Nitrification in three soils amended with zinc sulfate |
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Authors: | D.O. Wilson |
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Affiliation: | Department of Agronomy, University of Georgia, Georgia Station, Experiment, GA 30212 U.S.A. |
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Abstract: | Zinc as ZnSO4 was added to three soils at rates of 0, 10, 100 and 1000 μg Zn g?1 soil. The soils were uniformly treated with 100 μg Ng?1 as nh4cl, incubated at 30°C and NH4+-N and (NO3? + NO2?)-N determined weekly for 7 weeks. Nitrification in all three soils was totally inhibited by 1000 μg Zn g?1. At the 100 μg Zn g?1 rate, nitrification was significantly reduced in two of the three soils during some part of the incubation. This differential effect on nitrification at the 100 μg Zn g?1 rate was related to differences in soil properties. These results imply that, with respect to nitrification, care should-be taken not to apply Zn-containing materials indiscriminately to soils. |
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