Journal article

Decreasing ammonia loss from an Australian pasture with the use of enhanced efficiency fertilizers

Shu Kee Lam, Helen Suter, Mei Bai, Charlie Walker, Arvin R Mosier, Hans van Grinsven, Deli Chen

Agriculture Ecosystems & Environment | Elsevier BV | Published : 2019


Mitigating ammonia (NH3) volatilization from intensive pasture systems is critical for environmental sustainability. However, field-scale evaluation on the potential of enhanced efficiency fertilizers (e.g. urease inhibitors and controlled-release fertilizers) in mitigating NH3 volatilization is limited. Using a micrometeorological technique, we conducted two field trials to investigate the effects of Green UreaNV® (urea coated with the urease inhibitor N-(n-butyl)thiophosphoric triamide, NBPT) and polymer-coated urea (a controlled-release fertilizer) on NH3 volatilization from an intensive rainfed pasture in southern Australia. We found that NH3 volatilization from urea was 5.8 and 5.6 kg N..

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Awarded by Australian Research Council Linkage Project

Funding Acknowledgements

This research was undertaken as part of the National Agricultural Nitrous Oxide Research Program funded by the Australian Department of Agriculture and Incitec Pivot Fertilisers. The authors acknowledge support from Australian Research Council Linkage Project (LP160101417). The authors thank Rick Jordan for site access and assistance in site selection, Dr. Hang-wei Hu, Dr. Rui Liu, Dr. Trevor Coates, Miss Sima Mazaheri and Mr. Eric Ireland for field assistance and soil chemical analyses, and Miss Baobao Pan for assistance with figure preparation.