To mitigate the input of agriculture on global warming, a major task is the development of agents that reduce the production of greenhouse gas emissions, particularly nitrous oxide emissions, from soil. The fungicide pyraclostrobin (F500�) from BASF was tested at the University of Hohenheim on its N2O-emission reduction potential. In addition, changes in biomass were studied after a spray application of pyraclostrobin to corn. A greenhouse study was carried out with wheat and corn using soil taken from the Ah horizon of an agricultural Cambisol. The pots were fertilized with 120 kg ha-1 NH415NO3. Three treatments were conducted 1) no further addition (Control, NF), 2) 250 g ha-1 pyraclostrobin (NF+F500), 3) 250 g ha-1 NI (NF+NI), (NI=commercial nitrification inhibitor). Gas samples were taken from all pots two times a week (11 times in total) using a closed-chamber system for the determination of N2O emissions and the isotopic ratio of 15N/14N of N2O. Soil samples were taken weekly for total N content.  N2O-emissions, isotopic ratio of 15N/14N of N2O and N content in the soil had similar patterns over the same time in all treatments. During the first 5 days after the application, N2O-emissions increased in all treatments due to fertilization. From day 5 to 25, cumulated N2O-emissions in NF+F500 and in NF+NI were significantly lower (p<0.05) than in the NFtreatment.  Overall, pyraclostrobin reduced N2O-emissions from soil. In addition, pyraclostrobin enhanced plant biomass of maize up to 10 %.

Reduction of N<sub>2</sub>O-emission by pyraclostrobin

248th National Meeting (2014)

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Reduction of N2O-emission by pyraclostrobin

Reduction of N₂O-emission by pyraclostrobin