Data product for "Effects of water and nitrogen availability on nitrogen contribution by the legume, Lupinus argenteus Pursh"

We conducted a greenhouse experiment to examine the separate and interacting effects of water and nitrogen (N) availability on biomass production, tissue N concentration, nodulation, nodule activity, and rhizodeposition of Lupinus argenteus (Pursh), a legume native to sagebrush steppe. Plants were grown in a replicated, randomized block design with three levels of water and four levels of N. Within treatment, we measured above and belowground biomass, tissue nitrogen concentration, acetylene reduction and 15N as estimates of fixation, and exudation of organic nitrogen into the rhizosphere.
Nitrogen-fixing species contribute to ecosystem nitrogen budgets, but background resource levels influence nodulation, fixation, and plant growth. Understanding how the native lupine, L. argenteus, responds to varying water and nitrogen (N) availability can provide insights into its influence on species interactions and community functioning under different environmental conditions and following disturbances such as fire or increased N deposition. Therefore, we examined the separate and interacting effects of water and N availability on N contribution by the native sagebrush legume L. argenteus.
Original metadata date was 05/14/2009. Metadata modified on 03/12/2013 to adjust citation to include the addition of a DOI (digital object identifier) and other minor edits. Minor metadata updates on 12/20/2016.