A field method of determining NH4+ and NO3- uptake kinetics in intact roots: Effects of CO2 enrichment on trees and crop species

@article{Bassirirad1999AFM,
  title={A field method of determining NH4+ and NO3- uptake kinetics in intact roots: Effects of CO2 enrichment on trees and crop species},
  author={Hormoz Bassirirad and Stephen A Prior and Rich J. Norby and Hugo H. Rogers},
  journal={Plant and Soil},
  year={1999},
  volume={217},
  pages={195-204}
}
Models describing plant and ecosystem N cycles require an accurate assessment of root physiological uptake capacity for NH4+ and NO3- under field conditions. Traditionally, rates of ion uptake in field-grown plants are determined by using excised root segments incubated for a short period in an assay solution containing N either as a radioactive or stable isotope tracer (e.g., 36ClO3 as a NH4+ analogue, 14CH3NH3 as an NO3- analogue or 15NH4+ and 15NO3-). Although reliable, this method has… CONTINUE READING
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