Mısır Silajı Nasıl Yapılır? Nelere Dikkat Edilmesi Gerekir?
One of the most important factors affecting feed costs and farm efficiency in livestock enterprises is the production of high-quality forage. Due to its high energy content, good fermentation potential, and ease of use in the ration, corn silage is one of the important forage sources widely used in cattle breeding.
However, obtaining high-quality silage is not limited to simply harvesting and storing the corn. Harvest time, dry matter content, chop length, packing quality, and silo management directly affect the nutritional value and fermentation success of the silage.
At İntegro, we have compiled the key points to consider in high-quality corn silage production for you.
What is Corn Silage?
Silage is a method of preserving high-moisture forage crops for a long time by subjecting them to controlled fermentation in an anaerobic (oxygen-free) environment. During this process, lactic acid bacteria help preserve the feed material by lowering the ambient pH.
Corn silage is a forage obtained by harvesting the corn plant along with its cobs at the appropriate stage, chopping it, and fermenting it under anaerobic conditions. The corn plant's;
High energy content,
Optimal starch level,
Ensiling capability makes corn silage an essential feed source, especially in dairy and beef cattle rations.
Why is Corn Silage Important in Cattle Feeding?
When properly planned in the ration, corn silage:
Contributes to meeting the energy requirement,
Acts as an effective fiber source to a certain extent in the ration,
Can support feed intake,
Allows for consistent forage use throughout the year,
Can help manage ration costs.
It is one of the crucial components of energy-dense rations, particularly in dairy cattle enterprises.
However, the nutritional value of the silage can vary depending on many factors such as hybrid selection, harvest time, dry matter content, fermentation quality, and storage conditions.
The Ideal Harvest Time for Quality Silage
In corn silage, the correct harvest time is critical for fermentation success and nutritional value. Harvesting at the wrong stage complicates the process. While silage harvested too early shows excessive moisture, nutrient effluent (leaching), and low starch levels, a late harvest makes packing difficult, lowers fermentation quality, and can reduce kernel digestibility.
How is the Harvest Time Determined?
When determining the right harvest time for silage making, it is generally monitored using data such as the plant's dry matter content, kernel maturity, and milk line level. In most cases, the appropriate dry matter content for corn silage is between approximately 32% and 38%. The progression of the milk line in the kernels to about half or two-thirds is considered one of the suitable periods for harvest.
The Importance of Chop Length and Kernel Processing / Packing
The chop length in harvested corn silage affects the silo packing quality and the animal's feed utilization.
Materials chopped too long: When chopped too long, materials can cause inadequate packing, air pockets, and mold growth. Conversely, a short chop length can reduce the amount of physically effective fiber.
Therefore, the chop length must be adjusted appropriately depending on the dry matter ratio, the equipment used, and the ration structure.
Kernel Processing Systems
Kernel processor systems used in modern forage harvesters ensure the shattering of corn kernels, helping to increase starch digestibility. In the case of inadequate kernel processing, starch losses may increase, and feed conversion can be negatively affected.
The Importance of Packing and Oxygen Management in Silage Making
The fundamental rule in silage making is to reduce the oxygen level inside the silo to zero. When inadequate packing is performed, yeast and mold growth accelerates, heating begins in the silage, and severe nutrient losses along with the risk of spoilage emerge. For this reason, the silage material should be spread in thin layers and compacted to the maximum level by applying full weight with the help of tractors or heavy machinery.
How to Properly Cover the Silage Bunker?
As soon as the silo filling process is completed, the surface's contact with air must be cut off immediately. Under Turkey's climate conditions, covering selection is critical, especially considering UV rays and sudden rainfall in summer months. In an ideal covering process, the following triple system should be used together:
A thin vacuum film (oxygen barrier) in direct contact with the silage
A UV-resistant, high-strength thick top cover
Surface weighting materials (sandbags, blocks, etc.)
The main goal here is to completely block air entry, ensuring lactic acid fermentation remains stable, and to prevent local spoilage that may arise from air pockets on the surface.
The Fermentation Process and the Role of Silage Inoculants (Additives)
The success of a silage fermentation directly depends on the plant's dry matter content, sugar content, natural bacterial population, and hygiene conditions. However, ideal conditions cannot always be met. This is where silage inoculants (silage additives) step in, safely guiding the process. With the proper and technological use of silage additives:
Fermentation stability is increased,
Nutrient losses due to effluent and gas emissions are minimized,
Aerobic stability (resistance to air) is improved,
The risk of secondary heating after the silo is opened is reduced.
It should not be forgotten that no feed additive alone can compensate for poor harvest and inadequate packing. Good farm management and the right product combination are essential for successful forage production.
The Devastating Effects of Spoiled and Moldy Silage on Animal Health
Poorly fermented or moldy silage leads to serious economic losses and herd health problems in enterprises. In particular, the development of mycotoxins (mold toxins) in silage triggers the following issues:
A sudden drop in dry matter (feed) intake
Disruption in rumen functions and acidosis
Severe losses in milk and reproductive yields
Suppression of the immune system
Prolonged consumption of high-risk spoiled feed also directly increases the risk of hoof diseases and lameness. For this reason, breeders must monitor the silage daily for bad odors, visible mold spots, excessive heating, and color changes.
Silage Opening and Daily Feed-Out Management
Once the silage bunker is opened, the material comes into contact with oxygen again, and the aerobic spoilage process begins. Especially during the hot summer months in our country, feed-out management becomes vitally important.
The silo face must always be cut cleanly, and the surface area exposed to air should not be increased.
A sufficient amount of progression (at least 15-30 cm) must be achieved daily from the silo, depending on the air temperature.
Prolonged exposure of the open face and the removed silage to air must be prevented; silage distributed to the feed bunks must be kept fresh.