One of the main challenges of spring silage is lower dry matter (DM) content at harvest. Frequent rainfall and limited field drying windows often result in forages being ensiled below recommended DM targets. Low-DM silage favors undesirable microbial activity, particularly clostridial fermentation, leading to butyric acid production and increased DM losses. Butyric fermentation is associated with excessive protein degradation, reduced palatability, and lower animal performance. Research consistently shows that wetter silages are at greater risk when oxygen exposure is prolonged during the early ensiling phase.

Cold spring temperatures further compound these risks. Lactic acid bacteria (LAB), which drive desirable fermentation, are temperature-sensitive. Cool conditions slow their growth and acid production, delaying the pH drop needed to stabilize the ensiled forage. At the same time, many spoilage organisms remain active longer when pH decline is delayed, extending the “fermentation lag phase” and increasing nutrient losses through respiration and microbial activity.

Because spring silage is often harvested wet and ferments slowly, efficient oxygen exclusion becomes the primary line of defense. Packing silage tightly to maximize density and covering the silo as soon as possible are critical steps to remove oxygen quickly and limit losses. These practices should not stand alone but rather be combined with a high-performance oxygen barrier system.

This is where Passion Yellow and Passion Combo play a decisive role. When used in association with tight packing and rapid sealing, Passion Ag’s oxygen barriers help rapidly establish and maintain anaerobic conditions, even under challenging spring conditions and shorter ensiling periods. By limiting oxygen penetration, oxygen barrier films reduce dry matter losses, preserve fermentable carbohydrates, and support faster LAB dominance, even when moisture levels are high and temperatures are less than ideal.

While spring weather may work against silage fermentation, oxygen is one factor that can be controlled. Combining sound management practices with Passion Ag’s silage solutions is a powerful strategy to counter the odds and consistently produce high-quality spring silage despite challenging conditions.

Control what you can. Exclude oxygen early. Protect spring silage with Passion Ag’s high-performance oxygen barrier systems.

About the Author:

Felipe Xavier Amaro, Ph.D., PAS, 

Felipe is an expert in animal and crop nutrition, with a strong focus on innovation, sustainability, and on-farm profitability.

Based in Gainesville, Florida, Felipe leads Global Technical Support and Research & Development at PASSION AG.With a deep understanding of the science behind nutrition and a practical approach to farm performance, he plays a key role in driving product development and supporting customers worldwide. 

Felipe holds a Ph.D. from the University of Florida and is a certified Professional Animal Scientist (PAS), reflecting his dedication to scientific excellence and real-world results.