Use national feed co-ordination service
Farmers needing stock feed or wanting to supply or donate feed are being urged to use the National Feed Co-ordination Service.
High-quality silage is a stable feed made from high-quality pasture.
Pasture is preserved in the absence of oxygen by a high-quality fermentation to minimise any loss of feeding value.
It is impossible to produce high-quality silage from low-quality pasture, no matter how good the fermentation is.
Both the quality of the ensiled pasture and the quality of the fermentation must be considered.
With well-preserved silage, losses in feeding value during fermentation will be small, and the final silage will be only slightly lower in feeding value than the original pasture.
The quality of the fermentation tells us how well the quality of the original pasture has been preserved in the silage.
The lactic acid produced during fermentation causes a decrease in pH. A low pH will prevent an unwanted butyric fermentation, which reduces both the feeding value and palatability of the silage. Low DM silage needs a lower pH than high DM silage.
fLow values for ammonia-N indicate minimal breakdown of protein in the silage, usually well-preserved because pH has fallen quickly to a low level in the silage.
High concentrations of lactic acid are seen in well-preserved silage. High levels of butyric acid are found in poorly preserved silage and indicate that an unwanted butyric fermentation has occurred.
Top quality
Silage quality can best be ensured by:
- Gathering several swaths into a windrow for improved baler performance
- Producing uniform box shaped windrows that match the baler’s pick-up capacity
- Making firm, well shaped bales that are easier to enclose and store
- Bale chopping increases the density of the bales (fewer bales/ha so reducing costs)
- Chopping also reduces the air in each bale and releases sugars, both of which improve speed of fermentation.
Wrapping
Wrapping silage quality can best be ensured by:
- Wrapping promptly — within 2-4hrs of baling
- Wrapping close to the stack rather than transporting wrapped bales from the field to reduce chance of physical damage (this also prevents soil compaction in the field)
- Using six layers of wrap to improve sealing and to protect from physical damage. IGER research has identified big increases in lysteria associated with inadequate wrapping
- Using green or white wrap has been shown to reduce the temperatures of stored bales and to subsequently reduce the amount of moulding.
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