Uptake of a Hydrologic Tracer (Bromide) by Ryegrass from Well and Poorly-Drained Soils
- R. R. Schnabel *,
- W. L. Stout and
- J. A. Shaffer
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.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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