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Uptake of a Hydrologic Tracer (Bromide) by Ryegrass from Well and Poorly‐Drained Soils
Author(s) -
Schnabel R. R.,
Stout W. L.,
Shaffer J. A.
Publication year - 1995
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1995.00472425002400050015x
Subject(s) - lolium perenne , tracer , bromide , soil water , agronomy , environmental science , drainage , lolium rigidum , lolium , soil fertility , hydrology (agriculture) , chemistry , environmental chemistry , soil science , perennial plant , poaceae , biology , ecology , geology , weed control , physics , geotechnical engineering , herbicide resistance , nuclear physics , organic chemistry
Ryegrass ( Lolium perenne L.) accumulated an average 32% of applied bromide (Br − ) in aboveground biomass. Bromide uptake was greater on a well‐drained soil (38%) than a poorly drained soil (27%). Uptake was also affected by an interaction between season and N fertility. Bromide concentration of ryegrass was affected by interactions between soil drainage and season, and between soil drainage and N fertility. The magnitude of uptake shows Br − to be quite biologically reactive in the soil root zone. The impact of interactions between common experimental variables on Br − uptake makes it difficult to select settings where Br − uptake will be low. Consequently, the amount and pattern of uptake among common experimental variables greatly restricts the settings in which Br − is an appropriate hydrologic tracer.