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- Title
The dynamics of dissolved organic N in the fumigated soils.
- Authors
Zhang, Chenglei; Li, Guitong; Lin, Qimei; Cao, Aocheng; Zhao, Xiaorong
- Abstract
The aim of this study was to investigate the dynamics of dissolved organic N in soils fumigated separately with chloropicrin (CP), 1,3-dichloropropene, and metam sodium (MS) for 7 days and then incubated at 25°C for 84 days. The dissolved organic N (DON) at 14 days after fumigation was mainly dissolved amino acids (DAA) which were then rapidly mineralized to ammonium. However, the DON pool at later incubation times was mainly high molecular weight organic N which was resistant to microbial decomposition. Three soil fumigants all increased the proportions of DON in total dissolved N and DAA in DON. Dissolved organic N became much more important mobile N source in CP- and MS-fumigated soils, and this may increase the risks of DON leaching in agricultural ecosystems.
- Subjects
HISTOSOLS; FUMIGATION; SOIL fumigation; FUMIGANTS; AMMONIUM; CHLOROPICRIN
- Publication
Biology & Fertility of Soils, 2011, Vol 47, Issue 7, p833
- ISSN
0178-2762
- Publication type
Article
- DOI
10.1007/s00374-011-0544-6