Silage management - tips for successful grass silage
High-quality staple food is the basis for successful and cost effective milk production. The right time of the first cut is particularly crucial. A delayed cut leads to nutrient losses and thus to poorer quality silage. The feed intake decreases and the milk yield drops. SCHAUMANN gives tips for optimal silage management.
Cutting time and height
Depending on the type of grass used, stands are ready for cutting approx. 30-45 days after the corrected grassland temperature of 200 degrees has been reached. The height of growth also provides information about the cutting maturity: 25-40 cm is considered cut ripe. There should be at least 20-25 days weeks between the first and second cuts. Experience from previous years has shown that especially the second cut is often harvested too late. The crude fibre contents of the crop were then often above the upper limit of 240 g of crude fibre/kg of dry matter (see Fig. 1).
A cutting height of at least 8 cm is optimal. The lower yield, which is associated with the high device setting, is compensated by significantly cleaner silages. Follow-up devices (such as reversers) can then also work without soiling. The mown grass dries better and is better absorbed.
TIP: Turn the swath once after mowing. If individual blades are brown on the cutting edge, you should correct the cutting height.
Wilting and field retention time
As short as possible wilting to 28-35% TM allows for optimal ensiling. Too wet silages lead to butyric acid fermentation.Too dry silages can be difficult to compact and lead to spoilage. Above 45-50% TM, proper compaction is no longer possible. The field retention time should be less than 24 hours to avoid energy losses.
The optimal chop length is 20-40 mm. It is a prerequisite for exact compaction, better silo utilisation and lower losses. Generally speaking, the more fibre-rich and dry the silage, the shorter the chop length.
In addition to the basic rules for ensiling, the BONSILAGE silage additives with their different directions of action support the fermentation process (see Figures 2 and 3).The selection of the correct silage additive is of great importance for the silage to be harvested. Figure 4 shows the five steps to consider when choosing the appropriate BONSILAGE silage additive.
Compaction and coverage
The entry of oxygen leads to reheating and thus to energy and TM losses. The better the silage is compacted, the less oxygen can penetrate during the extraction.
Measures for optimal compaction:
- Max. 15-20 cm layer thickness after unloading
- Tyre pressure at least 2 bar
- No twin tyres
- Max. 3-4 km/h rolling speed
- Rolling from the beginning
Immediately after completing the re-rolling, the silo must be covered correctly: Underlay film (strength: 40-50 μ), gas-tight main foil (strength: 150-250 μ), silo protection grille for weighting and protection against damage, silosacks as weighting and airtight barrier, side wall foil on side walls.
TIP: In addition to the strength of the silage film, gas density, elasticity, UV and acid resistance are important quality features.
The sampling technique should damage the gate area as little as possible to minimise air entry.