Effects of the Long-effect Additive (NAM), Dicyandiamide (DCD), and Organic C Additions on N Transformation in Soil

DOI

10.2991/eers-15.2015.2How to use a DOI?

Keywords

NAM; DCD; urea; soil microbial biomass N; fixed NH4+; glucose

Abstract

A 30-day incubation experiment was conducted to investigate the effects of a long-effect additive (NAM), dicyandiamide (DCD), and glucose additions on N transformation in soil. The results showed that both NAM and DCD enhanced N transformation into soil microbial biomass N and fixed NH4+. Glucose addition enhanced transformation of N into soil microbial biomass N, consequently decreased soil mineral N and fixed NH4+ At the end of the incubation, NAM favored to increase soil mineral N, indicating the higher availability of N. Overall, our research identified that N can be stabilized in soil by the processes of microbial immobilization and mineral fixation, which were enhanced with the addition of NAM and DCD, reducing N losses and remaining N availability, especially for NAM. Although organic C addition increased microbial immobilization of N, the availability of N was significantly lowered. Therefore, the rate and time of organic C application should be regulated to optimize N management practices.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Shaobo Fan
AU  - Wantai Yu
PY  - 2015/09
DA  - 2015/09
TI  - Effects of the Long-effect Additive (NAM), Dicyandiamide (DCD), and Organic C Additions on N Transformation in Soil
BT  - Proceedings of the 2015 International Conference on Environmental Engineering and Remote Sensing
PB  - Atlantis Press
SP  - 6
EP  - 8
SN  - 2352-538X
UR  - https://doi.org/10.2991/eers-15.2015.2
DO  - 10.2991/eers-15.2015.2
ID  - Fan2015/09
ER  -