1. Accelerating the development of biological nitrification inhibition as a viable nitrous oxide mitigation strategy in grazed livestock systems.
- Author
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de Klein, Cecile A. M., Bowatte, Saman, Simon, Priscila L., Arango, Jacobo, Cardenas, Laura M., Chadwick, David R., Pijlman, Jeroen, Rees, Robert M., Richards, Karl G., Subbarao, Guntur V., and Whitehead, David
- Subjects
NITROUS oxide ,NITRIFICATION ,LIVESTOCK ,REDUCTION potential ,SOIL fertility ,GREENHOUSE gas mitigation - Abstract
This position paper summarizes the current understanding of biological nitrification inhibition (BNI) to identify research needs for accelerating the development of BNI as a N
2 O mitigation strategy for grazed livestock systems. We propose that the initial research focus should be on the systematic screening of agronomically desirable plants for their BNI potency and N2 O reduction potential. This requires the development of in situ screening methods that can be combined with reliable N2 O emission measurements and microbial and metabolomic analyses to confirm the selective inhibition of nitrification. As BNI-induced reductions in N2 O emissions can occur by directly inhibiting nitrification, or via indirect effects on other N transformations, it is also important to measure gross N transformation rates to disentangle these direct and indirect effects. However, an equally important challenge will be to discern the apparent influence of soil N fertility status on the release of BNIs, particularly for more intensively managed grazing systems. [ABSTRACT FROM AUTHOR]- Published
- 2022
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