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

Value of hedges in storing carbon below ground studied in soil project

Published

1 week ago

November 29, 2023

Tom Sinclair

THE ROLE hedges play in capturing carbon and storing it in soils is being investigated as Farming Connect gathers soil samples from across Wales in an initiative that will provide important benchmarking data for farmers.

Data collection for the second year of the Welsh Soil Project is underway, and this time soil samples have also been taken from land within a metre from field hedges, in addition to within-field samples.

Dr Non Williams, Farming Connect’s Carbon Specialist Officer, said the aim is to compare soil carbon stocks within fields and under woody vegetation.

“We often get questions from farmers about this, and we hope that the results of this project will provide them with the answers,’’ she said.

“Estimating the soil carbon levels by hedges will help to highlight their importance for climate change mitigation.’’

Farmers have a key role to play in tackling climate change and soils can play an important part in that.

The Welsh Soil Project samples are being analysed ahead of Wales Climate Week in December.

Over 1,000 samples were taken from farms that are a part of Farming Connect’s Our Farms Network, which were then analysed for organic matter content and bulk density, as well as other measurements.

For uniformity, all samples were collected within the same period this autumn and from grass fields including permanent pasture, hay and silage fields, and reseeds.

“This project looks at how varying management intensities, along with geographical factors, are impacting soil carbon stocks across Wales.”

Soil was taken from multiple depths, from the top 10cm layer to a depth of 50cm.

Dr Williams, who is leading the project, is a speaker at a major soil science event in Belfast in December.

At the British Society of Soil Science and the Soil Science Society of Ireland Annual Conference, she will deliver a presentation on the preliminary results of the project.

Soil carbon and carbon in general are also themes at three Farming Connect Masterclasses taking place in February 2024.

Dr Williams, who will lead these workshops, said it will give farmers an opportunity to improve their understanding of the basics of carbon footprinting prior to carrying out a carbon audit for their farms.

“These interactive workshops will focus on breaking down the carbon jargon, allow farmers to learn about the significance of the carbon cycle to their farm, and how it can be influenced to help reduce the farm’s carbon footprint in the future,’’ she said.

The events will take place at Llety Cynin, St Clears, Carmarthenshire, on 6 February, at Elephant and Castle, Newtown, on 8 February, and at Nanhoron Arms Hotel, Nefyn on 20 February, all from 7.30pm to 9pm.

Further details on how to book a place can be found on the Farming Connect website.

Farming

Time to ‘protect Welsh farming from the Welsh Government’ – Gwlad Gwlad

Published

1 week ago

November 28, 2023

Tom Sinclair

GWYN WIGLEY EVANS, leader of Gwlad Gwlad, the Welsh Independence Party that believes in a working economy (www.gwlad.org) has spoken out on the threat not just to Welsh farming but the lives of Welsh farmers posed by the Welsh Government’s new Habitat Wales scheme.

Gwyn Wigley Evans explained the impact of the scheme: “The Welsh Government’s new scheme will reduce farmers to badly paid environmental managers. It is equivalent to planting trees on rugby pitches and still expecting games of rugby. The former farmers will see incomes fall by 50 to 90%. Each family farm supports 7 businesses within 20 miles. They can all expect massive reductions.”

Gwyn Evans has direct engagement with the social impact of difficulties in rural communities. He has been a Samaritan and CRUSE (Bereavement Counselling) counsellor for 23 years. Addressing his remarks to Lesley Griffiths, the Welsh Government Rural Affairs Minister, he pointed out “This policy will leave blood on the Welsh Government’s hands. The Samaritans, DPJ, Tir Dewi are going to be busy. This policy will pull the trigger on the guns. The effects of the Habitat Wales scheme will clear the environment of people as deliberately as the Highland Clearances.”

When addressing actions to follow he said “Plaid Cymru is no use to Welsh Farmers. They support Mark Drakeford’s Rural Affairs policies meeting the goals of London Labour environmentalists not Welsh Farmers. Gwlad Gwlad will hold a meeting at the Royal Welsh Winter Fair in Builth Wells on 27 November 2023 to focus on how to resist the worst impacts of the Habitat Wales scheme.Exports of Food and Drink were worth £797m to the Welsh economy in 2022 and are growing faster than the UK as a whole.

The world is full of small countries which have powered ahead, economically and socially, since achieving their independence. Gwlad Gwlad believes that Wales should be one of them: a prosperous, successful independent country enjoying good relations with its neighbours and comfortable in its own skin.

Farming

Leader of Welsh Lib Dems visits Carmarthenshire farm to highlight farmers concerns

Published

2 weeks ago

November 20, 2023

Tom Sinclair

LAST WEEK (Nov 16) the leader of the Welsh Liberal Democrats Jane Dodds MS visited Blaencennan farm in Llangadog to highlight issues affecting common land farmers in Wales.

During the visit, the following issues were raised:

-Concerns around the Habitat Wales Scheme.

-The importance of Welsh communities and the Welsh language and how the farming industry ties into that.

-The willingness of farmers to diversify their businesses.

-Commonland farming being included in the Universal payments in the Sustainable Farming Scheme.

-Ensuring that land is being farmed and not just being left, with non-grazed dry land presenting a potential fire risk.

Mrs Dodds also welcomed on the visit the Rural Affairs Minister for Wales Lesley Griffiths MS, as well as representatives from the National Farmers Union.

Commenting, Jane Dodds MS said: “It was a pleasure to visit Blaencennan farm today alongside the Minister Lesley Griffiths MS and representatives from the National Farmers Union.

Many farmers across Wales are being faced with an uncertain future and they desperately need our support.

My hope from this visit is that the concerns of the farming community are listened to and acted upon.

The Habitat Wales scheme is laden with pitfalls caused by incorrect mapping of farmland areas and a considerable low compensation offer to farmers that will leave them worse off.

If we are going to be serious about the creation of a sustainable farming model, then it is vital that we fix these errors before the scheme is launched.

It is clear to see that farmers want to do the right thing by helping the environment and by working together we can bring a brighter and greener future for Wales.”