Reserving nitrogen in soils through microbial nitrate reduction to ammonium
Grant number: DP160101028 | Funding period: 2016 - 2019
This project aims to identify those microbes able to transform nitrate to ammonium and thus increase soil nitrogen conservation. More than 50 per cent of the nitrogen in fertilisers applied to soils is lost into the environment, which is both a financial loss to farmers and a main anthropogenic source of nitrogen pollution. Some microbes can transform nitrate into ammonium through dissimilatory reduction (DNRA) and thus increase soil nitrogen retention. However, the DNRA process and the responsible microbial groups remain largely unknown. This project plans to use isotope tracing and biomolecular approaches to identify those DNRA microbial groups and elucidate the DNRA reaction process. The ..View full description
Related publications (16)
Dissimilatory nitrate ammonification and N(2)fixation helps maintain nitrogen nutrition in resource-limited rice paddies
Arjun Pandey, Helen Suter, Ji-Zheng He, Hang-Wei Hu, Deli Chen
Un-fertilized rice paddies have shown maintained soil nitrogen (N) status, stable N supply to the rice plant and sustained rice yi..
Comammox Nitrospira play an active role in nitrification of agricultural soils amended with nitrogen fertilizers
Chaoyu Li, Hang-Wei Hu, Qing-Lin Chen, Deli Chen, Ji-Zheng He
The recent discovery of complete ammonia oxidizers (comammox Nitrospira) challenged the paradigm of the two-step nitrification med..
Dissimilatory nitrate reduction to ammonium dominates nitrate reduction in long-term low nitrogen fertilized rice paddies
Arjun Pandey, Helen Suter, Jim He, Hangwei Hu, Deli Chen
Dissimilatory nitrate reduction to ammonium (DNRA) and diazotrophic N2 fixation contribute to nitrogen (N) supply in rice paddies,..
Effects of nitrification inhibitors on gross N nitrification rate, ammonia oxidizers, and N2O production under different temperatures in two pasture soils
Ting Lan, Helen Suter, Rui Liu, Shu Yuan, Deli Chen
Australian pasture soil for cattle and sheep industries constitutes the principal land use with considerable N fertilizer consumpt..
Nitrifier-induced denitrification is an important source of soil nitrous oxide and can be inhibited by a nitrification inhibitor 3,4-dimethylpyrazole phosphate
Xiuzhen Shi, Hang-Wei Hu, Xia Zhu-Barker, Helen Hayden, Juntao Wang, Helen Suter, Deli Chen, Ji-Zheng He
Soil ecosystem represents the largest contributor to global nitrous oxide (N2 O) production, which is regulated by a wide variety ..
Effects of the nitrification inhibitor acetylene on nitrous oxide emissions and ammonia-oxidizing microorganisms of different agricultural soils under laboratory incubation conditions
Rui Liu, Helen L Hayden, Hangwei Hu, Jizheng He, Helen Suter, Deli Chen
Acetylene (C2H2) is an effective nitrification inhibitor targeting autotrophic ammonia oxidizers, and has shown promise for improv..
Response of ammonia oxidizers and denitrifiers to repeated applications of a nitrification inhibitor and a urease inhibitor in two pasture soils
Xiuzhen Shi, Hang-Wei Hu, Kevin Kelly, Deli Chen, Ji-Zheng He, Helen Suter
Purpose: The nitrification inhibitor 3,4-dimethylpyrazol-phosphate (DMPP) and the urease inhibitor N-(n-butyl) thiophosphoric tria..
The effect of temperature and moisture on the source of N2O and contributions from ammonia oxidizers in an agricultural soil
Rui Liu, Helen L Hayden, Helen Suter, Hangwei Hu, Shu Kee Lam, Jizheng He, Pauline M Mele, Deli Chen
In recent years, identification of the microbial sources responsible for soil NâO production has substantially advanced with the..
Effects of 3,4-dimethylpyrazole phosphate (DMPP) on nitrification and the abundance and community composition of soil ammonia oxidizers in three land uses
Xiuzhen Shi, Hangwei Hu, Jizheng He, Deli Chen, Helen Charlotte Suter
The application of the nitrification inhibitor, 3,4-dimethylpyrazole-phosphate (DMPP), is considered as an effective strategy to m..
Nitrification Is a Primary Driver of Nitrous Oxide Production in Laboratory Microcosms from Different Land-Use Soils
Rui Liu, Hangwei Hu, Helen Suter, Helen L Hayden, Jizheng He, Pauline Mele, Deli Chen
Most studies on soil N2O emissions have focused either on the quantifying of agricultural N2O fluxes or on the effect of environme..
Effects of the Nitrification Inhibitor 3,4-Dimethylpyrazole Phosphate on Nitrification and Nitrifiers in Two Contrasting Agricultural Soils
Xiuzhen Shi, Hang-Wei Hu, Christoph Mueller, Ji-Zheng He, Deli Chen, Helen Charlotte Suter
UNLABELLED: The nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) is a powerful tool that can be used to promote nitro..