Abstract
We compared the responses of seedlings of introduced Lehmann lovegrass (Eragrostis Lehmanniana Nees) and a native perennial grass, Arizona cottontop (Digitaria californica (Benth.) Henr.) to 7 nitrogen and 2 water treatments to determine if Lehmann lovegrass displayed greater growth or nitrogen use efficiency than Arizona cottontop. After 8 weeks, the lovegrass seedlings had greater shoot N concentrations (2.07 vs. 1.20%), and lower C:N ratios (27.7 vs. 49.6) than Arizona cottontop seedlings. Arizona cottontop seedlings produced more biomass per plant (1.09 vs. 0.31g), exhibited greater nitrogen use efficiency (63 vs. 39%), and tolerated high N levels better. Arizona cottontop may be a superior N competitor under both N-limited and high N conditions, while Lehmann lovegrass may outcompete Arizona cottontop at moderate N levels.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 76-81 |
| Number of pages | 6 |
| Journal | Journal of Range Management |
| Volume | 57 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2004 |
Keywords
- Desert grassland
- Invasive plant
- Nitrogen dynamics
- Nitrogen use efficiency
- Plant strategies
ASJC Scopus subject areas
- Ecology
- Animal Science and Zoology
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