|Title||Effects of nitrogen fertilization on primary production in a Chihuahuan Desert ecosystem|
|Publication Type||Journal Article|
|Year of Publication||1978|
|Authors||Ettershank G, Ettershank J, Bryant M, Whitford WG|
|Journal||Journal of Arid Environments|
|Keywords||article, articles, creosotebush, SEE <LARREA>, Erioneuron,nitrogen fertilization, Erioneuron,primary production, fertilization amendment, grass, Erioneuron, journal, journals, Larrea, also SEE <SHRUB>, Larrea,nitrogen fertilization, Larrea,primary production, nitrogen fertilization,Erioneuron, nitrogen fertilization,Larrea, primary production, Erioneuron, primary production,Larrea|
In a Chihuahuan desert ecosytem, the growth responses to nitrogen amendment of a perennial shrub (creosotebush, Larrea tridentata) and a perennial grass (fluff grass, Erioneuron pulchellum) were made twice during the growing season: first during a period of average rainfall, then during a period of above average rainfall. Fluff grass exhibited a marked increase in biomass to 25 kg ha-1 and 100 kg ha-1 nitrogen fertilization. Creosotebush increased biomass production only at the higher level during both periods. These results suggest that productivity of a Chihuahuan desert system is partially nitrogen limited and that shallow-rooted plants utilized the available nitrogen at the 25 kg ha-1 fertilization level, thus making it unavailable to creosotebush.