Abstract
Global energy production is in high demand and is expanding its
development into new landscapes, including grasslands. This expansion
has intensive impacts on above and belowground components of grasslands
which need to be addressed during reclamation to promote long-term
ecological integrity. This study was conducted to ascertain how
alternative reclamation practices may improve soil structure (i.e.,
compaction) while aiding in the creation of conditions that are
conducive for both the establishment and continued growth of native
grassland plant species. The grassland was reclaimed with different
combinations of seeding mixtures (grass or grass and forb), ripping
techniques (subsoil ripping or topsoil ripping), and the integration of
mulch into the soil profile. Species composition and abundance of the
vegetation community was estimated, and volumetric soil moisture and
penetration resistance readings were obtained. Year, seed mixtures,
ripping techniques and their interactions significantly affected
community composition and species diversity. Topsoil-ripping and
grass-forb treatment had a higher association with native, perennial
grasses while subsoil-ripping and grass treatment favor more short-lived
species. Similar trends persisted across penetration resistance and soil
moisture readings where topsoil-ripping and grass-forb treatment were
different from subsoil-ripping and Grass treatments (p<0.10).
Additionally, Kentucky bluegrass, an invasive grass species, increased
76% over one year and was more common in the topsoil-ripping and
grass-forb treatments. While early in the reclamation process, results
suggest topsoil-ripping and grass-forb treatment are a promising
combination reclamation practice that can establish a native grassland
community and initiate the improvement of compacted soil conditions.