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Nitrous oxide emissions from applied nitrate fertiliser in commercial cherry orchards

Quin, P ORCID: 0000-0002-7339-3082, Swarts, N ORCID: 0000-0002-4527-7658, Oliver, G, Paterson, S, Friedl, J and Rowlings, D 2021 , 'Nitrous oxide emissions from applied nitrate fertiliser in commercial cherry orchards' , Soil Research, vol. 59, no. 1 , pp. 60-67 , doi: 10.1071/SR19333.

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The application of nitrate (NO3-) fertiliser is important worldwide in providing nitrogen (N) nutrition to perennial fruit trees. There is little information available on N losses to the environment from commercial cherry orchards, in relation to different timings of NO3- application. The emission of nitrous oxide (N2O) gas is an important greenhouse gas loss from NO3- application, being responsible for 6% of anthropogenic global warming and a catalyst for depletion of stratospheric ozone. In a commercial sweet-cherry orchard in southern Tasmania, we applied 373 g NO3--N m-2 (equivalent to 90 kg NO3--N ha-1) either pre- or post-harvest, or equally split between the two, to study the resultant N2O emissions. Emissions averaged 8.37 mg N2O-N m-2 day-1 during the pre-harvest period, primarily driven by a heavy rainfall event, and were significantly greater (P -1 mg N2O-N m-2 day-1 from post-harvest NO3- application. Discounting the emissions related to the rainfall event, the resultant average 1.88 mg N2O-N m-2 day-1 for the rest of the pre-harvest emissions remained significantly greater (P 2O emissions in perennial tree cropping systems.

Item Type: Article
Authors/Creators:Quin, P and Swarts, N and Oliver, G and Paterson, S and Friedl, J and Rowlings, D
Keywords: 15N, application timing, nitrate fertiliser, nitrous oxide emissions, soil moisture, sweet cherry, cherries, fertigation
Journal or Publication Title: Soil Research
Publisher: CSIRO Publishing
ISSN: 1838-675X
DOI / ID Number: 10.1071/SR19333
Copyright Information:

Journal compilation copyright CSIRO 2021

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