It makes commercial sense to feed as much home grown protein and energy as possible, because protein and energy are the expensive nutrients to purchase, however there is currently a national problem with butter fat depression in herds being fed high levels of lush grass or high d-value silage. Clearly it is wasteful to feed high levels of forage unless it can be utilized efficiently in the rumen – in most cases efficient rumen function results in higher milk solids.
We have had many phone calls from farmers struggling with low butterfat levels when feeding high levels of 1st cut silage. In many cases a solution has been to reduce oil in the diet from non-forage sources and increase the forage fibre levels in the diet by including NIS.
Here is an article written by Dr Huw McConchie, Head of Dairy Services, Wynnstay. Please click on the image to see the full article.