compared to cows fed sulphate trace minerals (see Figure 3). The hydroxy trace mineral group reached peak production sooner and produced 3.5 more litres of milk at the peak of lactation. The dynamics of lactation persistence in dairy cows indicate that 1 kg of extra milk at peak lactation is equal to 200 kg of extra milk per lactation. More recent studies have also resulted in a significant in- crease in milk and fat production in cows fed hydroxy trace minerals.


Figure 1 - Milk production in kg/day in cows supplemented with sulphates a mixture of sulphates and organic trace minerals or with IntelliBond Hydroxy trace minerals. 0.7


*


0.6 0.5 0.4 0.3 0.2 0.1 0.0


* * * * *


Figure 2 - NDF digestibility in cows fed sulphate trace mineral sources compared to hydroxy forms of trace minerals in dairy cows on a low


-4 -2 0 2 *Means within time points differ P=0.04


1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0


-4


0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0


-2 0 * * * * 4 6 Hours in rumen 8 10 12 *


forage diet and dairy cows on a high forage diet. 55.0% 50.0% 45.0% 40.0% 35.0% 30.0%


51.2% 49.8% 45.9% 43.0%


Diary By-product Diet 35% Forage


Sulphate 2 *Means within time points differ P=0.05 4 6 Hours in rumen


Figure 3 - Milk production in kg/day in cows supplemented with sulphates a mixture of sulphates and organic trace minerals or


* * ** * ** * -4 -2 0 2


*Means within time points differ P=0.05 **Means within time points differ P=0.10


4 IntelliBond Hydroxy trace minerals Hours in rumen


Sulphate 8


6 10 12


with IntelliBond Hydroxy trace minerals. 55 50 45 40 35 30


0 Sulphate 1 2 3 4 Sulphates/organic 5 6 7 8 9


Week relative to calving IntelliBond Hydroxy trace minerals


▶ DAIRY GLOBAL | Volume 9, No. 2, 2022 21 10 11 12 8 10 12


Diary Forage Diet 64% Forage


IntelliBond Hydroxy trace minerals


Increasing profitability Feed efficiency is an important driver of dairy farm prof- itability. Feeding hydroxy trace minerals compared with feeding sulphate trace minerals can significantly improve fibre digestibility within the ration, enabling cows to produce more milk from the same amount of feed. This benefit gained from feeding hydroxy trace minerals is achieved via the total replacement of sulphate trace minerals within the ration. The transition to lactation is a critical period in the pro- duction cycle of a dairy cow. Improving feed efficiency is one of the many ways to improve this transition. For more information about transition management, please visit healthylife.trouwnutriton.com.


Selko is the Feed Additive brand of Nutreco. Research references are available upon request.


Rumen soluble manganese (mg/l)


Rumen soluble zinc (mg/l)


Rumen soluble copper (mg/l)


kg/day


NDF Digestibility


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