At Tintur Holsteins Dairy on the Cappoquin Estate, Nutritionally Improved Straw (NIS) has proved to be an essential factor in achieving their goal of maximising milk solids per hectare.
NIS is a pelleted form of alkali treated straw. The alkaline treatment improves the digestibility of straw by 50%. The pelleting significantly reduces sorting, promoting a much more consistent ration.
Since adding NIS to the diet in the 265 cow Holstein herd at Tintur Dairy, rumen health has improved markedly. This has helped increase dry matter intakes, whilst also enabling cows to utilise the ration more effectively. As a result, the herd has been able to respond to the farm’s push for more yield and milk solids, leading to a 20% increase in milk solids to 711kg per cow per year in 2017 (see table). Cow body condition has also benefitted, allowing the farm to cut protein levels in the cake by over 1%.
In 2015/16, the picture was completely different. That year, herd manager, Roger Barkley had decided to cut and bale fresh grass and feed straight to the cows after silage stocks ran out following poor weather and high stock numbers. So taken was he by the system, that he chose to fully implement zero grazed grass in the belief this would make better use of the farm’s grassland.
The cows were happier and we were getting more forage into them and they were milking very well, but we needed to boost butterfats.
The bubbly pea soup (loose dung) finished within two days and gradually the solids started to improve and cows stopped losing condition. It’s been a very good, up hill experience ever since. It’s very visible on our milk production graphs, at milk recording and very visible on our milk cheque.
NIS is fed throughout zero grazing which runs from the end of February until mid December, depending on conditions. During this time, Mr Barkley will vary the level of NIS in the diet depending on weather conditions and grass quality each day. For example, on wet days, when grass is lush or there’s lots of clover in a field, more NIS will be incorporated.
“I walk the high yielders daily and look at the dungs, if they’re too firm, I reduce NIS and if it’s too loose, I’ll increase NIS. I can go up and down by 0.25-1kg weekly,” Mr Barkley explains.
Cows are split into low and high yielding groups. A typical high yielding diet will include 15-16kg zero grazed grass, with 3kg NIS, 8kg of blend and 14kg of water fed as a TMR, topped up with parlour feed on a feed to yield basis.
Now, wastage is a thing of the past, with cows “licking clean” the passageway within three hours.
“The difference with NIS and chopped straw is that straw dries out – even with the water – so you get reduced intakes. With NIS, it mixes in with the water like a meal and it doesn’t take up so much valuable rumen space,” Mr Barkley adds.
Butterfats are now consistently above 3.65% with the herd hitting an average of 4.13% in 2017. Yields are also up. Mr Barkley highlights that forage quality was much better in 2017 than 2016 and that the business has been feeding to push production. However he believes the NIS has enabled the cow to use the ration better, enabling the herd to achieve 711kg MS/cow in 2017. This means overall production has increased, despite the unit milking less cows and using less land.
Mr Barkley adds: “Now the cows don’t loose condition when on the grass based diet. We also don’t have to have rebuild body condition at the end of lactation. We milked them down to 55 days before calving. Previously we were having to dry them off 85 days before calving to put condition on them so that’s an extra 25 days in milk due to better body condition.”
He is also convinced that improved cow health will impact on fertility, with cows already showing stronger heats. He is so sold on the benefits of NIS, that this winter he has chosen to continue feeding 1-1.5kg in the winter ration. This is mixed with chopped fodder beet to “soak up the juices” effectively and avoid wastage.
He concludes: “We’re refining the herd all of the time. Through breeding, selective culling and utilisation of forage and concentrate, we hope to achieve our target for 2018 of 750kg of milk solids a cow. My ultimate target is over 800kg. I think going forward, we’re going to knock those figures out the water and the NIS is helping with that.”
Benefits from feeding NIS at Tintur Holsteins
|Average bf (%)||3.98||4.13||+0.15|
|Average Prof (%)||3.50||3.48||-0.02|
|Average Solids (%)||7.48||7.61||+0.13|
|Average Yield/Cow/Day (L)**||21.30||25.25||+3.95|
|Milk Solids/Cow (kg)||594||711||+117|
|Milk Solids Sold (kg)||158,004||174,906||+16,902|
|Nominal Price MS (Euro/kg)||3.077||3.077|
|Sales MS/Ha (Euro)||3627||4338||+711|
**Inclusive of fattening cows
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