Interference between cheatgrass and yellow starthistle at 3 soil depths
Issue Date
1995-09-01Keywords
rooting depthintraspecific competition
interspecific competition
Centaurea solstitialis
evaporation
seed set
soil depth
crop-weed competition
shoots
ambient temperature
rain
Bromus tectorum
Washington
weight
plant density
plant competition
water stress
Metadata
Show full item recordCitation
Sheley, R. L., & Larson, L. L. (1995). Interference between cheatgrass and yellow starthistle at 3 soil depths. Journal of Range Management, 48(5), 392-397.Publisher
Society for Range ManagementJournal
Journal of Range ManagementDOI
10.2307/4002240Additional Links
https://rangelands.org/Abstract
Cheatgrass (Bromus tectorum L.) and yellow starthistle (Centaurea solstitialis L.) have invaded over 250 thousand hectares throughout the Pacific Northwest. Future management of rangelands dominated by these species will require an understanding of the plant-plant interactions which contribute to the regulation of community dynamics and the establishment of desirable plants. Addition series experiments, with total stand densities ranging from 20-20,000 plants m(-2), were used to quantify the interference between cheatgrass and yellow starthistle in unrestricted soil depths on 12-day intervals throughout the growing season and in soil depths restricted to 0.2- and 0.5-m. Intraspecific interference was nearly twice as important as interspecific interference when plants were grown in unrestricted soil. Resource partitioning by cheatgrass and yellow starthistle was associated with rooting depth. When restricted to a 0.5-m depth, resource partitioning did not occur and intra- and interspecific interference were similar for both species. Restriction to a 0.2-m depth resulted in cheatgrass density being twice as important as yellow starthistle density for predicting yellow starthistle shoot weight. Yellow starthistle density was not important for predicting cheatgrass shoot weight. Cheatgrass appeared to have a competitive advantage over yellow starthistle in shallow soils, but the rooting depth and seed production capacity of yellow starthistle was greater than cheatgrass in deep soil.Type
textArticle
Language
enISSN
0022-409Xae974a485f413a2113503eed53cd6c53
10.2307/4002240