Biofertilizers a Viable Alternative to Synthetic Nitrogen in Forage Production
Beneficial soil microbes applied to bermudagrass in a livestock forage production system have been found to be a viable alternative to synthetic nitrogen applications for fertilization and forage quality enhancement, based on Auburn University research.
“Nitrogen fertilizer accounts for the majority of variable-input costs associated with forage production, and can potentially negatively impact soil, water and air resources,” said associate professor and Extension specialist Leanne Dillard. “Sustainable production of livestock from both grazed and conserved forage production is critical to economic and environmental viability of the livestock industry.”
In two years of a three-year, small-plot study, funded by a SSARE Research and Education Grant, researchers found that bermudagrass applied with plant-growth promoting rhizobacteria yielded similar results to synthetic fertilizer treatments in forage dry matter yield and nutritive value. Those results suggest that plant-growth promoting rhizobacteria may be a viable option for biofertilization of fall-stockpiled bermudagrass, but the researchers stress that further investigation into the effect of beneficial soil microbe inoculants on a larger scale is needed.
Experimental treatments on 18 bermudagrass plots included a negative control, synthetic fertilizer, a single strain of plant-growth promoting rhizobacteria, a blend of three Bacillus species, and a combination of beneficial microbes plus fertilizer. Two applications of plant growth-promoting rhizobacteria were applied at the beginning of each stockpiling season in August and again 30 days later. A third of each plot was clipped in mid-November, December and January of each year to determine dry matter yield and nutritive value.
State Contacts
Alabama’s SARE State Coordinators are vital for expanding sustainable agriculture training for Extension, NRCS, and other agricultural professionals, who will then help producers transition to a more sustainable agriculture.
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SARE IN ALABAMA
The Alabama SARE program is facilitated through a joint collaboration between Auburn University, Alabama A&M University and Tuskegee University. Alabama SARE partners with researchers, extension faculty, producers, and community organizers to research and implement the best science-based practices available in all aspect's of Alabama's agricultural system.
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