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机译:Organic N compounds in plant nutrition: have methodologies based on stable isotopes provided unequivocal evidence of direct N uptake?
CSIRO Agr, GPO Box 1700, Canberra, ACT 2601, Australia;
Univ Melbourne, Fac Vet & Agr Sci, Parkville, Vic, Australia;
Carbon-13; carbon-14; isotope ecology; nitrogen-15; nitrogen uptake; plant nutrition; amino acids; glycine; ammonium; nitrate;