Milk - It's Nature's Health Food
Dairy products are one of the major sources of conjugated linoleic acid (CLA) providing a wide range of positive health benefits in the human diet.
A great deal of attention has been given to CLA due to its anticarcinogenic properties that include the reduction in the incidence and growth of tumors, antiobesity, enhancement of the immune system and the ability to prevent diabetes.
Dietary management of dairy cows to increase CLA in milk can be very beneficial for the consumer.
The Choice of Forage for Your Dairy
The CLA content in milk can be strongly influenced by the type of diet fed ,the breed of cows,their age as well as the type of supplements presented in the ration.Studies have shown that there is a positive effect on the CLA content in milk from pasture-based diets,however supplementing grain to cows grazing pasture decreases the CLA content of milk fat.Similarly,supplementing grain to cows fed grass silage or replacing conserved silage with corn silage lowered the CLA content of milk.
Corn silage can contain up to 50% grain reducing rumen ph and affecting microbial populations and rumen fermentation.It has been suggested that the main ruminal biohydrogenating bacteria are cellulolytic.A reduction in ruminal ph decreases the population of cellulolytic bacteria and other microbes for lipid biohdrogenation and the production of CLA and TVA.
Full Length Research article (see below)
Effects of different corn silage: Alfalfa silage ratios and full fat extruded soybeans on milk composition, conjugated linoleic acids content in milk fat and performance of dairy cows
This study focused on effect of forage
source and adding ESB on milk CLA content and milk production performance of dairy cows.
While this study found changes in milk yield and content similar to previous reports, the significant findings of this study were that, content of milk CLA was increased when CS was replaced by AS. Even higher CLA content in milk was obtained by using both ESB and AS in the diets. This research has resulted in increased recognition of the value of the use of alfalfa in diets of dairy cows in China and hence, increased its use.
Performance Of Cows Fed Diets Differing [...]
Microsoft Word document [50.0 KB]
Grasses have such high digestibilities and yet such effectiveness in the rumen compared to corn silage or alfalfa haylage.”
Microsoft Word document [28.5 KB]