Baculis, Jessica D.. Evaluating different switchgrass cultivars and compost treatments for biofuel production of switchgrass (Panicum virgatum L.). Retrieved from https://doi.org/doi:10.7282/T3GM85B7
DescriptionSwitchgrass (Panicum virgatum L.) is a native perennial grass crop currently being evaluated as a bioenergy crop for farmers. There are many obstacles to successful switchgrass crop production. Selecting the cultivar most adapted for a particular region can be crucial in maximizing crop production. The uniformity of germination can also affect crop establishment and dry matter yields. Finally, the application of a locally available, low-cost and efficient nutrient source has a major impact on the economic feasibility of this crop as a bioenergy source on farms. Trials conducted in Middlesex County, New Jersey evaluated the performance of five different switchgrass cultivars and four different locally available compost treatments. A growth chamber study evaluated the germination of different aged seed from two cultivars of switchgrass at temperature settings set to simulate seeding dates in May, June and July in Middlesex County, New Jersey. Plots were evaluated for seedling emergence, stand survival, stand quality, heading and anthesis dates, plant height, lodging, dry matter yield and dry matter content in the first two years after establishment. Growth chamber trials compared germination rate and percent germination between cultivars and compost amendments. In the trial comparing different switchgrass cultivars ‘Carthage’, ‘Kanlow’ and ‘High Tide’ had significantly greater yields the second harvest year compared to the first harvest year. Since no additional fertilizer was applied after the initial planting year this indicated an increase in stand quality over time. In the trial comparing different compost amendments and application methods; the horse manure & sawdust, horse manure & food waste and acai berry compost had greater seedling emergence than the synthetic fertilizer control. In this trial, as well, there was a significant increase in stand quality from the first year to the second. The growth chamber trial results indicated that temperature does not have a significant effect on overall germination; however higher temperatures; representing later planting dates, have a quicker germination rate. Results also indicated that the quality of the seed lot is more indicative of germination than the actual age of the seed.