Storing silage bales – everything you need to know


Silage effluent is 200 times more polluting than untreated sewage.

Storing silage bales – everything you need to know

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  • 1 mth ago

Silage effluent is 200 times more polluting than untreated sewage.

Data released by Agrisearch indicates that during the period March to May 2020 grass growth across Northern Ireland was up to 28% lower than would normally be expected for this period.

Although this allowed many farmers to make high dry matter first-cut silage, it will have inevitably impacted on the quantity produced.

Phelim Connolly, an agri-environment adviser at the College of Agriculture, Food and Rural Enterprise (CAFRE) said: “Many farmers will now turn their attention to ensuring sufficient good quality second-cut silage is harvested to meet winter feed requirements.

“Baled silage can be an excellent way to build up silage reserves, through the removal of excess grass supplies.”

Silage effluent

“However, given the current wet weather, wilting may not always be possible leaving an increased pollution risk from bales produced.”

“So, care must be taken when choosing a suitable location to store silage bales.

Silage effluent continues to be one of the most potent sources of pollution on farms and is 200 times more polluting than untreated sewage.

On entering a waterway, it causes the oxygen to be rapidly removed from the water with devastating effects on animal and plant life.”

Regulations

The regulations regarding silage and slurry storage are contained in Nutrient Action Programme (NAP) Regulations (Northern Ireland) 2019 which is available to view on the DAERA website.

The NAP Regulations state that silage bales must be stored at least 10 metres away from a waterway and managed in such a way as to prevent seepage into a waterway.

Tips

"Where possible, grass should be wilted to at least 25 per cent dry matter before baling because this his will reduce the risk of effluent seepage.”

Connolly explained.

“Also, silage bales must be stored at least 10 metres away from any waterway and managed in such a way as to prevent seepage into a waterway.

When choosing a storage site, ensure it is level and carefully assess the potential polluting risk to a waterway, he advises.

He said that field or yard-piped drainage systems should also be considered as storing too close to these systems could allow any escaping effluent to enter a waterway directly.

"Also, if bales are stored on concrete, the effluent must be collected in the same way as effluent from a silage pit.”

“And, if you're storing on a hardcore or stone base ensure the aggregate size is not too large as open spaces within it can accelerate movement of effluent seepage and enter groundwater systems quicker.”

"In addition, if you're storing bales in a field then try to place them close to a track or lane. This will help avoid excess rutting and compaction of land during winter months when it is more likely to be saturated.

"Finally, when it comes to using baled silage, remember it must not be opened within 10 metres of a waterway - including field drains and sheughs.

Also, care should be taken to ensure that the residual effluent contained in the removed wrap does not escape to a waterway.

"And, remember to dispose of bale wrap in accordance with the waste management regulations.”

“All waste plastics used on-farm should be recycled as a preferred option. If recycling is not an available option, it should be taken to a licensed landfill site for disposal."

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