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Title: PLANT GROWTH AND PHOSPHORUS UPTAKE KINETICS OF THREE RIPARIAN GRASS SPECIES

Author
item Kovar, John
item CLAASSEN, N - GOETTINGEN UNIV. GERMANY

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 11/10/2005
Publication Date: 11/10/2005
Citation: Kovar, J.L., Claassen, N. 2005. Plant growth and phosphorus uptake kinetics of three riparian grass species [abstract]. ASA-CSSA-SSSA Annual Meeting Abstracts. ASA-CSSA-SSSA Annual Meeting. Nov. 6-10, 2005, Salt Lake City, UT.

Interpretive Summary:

Technical Abstract: Phosphorus (P) losses from agricultural landscapes contribute significantly to eutrophication of surface waters. The total amount of P absorbed by plants growing in or near grass filter strips and riparian buffers can be determined, but we have little knowledge of the pattern of accumulation/depletion during the course of a growing season, nor do we understand how plants respond to influxes of dissolved P that occur after rainfall events. In this study, we evaluated P acquisition efficiency of switchgrass (Panicum virgatum L.), smooth bromegrass (Bromus inermis Leyss.) and reed canarygrass (Phalaris arundinacea L.) grown in a flowing nutrient solution culture system at mean solution P concentrations of 1 and 100 µmol L-1. Plants were harvested four times. Changes in shoot and root growth, P influx, and P uptake kinetics were determined, and species differences compared.