Farming

Spotlight on ammonia reduction strategies for Welsh poultry producers

Published

2 years ago

May 17, 2022

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.

Farming

Pembrokeshire Agricultural Society in search for county’s top progressive farmers

Published

2 weeks ago

April 9, 2024

Tom Sinclair

IF you farm in Pembrokeshire and can demonstrate your farm’s use of the latest technological methods to promote progressive, sustainable agriculture then the Pembrokeshire Agricultural Society encourage you to enter the prestigious Baron de Rutzen Award.

Adam Thorne, Pembrokeshire County Show President, said, “We are looking for local Pembrokeshire farmers, under the age of 45, who can demonstrate their farm’s use of the latest technological methods to promote progressive, sustainable agriculture. They also need to show consideration for the environment and habitat sensitivity on their farm as well as present an aesthetically pleasing example of farming in the county. The competition welcomes all livestock and arable sectors to take part.”

Last year’s winners of the Award were Mark and Caroline Davies of Little Newcastle, Haverfordwest. They milk 230 pedigree Holsteins through a fully automated system. They rear their own replacements and also have a small beef enterprise. The farm is all grassland and they follow a strict reseeding and liming policy to optimise the yield from their multi-cut silage system. The couple place significant emphasis on animal health, husbandry and breeding to maximise the efficiency of their system.

Baron John Fredrick De Rutzen was President of Pembrokeshire Agricultural Society in 1936 and the Baron de Rutzen Trophy was produced in his memory. The third Baron served in the Welsh Guards and tragically died, aged 36, in 1944.

This year’s entrants must be fully practising farmers within the county of Pembrokeshire and were under the age of 45 years on 1 January 2024. Entries can either be by nomination or direct application online on the Pembrokeshire Agricultural Society website. Click here to apply: Baron de Rutzen Award | Pembrokeshire County Show | Pembs Agricultural Society (pembsshow.org)

The closing date for nominations and applications is at noon on Wednesday, 29 May 2024.

Farming

Pembrokeshire Agricultural Society elect new president

Published

3 weeks ago

April 1, 2024

Tom Sinclair

ARABLE and beef farmer, Adam Thorne, has been unanimously elected to become the new President of Pembrokeshire Agricultural Society for the year ahead. Adam is the third generation of his family to hold the position.

During the Annual General Meeting of Pembrokeshire Agricultural Society, held last week on the Pembrokeshire Showground, Mr Tim John and his wife Margaret John were also voted in as Presidents elect.

Adam Thorne has had a long association with Pembrokeshire Agricultural Society. After visiting the show as a toddler, then helping show the family’s pedigree Herefords, his uncle got him into helping him with stewarding in his early teens. From there he progressed to being a Steward with his own section, Commercial Cattle, and then also the Butcher’s Lambs section.

From stewarding, Adam became involved with committee work, starting as an Executive and then on to the former Finance and General Purposes Committee. He has been Chairman of the Estates Committee for 12 years and is now a Board member and a Trustee.

Adam said, “I am proud of my long association with Pembrokeshire Agricultural Society. I am the third generation to now be President, following my late grandfather, Walter Thorne, my father, Robert Thorne and more recently my uncle, George Thorne. I am looking forward to my year in the prestigious position.”

Away from his work with the society, Adam runs the family’s arable and beef farm in Robeston West, Milford Haven. He has been heavily involved with Tiers Cross YFC from an early age, having been Club Secretary twice and Chairman. He has also sat on Pembrokeshire County YFC Committees and the Wales YFC Rural Affairs Committee.

The 2024 Pembrokeshire Agricultural Society officeholders, announced at the AGM, include Miss Ffion Edwards who was awarded the role of Ambassador at last year’s show. Ffion, a nurse from Maenclochog, has enjoyed many years of attending the county show and believes that there are so many good elements to it. Ffion has been a member of Llysyfran YFC for 15 years and enjoys every aspect of young farmers – trying new experiences, competing and travelling to name a few. Mrs Nicola Owen was also elected as the Honorary Treasurer.

Brian Jones, the outgoing Pembrokeshire Agricultural Society President, took the opportunity to thank everyone who had helped and supported him throughout his presidency. During his year as President, Brian and his wife Helen, raised a tremendous amount of money for various charities including the Pembrokeshire Agricultural Society, RABI, Tir Dewi and the DPJ Foundation. Brian also gave his assurances that Castell Howell will continue to sponsor the Food Hall for future years.

Pembrokeshire County Show, the largest county agricultural show in Wales, will be held over two days again this summer on 14 and 15 August. Everyone is invited to attend the celebration of rural life in the county.

Pictured (left to right): Ffion Edwards the Ambassador for 2024; Adam Thorne, President; Margaret and Tim John, the Presidents Elect.

Farming

£1,000 bursary award available to Pembrokeshire agricultural students

Published

1 month ago

March 14, 2024

Tom Sinclair

PEMBROKESHIRE Agricultural Society’s £1,000 Bursary Award is now open for applications from students studying agriculture, veterinary science, agricultural engineering, food technology, forestry or other subjects allied to agriculture.

The Student Bursary Award 2024 is available to students, from Pembrokeshire, who are currently studying or have been accepted to start their studies. They can apply for this financial support to assist with their chosen college or career path.

Last year’s winner of the award was Lottie Wilson from Hayscastle. Lottie was studying agriculture at the University of Nottingham when she applied for the bursary. When she is at home she is a general dairy farm worker as well as a lambing hand and a calving beef herd assistant. In 2021 she was the top agriculture student at Hartpury College.

Robert James, Chairman of the Society’s Bursary Committee said, “I would urge all Pembrokeshire students who study subjects that are clearly aligned to agriculture to apply for this bursary as it won’t only assist with your studies but will also give you great experiences such as undertaking an interview which is a key employment skill. It will also assist in your future career within the agriculture industry.”

“A panel of independent judges will draw up a short list of candidates who will be interviewed and the winning candidate will be asked to give a short presentation at a future meeting of the society’s show council.

“The standard of applications has always been exceptional which gives a lot of heart that there are a lot of very talented young people in our community. We are very much looking forward to receiving applications for this year’s bursary and hearing from the younger generation.”

Qualifying students must not have won the student bursary on a previous occasion, the applicant must be studying or has been accepted to study agriculture or allied subjects at a UK college or university at A-Level or higher and the applicant’s family home must be in Pembrokeshire.

The bursary is tax free and will be awarded to the student who, in the opinion of the panel of judges, has submitted the best dissertation on how the bursary will assist them to complete their course of study.

Further details and the entry form can be found online: Student Bursary Award | Pembrokeshire County Show | Pembs Agricultural Society (pembsshow.org) or by calling the show office: 01437 764331. The closing date for applications is noon on Monday, 1 July 2024.