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Evaluation of GHG in pastures with foliar N fertilizers

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Presented by María De Bernadi May 16, 2019, as part of the second CCAFS & GRA CLIFF-GRADS Webinar Series. See the Introduction for more details: 2019 CLIFF-GRADS Webinar Series - Direct measurement approaches to investigating mitigation options in livestock systems.

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Evaluation of GHG in pastures with foliar N fertilizers

  1. 1. María De Bernardi Evaluation of GHG in pastures with foliar N fertilizers Project: Nitrous oxide emissions from pastures using novel fertilizer formulations
  2. 2. Purpose of research Nitrogen Use Efficiency (NUE) in PASTURES Foliar N fertilizer and N nanofertilizer Major goals • Increase pasture NUE using a foliar N formulations in pasture • Determining N balance • The effect in N cycling Objective • Measured N2O emission and NH3 volatilization • My contribution was in measuring and interpretation of CH4 flux
  3. 3. Research methods • Research site Conditions:  Tempeture 20°C (Control temperature room)  50%WHC Pre-essay site: INIA Remehue Essay site: INIA La Pampa
  4. 4. Research methods • Control (bare soil) • Control (With plant) Fertilizers • Nanofertilizer 1 (Hap) • Nanofertilizer 2 (comertial) • N Foliar (Ammonium nitrate) • Urea disolved Water • Granular Urea Pre-essay Essay CH4 and N2O Fluxes Ammonium volatilization Soil parameters (nutrients, bulk density, humidity) Plant parameters (total N and C, dry mass)
  5. 5. Results • Pre-essay 0 110 220 330 440 550 0,00 0,04 0,08 0,12 0,16 0,20 0,24 0,28 0,32 N2 OFlux(mgN2 O-Nh -1 m -2 ) Time (hs) Control with plant Urea disolve in water Ammonium nitrate Nano-comertial Nano-INIA -0,05 -0,04 -0,03 -0,02 -0,01 0,00 Control Disolve Urea Control Ammonium nitrate 0 110 220 330 440 550 -0,05 -0,04 -0,03 -0,02 -0,01 0,00 Control Nitramin Time (hs)Time (hs) 0 110 220 330 440 550 Control Nanop CH4 flux(mgCH4 -Ch -1 m -2 ) • Principal essay: Expectations Sampling times: periodicity and range Wetting period Principals differences
  6. 6. Advice to future CLIFF-GRADS students • Get involve completely in fieldwork as a organizer and a person in charge • Get involve in results and discussion • Continue in touch with yours host researchers

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