Thanks to altogether more pleasant conditions this Spring, farmers have enjoyed a welcome respite from the poor weather they worked through during the previous two years.

With cattle out earlier and, just as importantly, remaining out to graze in healthily growing paddocks, refilling forage reserves has not weighed on farmers’ minds nearly as heavily as it did during the first halves of 2023 and ’24.

Of course, when casting an eye five to six months down the line, refilling pits remains a significant consideration. But the better weather experienced in recent months means that farmers are in a better position to build up a reserve of high-quality silage with those (literally) cold and rainy days in mind.

As Teagasc has noted, grass digestibility decreases by 2 to 3% units per week from mid-May onwards. This is due to the increasing levels of stem in grass as the crop matures in addition to the accelerated decline in stem digestibility.

High quality silage permits flexibility in feed plans for both milkers and dry stock/dry cows. Earlier cutting, which recent conditions have facilitated, also permit quicker and earlier regrowths for subsequent cuts, which in turn leads to increased annual yield per hectare. The mean DMD of Irish silages comes in at approximately 69% DMD – which is well below the requirements of a lactating dairy cow.

At one point, every farm will have 80% DMD grass available to them in the field; however the decision is typically made too late regarding cutting date. Once seed heads appear by late May, DMD will be, at most, approximately 70% at, before declining by 1% DMD every two to three days after that. Each 1% increase achieved equates to a +0.33kg daily milk yield increase.

Farmers should also be aiming for a dry matter content of approximately 25%. Where wilting continues for long periods, grass quality will deteriorate, leading to significant energy losses. In ideal conditions, this will be achieved in a 24-hour wilt.

The use of a silage additive has long been proven to improve fermentation and lend to less waste/losses. Agritech’s GrasZyme Sugarboost is proven to: Increase ADG by 110g/head/day in beef situations and in dairy scenarios; Increase Dry Matter intakes by 0.4 kg/head/day, resulting in milk protein percentage increases of 0.09%. Fermentation losses are also reduced by an average of 6.1% where an additive is used (equating to 30t additional feed, in a 500t pit).

For further advice, contact your local Agritech Sales Advisor.

Many herds are currently engaged in drying off cows, as the focus shifts towards dry cow management across most farms. It’s also  important to consider nutrition plans when cows calve down this coming Spring, accounting for the following:

• A planned and well executed dry cow mineral programme.
• Calving down the cow in the correct Body Condition Scoring (BCS).
• Excellent animal husbandry in the week pre-and post-calving (no additional stressors).
• Careful transition diet planning.

Given how silage quality in many cases was hampered due to poor growth and weather, do you have sufficient high-quality forage available for when cows calve down come Spring 2025? If not, what’s your back-up plan?

Negative Energy Balance (NEB)

In the week post calving, cows produce more milk than their feed intake can provide for, resulting in Body Condition loss due to Negative Energy Balance (NEB). Typically, a cow reaches peak milk output 6-8 weeks post-calving but will only reach peak dry matter intake 10-12 weeks after calving. Such a cow’s diet must be energy dense enough to ensure body weight loss of less than 0.5 BCS between calving and breeding.

Dry matter intake typically increases by 0.75 – 1.0 kg/week post-calving, underlining the need for an energy-dense transition diet. This can prove difficult to control where silage quality is poor. In such a scenario, farmers must be prepared to fill the gap; otherwise, production will be compromised in the short-term, while in the longer-term, issues including poor fertility could be evident by May. Adequate concentrate supplement, depending on milk output, is paramount, with high energy grazed grass forming an essential diet component.

Monitoring NEB

• Low milk protein %: when energy is restricted in the diet – often caused by poor quality silage, delayed turnout and/or insufficient supplementation levels relative to cow output.
• Body condition loss across the herd (<25% of cows with a >0.5 unit of BCS loss in early lactation).
• A bulk tank milk fat: protein ratio > 1.4 (calculated by dividing the milk fat % by milk protein %); signals poor energy balance in the herd’s diet where compact calving occurs.

For more information, contact your local Agritech Sales Advisor here.

After a fantastic back end to the grazing season, the focus of farmers has increasingly turned towards nutrition levels from winter forage.

Hopefully for many herds, and where silage stocks are tight, the last number of weeks will have alleviated some pressure from the feed budget. However, it is still worth knowing what reserve is available for next spring.

The aim over the winter period will ultimately depend on the animal type, whereby youngstock/dry cows will be stored/maintained over the winter (target Average daily gain of 0.5-0.7 kg/hd/day youngstock). Cashflow animals will also be targeted to achieve optimum performance, be it winter milk herds or finishing cattle.

However, you cannot manage what isn’t measured, and the same applies in terms of what quality silage is available to you in the yard.

The focus of farmers has increasingly turned towards nutrition levels from winter forage.

Silage analysis results will often signal the level of fermentation that occurred which can be used to predict the stability of the pit and therefore dictate feed-out management. However, the importance of completing forage analysis hinges around allowing farmers to make informed decisions regarding feed plans dependant on stock type.

For dry cows, silage analysis will also dictate feed plans:

Replacement heifers

Weanlings/replacement heifers should be offered the national average of 67% DMD well-preserved grass silage, while underweight heifers will typically require 1.5-2kg of concentrates/head/day. This can be reduced by 1 kg/day (0.5-1 kg/head/day) if silage digestibility is 5% higher or where heifers are at or above target weight.

For example, on target heifers (grass silage quality of ~ 70% DMD) require supplementation of 0.5 – 1 kg of concentrates. Early turnout for the lightest heifers in the herd will them help gain lost ground next spring. However, this should not represent the sole contingency plan with under-target replacements.

Separate heifers should be housed and fed in separate groups according to the requirements needed to achieve their target weight at breeding. The target at housing is 40% of mature body weight and 50% in early February when turned out to grass.

For more advice, contact your local Sales Advisor here.

Prevention of metabolic issues next spring will hinge around management decisions that will be made over the next number of weeks. When costs associated with clinical cases are assessed alongside the time and labour involved in such cases, prevention is always better than cure.

BCS

It is always best practise to dry off cows at, or very close to same condition that she should calve down in (Target BCS 3.0 – 3.25). Therefore, the nutrition of the dry cow should just maintain condition over the 60-day dry period (Thin cows should be dried off early to allow for recouperation of condition).  Over-conditioned cows at calving are also problematic. Therefore, cows should be condition scored prior to dry off, which may result in grouping cows accordingly where large variation in the herd arises.

Silage quality – the decision factor

Feed plans for the dry cow will centre around what quality silage is available. High quality silage will need dilution to avoid over-conditioning or where quality is very low, some level of energy supplementation will be required. Testing dry cow silage and assessing how much silage reserve is available will paint a clear picture of what feed requirements will be. Where issues around calving occurred last spring, it is worthwhile also testing silage for mineral analysis to highlight any precursors – such as high potassium/ K%.

Dry Cow Mineral Provision

Feeding a dry cow mineral throughout the dry period is essential to build up mineral reserves and allow the cow to calve down without issue. Most Irish silages lack the required mineral levels to get the cow through the dry period, lending to the provision of a high-quality mineral supplement to avoid metabolic disease risks. High K levels in Irish silages is also a running trend, which will require a high level of soluble magnesium to help overcome the risk of milk fever. Research indicates a single case of Milk Fever is estimated to cost ~ €312; with sub-clinical cases estimated to cost a herd >€100/case.

In a high-quality dry cow mineral pack we should be looking for a high inclusion of a highly soluble source of magnesium, which should also be coupled with a complimentary inclusion of Phosphorus, a high inclusion of chelated/protected trace elements to overcome antagonists, and a strong all round vitamin pack (A, D3 & E).

For tailored dry cow mineral advice, get in touch with your local Agritech Sales Advisor here.

Silage fields that have not been grazed or that were closed up before the end of March are already at or maybe even slightly beyond optimum quality. The question is ‘do I cut or do I wait?’

To answer the ‘cut or wait’ question, the key factors of quality silage must be taken into consideration. The first and most important factor is cutting date. The second one is the weather conditions. Thirdly, the application of a quality silage additive, and finally, having ticked off all of the above boxes, the silage clamp must be covered and sealed properly.

According to Agritech’s Sales Director, John Kenny, “deferring the cutting date too far may result in additional and unnecessary expense for farmers.”

“Farmers currently have excellent quality material for harvesting and it is a huge pity to let the current fine spell of weather pass without harvesting silage and possibly end up making lower DMD silage in poorer conditions later in the month.    

“I am also concerned that when this spell of dry weather passes, there will be a surge of growth that will also draw more nitrogen up into the plant. This material when harvested, will bring its own issues with regards to fermentation and the making of a palatable feed for livestock”, says John.

With lengthy dry cow periods no longer in existence, quality silage is an essential requirement for the spring calving cow in late lactation and again when freshly calved, as it will help support early lactation body condition, milk yield and to allow the cow to return to cyclicity as quickly as possible.  

For beef cattle, a daily live-weight gain of 0.6 kg is considered the optimum for winter performance where the animals are returning to grass in the spring. Quality silage will again play a key role in achieving this growth level.

Ensiling Process – Key to quality

 “The application of a proven silage additive at ensiling is a very important part of securing as much of the quality in the winter forage as possible. It speeds up the preservation and retains more of the feed value within the pit, in addition to retaining more actual silage in the pit”, says John.

Agritech’s GrasZyme Sugarboost Forage Additive has long proven itself as an effective silage preservation aid. The unique technology used in the additive has been scientifically proven to reduce unnecessary plant breakdown and ensure reliability even in difficult low-sugar conditions.

GrasZyme Sugarboost is independently proven to deliver on key silage additive criteria, namely improved animal performance and reduced dry matter losses.

A total of 19 independent trials have been shown to deliver:

• + 1 litre of milk per cow per day and .09% milk protein increase
• + 110g daily live-weight gain in beef animals
• 6.1% reduction in dry matter losses

The reduction in dry matter losses alone will cover the cost of purchasing the silage additive, with the extra animal performance coming for free.

John concludes, “With farm margins ever reducing, it is no longer economical to use purchased concentrates to offset poorer quality silage. Farmers must now take the opportunity to make the most efficient use possible of homegrown forage and especially grazed grass and grass silage.”

Get in touch

All Agritech sales representatives and distributors are trained to assist farmers in getting the most from their silage. Assistance is available with choosing the best grass mixture, right up to the point of harvest and the use of a quality silage additive.

To find out more about, GrasZyme Sugarboost, click here

To find your local Agritech sales representative/distributor, click here

One of the biggest challenges facing Irish farmers is being able to feed stock in a way that will give the biggest return on investment. As a standalone feed, silage is expensive to produce, and when a land charge is factored in, first cut silage is now costing in the region of €300 per acre to grow and ensile. It is therefore most important that the desired level of silage quality is achieved as often as possible.

Maximising silage quality has never been more important for Co. Tipperary farmer, Albert Purcell. Albert is a beef and tillage farmer who up until recent years, placed more attention on making quantity versus quality silage. As a result, silage quality and animal performance was poor, leading to an over reliance on purchased concentrates.

With the help of Agritech’s Technical Nutritionist, Bil Ryan, Albert put a plan in place to overcome these challenges. He now gives close consideration to reseeding with good quality grass seed, careful management of the silage pit and using a good quality silage additive.

WATCH ALBERT’S STORY BELOW

Reseeding with quality grass seed  

Pastures can lose quality as they get older, and maintaining a high percentage of perennial ryegrass in the sward is crucial in order to maximise output from the forage. A grass sward containing 100% perennial ryegrass will grow up to 3t DM/ha more than a sward containing 15% perennial ryegrass and it also produces a higher feed quality, thereby increasing animal performance, i.e. milk output and daily live-weight gain.

Bil’s advice to farmers for optimum germination and a successful reseed is achieving a properly prepared seedbed. Applying appropriate nutrients will also help ensure optimum germination and adequate fuel to sustain the new reseed through the winter ahead. At index 3, applying at least 3 bags of 10.10.20, plus 1 tonne of lime is advisable.

Complementing your preparation efforts with the right grass seed mixture is key. According to Bil, “Agritech’s Tipperary Grass Seed Range has a mix for every situation. Our Tipperary Grass No.5 mixture is designed to produce up to five cuts of high quality forage as zero-grazing or three cuts of silage. Our traditional Tipperary Grass No.3 mixture is ideal for two cuts of silage, plus shoulder grazing.”

Reducing ensiling losses  

Reducing ensiling losses is extremely important for improved feed efficiency and greater animal performance. Following the pit management practices outlined below will help;

• Prepare pit well in advance of the expected harvest date; wash out pit and identify any leaks, cracks, and unsealed and eroded joints. Lay down protective layers of sheets inside the pit walls to facilitate an excellent seal at the pit edges.
• The pit should be filled evenly, with each layer of silage no more than 20cm. Each layer should be well consolidated to remove air.
• Use a vacuum sheet as the first sheet and cover by folding in the two side sheets and fitting the final top sheet. Weigh down with tyres to secure the clamp.

Maximising animal performance

Agritech’s GrasZyme SugarBoost Forage Additive has long proven itself as an effective silage preservation aid and has been developed with accelerated fermentation and animal performance as the primary focus. According to Bil, “the ultimate aim from the use of a silage additive is to enhance animal performance, deliver more milk and live-weight gain at feed out and increase farm profitability.”

Having undergone numerous trials on dairy and beef research institutes throughout Ireland and the UK, the additive has shown daily milk yield increases of 1 litre, a 0.09% increase in milk protein and 110 grams extra daily live-weight gain.

The technology used in the additive has also been scientifically proven to reduce unnecessary plant breakdown and ensure reliability even in difficult low sugar conditions. Independent trials have shown that in a 500t clamp, GrasZyme SugarBoost retains an extra 30 tonnes of silage and ensiling dry matter losses of 6.1% were also reported from these trials.

WATCH OUR SILAGE PRESERVATION VIDEO BELOW 

For more information, contact your local Agritech distributor or view our GrasZyme SugarBoost page

“With lengthy dry periods no longer in existence, quality silage is an essential requirement for the freshly calved cow as it will help support early lactation milk yield and allow the cow to return to cyclicity as quickly as possible.

“For beef cattle, a daily live-weight gain of 0.6 kg is considered the optimum for winter performance where the animals are returning to grass in the spring. Quality silage will again play a key role in achieving this growth level,” John explains.

Silage samples recently analysed show significant variations in quality, with many Irish beef farms estimating an average of just 66% dry matter digestibility (DMD). The difference between good and bad silage quality has a significant impact on animal performance. In the winter of 2012, Teagasc in conjunction with the Irish Cattle Breeding Federation (ICBF), conducted a study on weanling performance on 18 farms when housed. The results indicated a significant shortfall in live-weight performance, despite all of the farms feeding 1 – 2.5kg of silage/head/day. Only four of the 18 farms had a daily live-weight gain in excess of 0.51 kg and seven of the farms had an average daily live-weight gain of just 0.25kg.

According to John, silage of 75% DMD in quality must be a target for farms going forward. Quality silage starts with quality grass cut at the correct growth stage. Every silage field which contains a high proportion of perennial ryegrasses will have a sward of 80% DMD by the middle of May. Once grass silage fields go past this, they lose an average of 3% DMD units per week, with this loss increasing to 6% DMD units in poor weather or lodged crops.

“The application of a proven silage additive at ensiling is a very important part of securing as much of the quality in the winter forage as possible. It speeds up the preservation and retains more of the feed value within the pit, in addition to retaining more actual silage in the pit. In fact, the extra retained silage alone will cover the cost of the additive,” says John.

Our GrasZyme SugarBoost Forage Additive has long proven itself as an effective silage preservation aid and is formulated with accelerated fermentation and animal performance as the primary focus. Having undergone numerous trials on dairy and beef research institutes throughout Ireland and the UK, the additive has shown daily milk yield increases of 1 litre, a 0.09% increase in milk protein and 110g extra daily live-weight gain.

For more information, contact your local Agritech distributor