Why’s and What-For’s of VFA Profiles

Chuck Zimmerman

Why has interest increased in testing for volatile fatty acid (VFA) profiles in silages? Because nutritionists are looking for ways to better fine-tune rations, and because laboratories have responded with advanced technologies in testing for VFA’s. Dr. Bill Mahanna, coordinator of global nutritional sciences for Pioneer Hi-Bred, provides a brief refresher on VFA’s. Citing Pioneer research, he offers observations on …

Audio, Feed, Forage Forum, Pioneer Hi-Bred, Podcast

Shifting the Blame for Milk Butterfat Depression

Chuck Zimmerman

Conventional wisdom has linked milk butterfat depression mostly to low fiber content. Theories on what creates this problem are now shifting, says Dr. Bill Mahanna, coordinator of global nutritional sciences for Pioneer Hi-Bred. Studies indicate that as a result of higher-energy silage corn rations, trans-fatty acids from oils in forages and grains may account for much of this depression. The …

Audio, Feed, Forage Forum, Pioneer Hi-Bred, Podcast

Vitreousness: Hard Facts Lead to Softened Concerns

Chuck Zimmerman

Among silage corn issues, vitreousness generates more noise than it deserves, says Dr. Bill Mahanna, coordinator of global nutritional sciences for Pioneer Hi-Bred. This is the hard starch on the outside of the corn kernel that develops late in maturity, contributing to high test weight. Bill says research based solely on dry corn at 15.5% moisture is not relevant to …

Audio, Feed, Forage Forum, Pioneer Hi-Bred, Podcast