Summary of Findings
- Pioneer® Nutrivail® feed technology 11CFT increased the yield of rumen microbial biomass during fermentation of corn silage hybrids harvested with a Shredlage® processor.
- Samples treated with Pioneer Nutrivail feed technology 11CFT samples had more acetate, less lactate and higher pH than the control silages as is typical for a L. buchneri-driven fermentation.
Trial Design
Whole plant corn forage from three genetically different hybrids (coded as 811, 813 and 815) was harvested at three commercial dairies (Elkton, SD; Worthington, MN; Dryden, NY) with a chopper equipped with a Shredlage processor. Each location targeted whole plant dry matter of 33-37%. Twenty pounds of forage was acquired and separated into two 10-lb samples. Each 10-lb sample was placed into a 13-gallon plastic garbage bag. The control treatment was prepared and ensiled before the container with Pioneer Nutrivail feed technology 11CFT was opened to eliminate cross-contamination of treatments. The control forage was mixed by shaking the forage in a partially inflated garbage bag for a minimum of one minute; then 2 lbs of forage was weighed into each of the four vacuum bags. These control bags were vacuum-sealed. The container with Pioneer Nutrivail feed technology 11CFT container then was opened and the inoculant was diluted with water.
The solution containing Pioneer Nutrivail feed technology 11CFT was added to the second garbage bag of forage and the combination was mixed thoroughly by shaking the inoculated forage in the garbage bag. Once mixed, 2 lbs of the 11CFT-treated Shredlage corn forage was weighed into each of four vacuum bags and bags were sealed.
Treatment packets were shipped to the Pioneer Livestock Nutrition Center and stored at room temperature for 90 days. Packets were opened and analyzed by Pioneer research microbiologists to confirm that 11CFT organisms were present in the 11CFT-treatment samples and were not present on the control samples. Samples were oven-dried (< 50°C) and assayed for nutrient content and VFA at Dairyland Laboratories (Arcadia, WI) and by Fermentrics® at RFS Laboratory (Ottawa, Canada). Figures presented are “within hybrid” comparisons as a conservative statistical test of the response of Shredlage silage to inoculation with Pioneer Nutrivail feed technology 11CFT.
Results
Consistent with the activity of the proprietary L. buchneri strain found in Pioneer Nutrivail feed technology 11CFT, Figures 1-3 show that 11CFT samples consistently had more acetate, less lactate and a higher pH than the control silages. This is typical of fermentation with L. buchneri that results in production of acetate and other products that inhibit yeast growth and extend the bunklife of silage. Greater conservation of sugars (P<0.10) in the 11CFT treatment also is indicative of an efficient fermentation and prevention of growth of spoilage organisms.
Figure 1. Acetate in control and 11CFT-treated hybrids harvested with a Shredlage processor
