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Farming

Spotlight on ammonia reduction strategies for Welsh poultry producers

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A WELSH study has refocused attention on strategies for reducing ammonia emissions in the poultry sector, with farmers urged to adopt measures including good ventilation and litter and manure management protocols to lower levels.

A three-year European Innovation Partnership (EIP) Wales trial on two broiler farms looked specifically at the role additives may have in reducing emissions by improving gut health and flock performance.

The study produced no evidence that these were effective for this purpose – similar levels of ammonia were recorded in the control and treatment houses.

But project manager Jason Gittins, technical director for livestock at ADAS, says there are a number of other measures that farmers can put in place to tackle emissions.

Ammonia is a component of urea, which is excreted in poultry faeces; when that manure is exposed to air and to moisture, the gas is released.

Agriculture is a major source of ammonia, accounting for 87% of UK emissions in 2019; of this, 14% came from poultry production.

“Ammonia gas is a harmful gas to both poultry and poultry workers and excessive nitrogen deposition resulting from ammonia emissions also damages the environment,’’ warns Mr Gittins.

Here, he gives his advice on how poultry farmers can reduce those emissions.

Ventilation

Poorly ventilated sheds will result in wet litter, which allows more ammonia to be released into the air. The use of effective ventilation to optimise the in-house environment, and preventing condensation can increase litter dry matter content and so reduce ammonia emissions.

Indirect heating systems heat the shed without the additional carbon dioxide and water vapour produced by direct gas heating systems, Mr Gittins explains.

“As a result, litter condition is often drier, which makes conditions less favourable for the production of ammonia,’’ he points out.

Ammonia scrubbing systems

These systems typically pass exhaust air from the house through a liquid to capture the ammonia; the air released to the atmosphere then has a lower ammonia content. Mr Gittins says reports have indicated that reductions in ammonia emissions of around 80% are possible using scrubbing systems, but the capital and operating costs are high.

Correct diet formulation

Diets should be formulated based on amino acid requirements, rather than crude protein, Mr Gittins advises.

“Diet formulation should change throughout the flock cycle to ensure that the nutrient supply is closely matched to the birds’ ammonia acid and other nutrient requirements.’’

Improvements in feed utilisation and feed conversion ratio (FCR) provide both environmental and financial benefits.

Correct removal and storage of soiled bedding

Manures should be contained in covered stores on impermeable surfaces. If field heaps are used, the surface area should be as small as possible: ‘A’ shaped, as this will reduce emissions, says Mr Gittins.

“A key issue is that wet poultry manure and litter can lead to higher emissions of ammonia and so the priority is to keep them as dry as possible, both during housing and afterwards.

“This can also increase its value per tonne as a fertiliser and reduce haulage costs and odour risks.’’

Manure applications should follow normal good practice, he adds.

“This should include avoiding spreading during frost, snow and heavy rain and taking account of soil conditions at the time.

“For liquid organic manures, precision spreading methods are preferable to splash-plate systems.’’

In free-range egg production, the move to multi-tier systems, rather than single-tier, is consistent with reducing ammonia, because of belt clean-out and frequent manure removal.

Preventing puddling around drinkers

Keeping litter dry is key to reducing ammonia levels. Drinkers should be managed to prevent spillages – any leaks need to be identified and quickly resolved.

“Nipple drinker systems should be adopted, as these allow better management of water intake and reduce water wastage,’’ Mr Gittins recommends.

High bird health

Keeping the health status of birds high will help to maintain litter in a drier condition.

“Birds challenged with disease and in poor health often produce wetter manure, which can result in higher ammonia emissions,’’ says Mr Gittins.

EIP Wales, which is delivered by Menter a Busnes, has received funding through the Welsh Government Rural Communities – Rural Development Programme 2014-2020, which is funded by the European Agricultural Fund for Rural Development and the Welsh Government.

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Farming

Transition milk trial targets calf health at Pembrokeshire dairy farm

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A PEMBROKESHIRE spring-calving dairy farm is introducing a new feeding system for newborn calves in what is to be thought the first trial of its kind in a large-scale herd.

Will and Alex Prichard are feeding enriched pasteurised transition milk to calves in their first 10 days of life rather than abruptly transitioning them to whole milk or milk powder.

Research has shown that feeding transition milk to young calves vastly improves their digestive system’s ability to digest milk, with those benefits sustained to keep them healthy and thriving as they grow.

The Prichard’s, who produces milk from 500 spring calvers, were keen to trial this feeding system in their own herd at Escalwen, Letterston, in the hope of improving calf health and wellbeing.

They are doing this with support from the Farming Connect Try Out Fund, an initiative that funds individuals and groups of farmers and growers to experiment with ideas and bring them to life.

Although the health benefits from enriched pasteurised transition milk have previously been demonstrated in all-year round calving herds in the USA and Canada, it is believed to be the first time it has been trialled in a large-scale block calving herd.

Getting the correct nutrition is crucial in the early stages of a calf’s life.

Even after a few hours the animal loses its ability to absorb antibodies – there is a dramatic reduction within 10 hours of birth and, by 20 hours, that capacity has all but gone.

To establish the effectiveness of the transition milk product, calves born at Escalwen this spring are being blood tested for antibody levels.

The transition milk is also being tested for its immunoglobulin (IgG) status before and after it has been pasteurised.

If it needs enriching this is being done to raise the BRIX value to a minimum of 12.5%. It is then fed to calves during their first 10 days of life.

An optical refractometer is being used to measure milk BRIX as it gives an instant result but by the end of the study all batches of transition milk will have been tested for IgG using Radial Immunodiffusion Assay at the University of Edinburgh.

Vet Dr Ryan Davies, director of Veterinary Technical Consulting Ltd, who is providing expert input into the project, says this will enable the accuracy of milk BRIX to be determined to quantify IgG status.

“We will then assess this against the health status of the calves,’’ he says.

Mortality from neonatal calf diseases such as diarrhoea, pneumonia and navel and joint ill is being monitored and antibiotic use too, as well as daily liveweight gains – at birth, at 30-35 days and at weaning.

The Try Out project hopes to understand more about how dairy farmers with large block calving herds can consistently produce animals that are healthy, productive and have a good quality of life through optimising calf health with preventative healthcare.

More productive animals mean less carbon emissions, higher standards of animal welfare and a reduction in antibiotic usage.

Not only do Will and Alex hope to reap the benefits in their own system but that other farmers will too when the findings are shared with the industry at the end of the project.

“Having the ability to acquire extra resources at the busiest time of our year has allowed us to monitor the results of our actions in a more scientific fashion,’’ says Will.

“Funding large scale testing is telling us so much about what is happening in our own herd environment and most importantly what behaviours and protocols are driving tangible improvements in herd health and antibiotic reduction.”

They had already made big gains in improving calf health before this project got underway.

The five-year average for morbidity in their pre-weaned calves from 2018-2022 was 45%, in line with the national average of 47% – in 2023 it was reduced to 17%.

Use of the Highest Priority Critically Important Antibiotics was reduced from 1.98mg/ population corrected unit (PCU) in 2022 to zero the following year.

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Farming

Animal health and welfare workshops help family farm shape future business

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AN eagerness to learn new skills and knowledge is helping mother and son Dianna and Iestyn Spary to continually improve their livestock farming enterprise and build a financially sustainable business fit for the future.

Technical expertise and good business sense are not qualities the Sparys lack since embarking on an impressive number of Farming Connect workshops, covering a range of animal health and welfare topics.

“It’s been an amazing opportunity, we have learned so much that we can apply within the day to day running of our farm and herd, and we can draw on that knowledge as we look at developing new enterprises and diversifications,’’ says Dianna.

She is the fifth generation of her family to farm at Goytre Farm at New Church West, Chepstow, Iestyn the sixth.

Together they farm 110 hectares, running a Hereford-cross beef suckler herd and also rearing beef cattle purchased as baby calves, including more recently British Blues, taking these through to slaughter.

Although they have been immersed in agriculture all their lives, they recognise that it is an industry that is constantly changing as new research and ideas are rolled out and applied.

This is where the Farming Connect workshops have been so incredibly valuable, says Dianna.

“You are never too old to learn, things are changing all the time. If we hadn’t got involved in attending the workshops, we would never have known about some of those new ways of doing things.’’

From learning how to maximise suckler cow productivity and protecting youngstock health to understanding diseases such as Johne’s and bovine TB, the animal health and welfare training workshops have been “enormously valuable’’, she adds.

The pair have tapped into Farming Connect accredited training courses covering areas such as calf management, health and housing, body condition scoring and safe use of veterinary medicines.

“You name it we have done it,’’ says Dianna.

They were announced the winners of the 2023 Farming Connect Animal Health and Welfare Award at the Lantra Cymru Awards in January.

The knowledge gained through Farming Connect workshops and training has helped inform changes in the business.

“We now monitor cattle weights more closely and have introduced different ways of feeding,’’ Dianna explains.

“We have also been revamping all the cattle sheds and have a couple of new ones that will be going up.

“We’ve also invested in calf jackets and if there are any drops in weights, we are more responsive with feed intakes, little things like that.’’

Iestyn has also benefited from a number of sheep-related topics offered through the animal health workshops.

Through the Farming Connect Advisory Service, they have received specialist veterinary advice on their Herd Health Plan with a focus on incoming stock and biosecurity. They have also had guidance on soil health through the soil clinic.

The Sparys largely use traditional farming methods at Goytre Farm where they have several hay meadows.

All feed is produced on-farm. “By doing everything in-house we know exactly what we are feeding and that’s important to us,’’ says Dianna.

That distinctiveness, which sets them apart from some of the more mainstream farming systems, has given them the confidence to consider establishing a diversification into meat box sales, what Dianna describes as a ‘farm to fork’ approach.

Working with a local butcher who has an abattoir licence, they hope to do everything on-site, from slaughter through to hanging the carcass for 28 days, and then selling cuts direct to the consumer.

“We have also spoken to a chef who is going to produce some recipe cards for us to include in the boxes along with a bit of history of where the meat has come from,’’ says Dianna.

Another future project could be converting stone barns in the farmyard to holiday accommodation.

To help focus their minds on their plans, the Sparys will get guidance at a Farming Connect diversification surgery; they have also signed up for a ‘planning a diversification’ training course and will attend a ‘Dos and Don’ts of Diversification’ event in the coming weeks.

For Iestyn, another form of diversification, into agricultural contracting, has provided a secondary income stream.

His customer base is largely farms with smaller acreages with crops that require harvesting or spraying.

Farming Connect has helped with this process too as Iestyn has gained his Level 2 Award in the Safe Use of Pesticides (PA1) and Safe Application of Pesticides Using Vehicle mounted Boom Sprayer Equipment (PA2).

He also offers field maintenance and fencing and works on a neighbouring farm during the lambing season.

This is where Farming Connect has again helped; through the animal health workshops, he has covered modules advising on the prevention of lambing losses and lameness, improving lamb performance post-weaning and parasite controls.

Dianna says the opportunities available through Farming Connect have really helped to drive the family farming business forward.

“We have a good relationship with our local Farming Connect development officer Lisa Powell, she has been brilliant in giving us advice on which courses and workshops are right for us and signing us up for those,’’ she says.

All your achievements, training and knowledge transfer activities are saved within your personal, online Storfa Sgiliau account, the unique, online professional development tool, available for you to view and download at any time from your BOSS (Business Online Support Service) account.

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Farming

E-Tickets now on sale for Pembrokeshire County Show 2024

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E-TICKETS are now on sale for this summer’s Pembrokeshire County Show, the largest county agricultural show in Wales. Preparations are coming together well for what is set to be a fantastic two days of livestock, competitions, attractions and much more.

General entry tickets for the show, taking place on Wednesday and Thursday, 14 & 15 August, are now available at an ‘early birds’ rate online from the website. Ticket prices have had to increase slightly to cover costs but still remain below 2019 charges. The early bird rate for Adults is £15, children £8 (5-16 years), Carers as well as children four years and under are free. Please visit: www.pembsshow.org to purchase your e-tickets.

Adam Thorne, President of Pembrokeshire Agricultural Society said, “At the event in August visitors will be able to tickle their tastebuds in the Castell Howell Food Hall, marvel at the livestock classes, enjoy watching the dog agility, be wowed by the showjumping, explore the horticulture, arts and crafts entries.

Shop ‘til they drop in the Country Market area, which will showcase over 40 quality local and award winning product and craft stalls and much more.”

Pembrokeshire Agricultural Society Membership packages are also available and these include admission to the Show and the Members’ Area. Purchasing membership of the society will support its aim to promote, advance and improve agriculture, horticulture and rural crafts and skills by the improvement of livestock and the demonstration and showing of livestock, machinery, crafts, products, methods and processes connected with agriculture and agricultural education in particular by the holding of an annual show. Full details are available on the website: Become A Member | Pembrokeshire County Show | Pembs Agricultural Society (pembsshow.org)

Putting together this event is hard work and requires an enormous effort by the staff, volunteers and trustees of Pembrokeshire Agricultural Society. The Society is indebted to so many for their commitment and support in helping host the event.

A special mention must go to the county show sponsors. Pembrokeshire Agricultural Society is proud to have many local, regular, sponsors who make the event possible.

Sponsorship Director, Richard Cole, said, “Sponsorship and Pembrokeshire County Show have been a successful combination for the last 45 years. Sponsors have enjoyed promoting their businesses through the varied mediums of banners, announcements, show rings, buildings, equine and livestock classes and championships over the years. It isn’t too late. If you’d like to discuss becoming a corporate sponsor please complete the form on our website: www.pembsshow.org.”

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