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Full-Text Articles in Agriculture
Spatio-Temporal Relationship Between Water Depletion And Root Distribution Patterns Of Centaurea Solstitialis And Two Native Perennials, Stephen L. Young, Guy B. Kyser, Jacob N. Barney, Victor P. Claassen, Joseph M. Ditomaso
Spatio-Temporal Relationship Between Water Depletion And Root Distribution Patterns Of Centaurea Solstitialis And Two Native Perennials, Stephen L. Young, Guy B. Kyser, Jacob N. Barney, Victor P. Claassen, Joseph M. Ditomaso
West Central Research and Extension Center, North Platte
In a 2-year field study, we quantified lateral root growth patterns and soil water depletion dynamics in the invasive annual Centaurea solstitialis and two native perennials, Elymus glaucus and Grindelia camporum. Centaurea solstitialis produced lateral roots most actively from early April to mid-June, during the late rosette to spiny seedhead stage while both root growth and water depletion were completed before flowering. In the wet year, roots were evenly distributed throughout the soil profile to 180 cm deep. Lack of deep soil moisture recharge in the second year restricted root distribution to shallow soil depths (< 60 cm). In contrast to C. solstitialis, …
Functionally Similar Species Confer Greater Resistance To Invasion: Implications For Grassland Restoration, Stephen L. Young, Jacob N. Barney, Guy B. Kyser, Tracy S. Jones, Joseph M. Ditomaso
Functionally Similar Species Confer Greater Resistance To Invasion: Implications For Grassland Restoration, Stephen L. Young, Jacob N. Barney, Guy B. Kyser, Tracy S. Jones, Joseph M. Ditomaso
West Central Research and Extension Center, North Platte
Plant community functional composition can be manipulated in restored ecosystems to reduce the establishment potential of invading species. This study was designed to compare invasion resistance among communities with species functionally similar or dissimilar to yellow starthistle (Centaurea solstitialis), a late-season annual. A field experiment was conducted in the Central Valley of California with six experimental plant communities that included (1) six early-season native annual forbs (AF); (2) five late-season native perennials and one summer annual forb (NP); (3) a combination of three early-season native annual forbs and three late-season native perennials (FP); (4) six early-season non-native annual …