State research looks at cup plant as potential new biomass or carbon storage crop

[Fledermaus]

Boe said cup plant, or Silphium perfoliatum, is a member of the sunflower family found in moist low ground in the eastern Great Plains, where it can grow more than 7 feet tall. It has large seeds and good seedling vigor, and it yields a lot of biomass.

“It’s conspicuous in the prairie as a very productive forb in a tallgrass prairie where you have your major grasses such as big bluestem, switchgrass and prairie cordgrass,” Boe said. “We haven’t come up with too many things to grow with our grasses to add biodiversity to these biofuel mixtures that we’re anticipating growing down the road. It’s very compatible with such things as switchgrass and prairie cordgrass and big bluestem.”

Perennial grasses will always be the base for biomass production, but cup plant is a complementary species, scientists say. Increasing number of species in the mix reduces probability of plant disease and insect pests attacking one species and causing large losses in yield.

Besides Boe and Johnson, other investigators in the project including forage researcher Vance Owens, plant scientist Catherine Carter and biochemist Duane Matthees, all of SDSU; Alex Kahler of Brookings, S.D.-based Biogenetic Services; and professor Ken Albrecht of the University of Wisconsin-Madison, an agronomist. University of Wisconsin research has already looked at cup plant as a perennial silage crop, but exploring it as a biomass crop is new.

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