title: An empirical model for estimating CO2exchange of Bouteloua gracilis (H.B.K.) Lag. in the shortgrass prairie.
abstract: An empirical model for predicting net photosynthesis (PN) and dark respiration (RD) in the field was developed and tested for Bouteloua gracilis (H.B.K.) Lag., the dominant C4grass of the North American shortgrass prairie. PNis predicted as a function of soil water potential, canopy air temperature, irradiance, and plant age, while RDis expressed as a function of soil water potential and temperature. The model accounted for 85% of the variability in the data base used to estimate parameter values. Results of a validation test showed good agreement between observed and predicted PNrates, suggesting this approach would be useful as a submodel of a grassland ecosystem model.
authors.affiliation: Natural Resource Ecology Laboratory, Colorado State University, 80523, Fort Collins, CO, USA.
authors.forename: J K
authors.initials: JK
authors.lastname: Detling
authors.affiliation: Natural Resource Ecology Laboratory, Colorado State University, 80523, Fort Collins, CO, USA.
authors.forename: W J
authors.initials: WJ
authors.lastname: Parton
authors.affiliation: Natural Resource Ecology Laboratory, Colorado State University, 80523, Fort Collins, CO, USA.
authors.forename: H W
authors.initials: HW
authors.lastname: Hunt