Rangeland Ecology & Management

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Germination and Seedling Emergence of Three Semiarid Western North American Legumes
Author
Bushman, B. S.
Johnson, D. A.
Connors, K. J.
Jones, T. A.
Publisher
Society for Range Management
Publication Year
2015-11
Body

Few seed sources of North American forbs are available for revegetation/restoration of degraded western rangelands adapted to annual precipitation zones less than 300 mm, and those that are available are mainly wildland collected. The amount of time and resources necessary to make wildland collections in quantity results in high seed prices and variable seed quality, such that forbs have been under-represented in rangeland seeding mixes. We have previously identified western prairie clover (Dalea ornata Douglas ex Hook.), Searls' prairie clover (Dalea searlsiae A. Gray), and basalt milkvetch (Astragalus filipes Torr. ex A. Gray) as native species adapted to low precipitation zones in the western United States for which field-grown seed production would potentially reduce seed costs and increase availability. A series of glasshouse experiments were conducted to determine the effects of scarification, planting depth, and soil composition on germination and seedling emergence of these species. All three species produce hard seeds, and scarification was necessary to increase germination and seedling emergence. Compared with a 6-mm planting depth, a planting depth of 19 mm retarded the rate of emergence for all species but only reduced the total seedling emergence for basalt milkvetch. With seed scarification in sandy soils, prairie clover seedling emergence exceeded 80% while basalt milkvetch was less than 10%. With seed scarification in soils with higher clay content, prairie clover total seedling emergence reduced to 58-70% while basalt milkvetch increased to approximately 30%. Along with enhancing stand establishment in seed production fields, these data will assist land managers in planning for optimal establishment of these species in rangeland revegetation/restoration projects. © Published by Elsevier Inc. On behalf of Society for Range Management. The Rangeland Ecology & Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.

Language
en
Resource Type
Text
Document Type
Journal Issue/Article
Digital Object Identifier (DOI)
10.1016/j.rama.2015.08.002
Additional Information
Bushman, B. S., Johnson, D. A., Connors, K. J., & Jones, T. A. (2015). Germination and Seedling Emergence of Three Semiarid Western North American Legumes. Rangeland Ecology & Management, 68(6), 501–506.
IISN
0022-409x
OAI Identifier
oai:repository.arizona.edu:10150/656893
Journal Volume
Rangeland Ecology & Management
Journal Number
68
Journal Pages
6
Journal Name
Rangeland Ecology & Management
Keywords
Astragalus filipes
Dalea ornata
Dalea searlsiae
revegetation
seed germination
seed scarification