations it is difficult to formulate to the optimal % of metabolizable Lysine (LYS) and metabolizable methionine (MET) as recommended by Whitehouse et al. (2009). In practice, the levels than can be achieved are closer to 97% of the optimal. The table below gives the practical target formulation levels for LYS and MET for each model.*97 % of OptimalThere are additional benefits

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-34011541866880681202011-06-15T14:35:00.000-04:002012-01-17T16:00:40.377-05:00

In the previous SmartMail we examined how feed’s Crude Protein (CP) is partitioned into different fractions by the NRC, CPM and CNCPS models. We also discussed how the biology in each model estimates the grams of metabolizable protein (MP) and its amino acid profile. It has long been recognized that it is not CP that the cow needs to satisfy requirements - it is the grams of amino acids in the

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-54350796186865994442011-05-18T14:29:00.002-04:002012-01-17T16:08:55.138-05:00

As models have evolved, the Crude Protein (CP) of an ingredient has been recognized as having different fractions with each fraction having a specific degradation rate (Kd). The relationship of the pool size of each fraction with its specific Kd linked to the rate of passage (Kp) defines the percentage of CP that is degraded in the rumen and the percentage that flows to the small intestine.

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-48184038661493596192011-04-29T13:39:00.004-04:002012-01-17T16:14:31.917-05:00

Basic knowledge of amino acid (AA) nutrition for lactating cows has significantly advanced in the last 50 years. However, only recently has that wisdom been harnessed into models that can be used on a day to day basis.In the U.S., the three basic models currently used are NRC 2001, CNCPS and CPM. Over time, they have all evolved and changed to include improved equations that predict the cow’s

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-31735034377661082852011-04-19T13:48:00.000-04:002013-02-25T11:08:00.011-05:00

Feeding strategies to improve the utilization of the nitrogen (N) in a diet are important to reduce N excretion to the environment. Amino acid (AA) balancing presents the opportunity to do so, without negatively impacting milk performance. By concentrating the levels of the limiting amino acids methionine and lysine in the diet, less metabolizable protein (MP) and crude protein (CP) needs to be

Daniel Luchini, Ph.D.http://www.blogger.com/profile/03514014618861131366noreply@blogger.com0tag:blogger.com,1999:blog-4441670376286958702.post-15429495493777165302011-04-18T12:28:00.000-04:002013-02-25T11:08:31.862-05:00

MetaSmart and Smartamine M are often compared to one another because they both supply methionine to the cow, but it is important to note that they are different products. MetaSmart is the isopropyl ester of HMB (methionine analog) and Smartamine M is based on a coated, true dl-methionine. The mode of action of the two products differs: A) MetaSmart benefits rumen function and provides

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