Silage Header Cutting Height Settings

Silage Header Cutting Height Settings

The cutting height setting on a silage header is a critical operational parameter that directly influences the yield, quality, and nutritional value of the harvested forage. This setting determines the portion of the plant that is collected and processed, impacting both the immediate feed value and the long-term health of the crop regrowth, particularly for grasses. Finding the correct balance is key to optimizing the harvest outcome.

The primary factor influencing cutting height is the type of crop being harvested. For corn silage, the cutting height is typically set higher than for grass or cereal silages. A common practice for corn is to set the header to cut the stalk at a height of 15 to 40 centimeters above the ground. This higher cut leaves the lower, lignin-rich and often nutrient-poor section of the stalk in the field. Since lignin is indigestible for ruminants, excluding this portion improves the overall digestibility and energy content of the silage. Furthermore, the lower part of the corn stalk is more likely to be contaminated with soil-borne bacteria and fungi, which can hinder the fermentation process in the silo. Leaving this portion in the field thus contributes to a cleaner harvest and better silage quality.

For grass and legume silages, the cutting height is managed with a focus on plant regrowth and future yield. Cutting too low can damage the crown of the plant, slow down regrowth, and introduce soil contamination. A cutting height of 5 to 10 centimeters is often recommended for these crops. This height preserves the growing point and leaves enough residual plant material to support rapid regrowth for the next cut. It also helps to minimize the intake of soil, which can contain clostridia bacteria. These bacteria can lead to poor fermentation and the production of butyric acid in the silage, which lowers its feed quality and palatability.

Field conditions also play a significant role in determining the appropriate cutting height. In uneven or rolling terrain, a slightly higher setting may be necessary to avoid scalping the ground and scooping up soil and rocks. Similarly, if the crop is lodged or leaning, adjustments may be needed to capture as much of the viable material as possible while still avoiding excessive soil contact. It is important for operators to inspect the stubble behind the harvester periodically to ensure the header is maintaining the desired height consistently across the entire working width.

Modern silage headers often feature hydraulic or electronic control systems that allow the operator to adjust the cutting height from the tractor or harvester cab. This allows for real-time adjustments as conditions change in different parts of the field. Consistently maintaining the correct cutting height is a simple yet effective management practice that has a direct impact on the quantity and quality of silage produced, as well as the sustainability of the forage production system.

Shijiazhuang Tianren Agricultural Machinery Equipment Co., Ltd. provides headers that offer precise and reliable control over cutting height, supporting farmers in their efforts to produce high-quality forage efficiently.