Soil carbon sequestration under     Miscanthus x giganteus      A large scale survey          Jesko Zimmermann            ...
MiscanthusMiscanthus x giganteus• Ligno-cellulosic or „second generation“ bioenergy crop• Rhizomatous perennial grass with...
Research questionsResearch on carbon sequestration mainly on   experimental fields, however differences can be   expected ...
Regional-scale study
Materials & Methods          Sampling          Nested sampling design          A number of soil cores taken at three      ...
Materials & Methods          Analyses          The bulked samples were processed in the          lab and following measure...
SOC [Mg ha-1]                                                         SOC [Mg ha-1]                    -10.00     0.00   1...
Field-scale study                    Picture: Susannah Cass
MG14                TCD_2_1Average patch area   4.357 m2            3.710 m2Standard deviation   8.702               25.24...
Farm   Area [m2]     SD       Radius [m]    SDMT3             8.672     6.287        1.519     0.691MT5             8.151 ...
MG11                                                                              MG18                                    ...
Miscanthus-derived carbon [Mg ha-1]-0.50      0.50       1.50       2.50   -0.50        0.50      1.50    2.50   10       ...
Farm scale
High                                                                 MT6_2      Mean                                      ...
ConclusionsMeasurable soil carbon sequestration even 2 to 3years after planting MiscanthusNo significant loss of soil orga...
Acknowledgements      David Bourke                        Susannah Cass      Kees-Jan van Groenigen              Kate Hart...
Soil carbon sequestration under Miscanthus x giganteus - Jesko Zimmermann
Soil carbon sequestration under Miscanthus x giganteus - Jesko Zimmermann
Soil carbon sequestration under Miscanthus x giganteus - Jesko Zimmermann
Soil carbon sequestration under Miscanthus x giganteus - Jesko Zimmermann
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Soil carbon sequestration under Miscanthus x giganteus - Jesko Zimmermann

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Soil carbon sequestration under Miscanthus x giganteus - Jesko Zimmermann

  1. 1. Soil carbon sequestration under Miscanthus x giganteus A large scale survey Jesko Zimmermann Jens Dauber Michael B. Jones
  2. 2. MiscanthusMiscanthus x giganteus• Ligno-cellulosic or „second generation“ bioenergy crop• Rhizomatous perennial grass with a C4 photosynthesis pathway• Originates in Asia (tropics and subtropics)• Remarkable adaptability to cool temperate climates• Introduction subsidised in IrelandSoil carbon sequestration potential due to physiological features and management practices Picture: Jens Dauber
  3. 3. Research questionsResearch on carbon sequestration mainly on experimental fields, however differences can be expected in commercial plotsThis study is focused on commercial large-scale Miscanthus fields in south east Ireland, looking at:• Soil carbon sequestration• Initial soil carbon loss• What is influencing the processes? Picture: Susannah Cass
  4. 4. Regional-scale study
  5. 5. Materials & Methods Sampling Nested sampling design A number of soil cores taken at three subplots in a Miscanthus field and an adjacent control site representing the former land-use Cores divided into three depth and bulked over the sub plot. Additional cores taken for bulk density
  6. 6. Materials & Methods Analyses The bulked samples were processed in the lab and following measurements were taken: Total organic carbon 13C/12C stable isotope ratio to determine the Miscanthus-derived carbon (13C natural abundance method) Soil bulk density, particle size distribution, and pH
  7. 7. SOC [Mg ha-1] SOC [Mg ha-1] -10.00 0.00 10.00 20.00 30.00 40.00 -10.00 0.00 10.00 20.00 30.00 40.00 Control Control 10 10 Miscanthus Miscanthus Control ControlDepth [cm] Depth [cm] 20 20 Miscanthus Miscanthus Control Control C3-derived carbon C4-derived carbon 30 30 Miscanthus Miscanthus Tillage GrasslandAfter Zimmermann et al., (2012) Global Change Biology Bioenergy, Vol. 4, Issue 4.
  8. 8. Field-scale study Picture: Susannah Cass
  9. 9. MG14 TCD_2_1Average patch area 4.357 m2 3.710 m2Standard deviation 8.702 25.245No. Patches 901 1243Sum of patch area 0.393 ha 0.461 haOverall field size 4.390 ha 3.982 haShare of field 8.95 % 11.58 % Zimmermann et al. (in prep.)
  10. 10. Farm Area [m2] SD Radius [m] SDMT3 8.672 6.287 1.519 0.691MT5 8.151 4.111 1.570 0.372MT6 10.595 6.028 1.772 0.496MG11 18.185 14.109 2.233 0.923MG18 4.329 1.965 1.146 0.264MG20 10.488 6.335 1.751 0.537
  11. 11. MG11 MG18 MG20 Farm MT3 High MT5 Medium MT6 Low-50 -40 -30 -20 -10 0 Difference to area of a non-patch field [%] Zimmermann et al. (in prep.)
  12. 12. Miscanthus-derived carbon [Mg ha-1]-0.50 0.50 1.50 2.50 -0.50 0.50 1.50 2.50 10 10 20 20 High density 30 Open patch 30 Tillage Grassland Zimmermann et al. (in prep.)
  13. 13. Farm scale
  14. 14. High MT6_2 Mean MT6_1 Low MT5 MT3 MG20 MG18 MG11-40 -30 -20 -10 0 Difference in Miscanthus-derived carbon to a no-patch field [%]
  15. 15. ConclusionsMeasurable soil carbon sequestration even 2 to 3years after planting MiscanthusNo significant loss of soil organic carbon due toplantationHigh variability between farmsCrop patchiness has significant impact on yield andsoil carbon sequestration
  16. 16. Acknowledgements David Bourke Susannah Cass Kees-Jan van Groenigen Kate HarteBas Boots The Simbiosys TeamKatie WennigCatherine Fontana The land-owners for theirZeno Wong kind permission to work onMaximilian von Sternburg their landsErin Jo TiedekenSarah Kimberley The EPA for funding the project

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