| |
| DOI: | 10.1093/aob/mci230 |
|---|
| Web URL(s): | https://academic.oup.com/aob/article/96/5/799/180360/Competition-for-Nitrogen-between-Australian-Native
Last checked: 03/02/2017
Access conditions: Item is within a limited-access website |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Badgery, Warwick B.;
Kemp, David R.;
Michalk, David L.;
King, Warren M. C. G. |
|---|
| Author Affiliation: | Badgery and Kemp: Rural Management, University of Sydney/Charles Sturt University, Orange, Australia; Michalk and King: NSW Department of Primary Industries, Orange Agricultural Institute, Orange, Australia |
|---|
| Title: | Competition for nitrogen between Australian native grasses and the introduced weed Nassella trichotoma |
|---|
| Source: | Annals of Botany. Vol. 96, No. 5, October 2005, p. 799-809. |
|---|
| Publishing Information: | London, Oxford University Press |
|---|
| # of Pages: | 11 |
|---|
| Keywords: | TIC Keywords: Rytidosperma racemosum; Biomass; Bothriochloa macra; Competition; Density; Invasive weeds; Microlaena stipoides; Nassella trichotoma; Native grasses; Nitrogen level; Temperate climate; Themeda triandra
|
|---|
| Geographic Terms: | Australia |
|---|
| Abstract/Contents: | "Background and Aims Nassella trichotoma is an unpalatable perennial grass weed that invades disturbed native grasslands in temperate regions of south-eastern Australia. This experiment investigated whether elevated N levels, often associated with disturbance, increases the competitiveness of N. trichotoma relative to C3 and C4 native Australian grasses. Methods A pot experiment investigated competitive interactions between four native grasses, two C3 species (Microlaena stipoides and Austrodanthonia racemosa) and two C4 species (Themeda australis and Bothriochloa macra), and N. trichotoma at three different N levels (equivalent to 0, 60 and 120 kg ha-1) and three competing densities (zero, one and eight neighbouring plants), using an additive design. Key Results All native grasses were competitive with N. trichotoma at low N levels, but only M. Stipoides was competitive at high N. High densities of native grasses (8:1) had a major competitive effect on N. trichotoma at all N levels. The competitive ranking of native grasses, across all N levels, on N. trichotoma was: M. Stipoides > A. Racemosa > B. macra > T. Australis. The C3 species were generally more competitive than the C4 species and C4 grasses were not inherently more productive at low N levels, in contrast to the results of other studies. Conclusion To resist invasion from N. trichotoma, these native grasses need to be maintained at a high density and/or biomass. The results do not support the theory that species such as N. trichotoma, with high tissues density, are always less competitive than those of low tissue density; in this case competitiveness depended on N levels. The ability of N. trichotoma to accumulate biomass at a higher rate than these native grasses, helps to explain why it is a major weed in disturbed Australian native grasslands." |
|---|
| Language: | English |
|---|
| References: | 41 |
|---|
| Note: | Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Badgery, W. B., D. R. Kemp, D. L. Michalk, and W. M. C. G. King. 2005. Competition for nitrogen between Australian native grasses and the introduced weed Nassella trichotoma. Ann. Bot. 96(5):p. 799-809. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=198124 |
| If there are problems with this record, send us feedback about record 198124. |
| Choices for finding the above item: |
|---|
| DOI: 10.1093/aob/mci230 |
| Web URL(s):
https://academic.oup.com/aob/article/96/5/799/180360/Competition-for-Nitrogen-between-Australian-Native
Last checked: 03/02/2017
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: b2209341a |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
