Main page > News archive > Progut^® Info Letter 1/2009

15.10.2009

The effect of hydrolysed brewery yeast (Progut^®) on the performance of dairy cows. Farm tests in Finland 2008.

1.      Objective

The objective of the trial was to study the effect of hydrolysed brewery yeast Progut® on the milk, protein and fat yield of dairy cows.

2.      Materials and methods

Progut™ was mixed either in a compound feed or in a half-concentrate that was fed in combination with grains (barley, wheat or oats). The daily dose varied in different lactation phases from 7 to 18 grams per cow being on average about 10 grams. The basic roughage was grass silage.

3.      Conclusions

-          On average the difference to control was 1.8 kg per cow and day which remained quite the same during the whole lactation period.

-          The difference in the daily milk yield was 545 kg per year when calculated to 305 day lactation period.

-          The effect of Progut™ seemed to be the best with high and balanced supply of fermentable substrates in the diet.   

-          Addition of Progut™ in the diet increased significantly the % fat while the % protein remained quite the same. 

-          Due to increased milk yield and milk fat content the profitability of milk production was remarkably improved.