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The Role of Simulation Models in Monitoring Soil Organic Carbon Storage and Greenhouse Gas Mitigation Potential in Bioenergy Cropping Systems

M. Meki,J. Kiniry,K. D. Behrman,M. Pawlowski,S. Crow

Published 2014 in Unknown venue

ABSTRACT

of SOC to deeper layers, thereby reducing decomposition of SOC and promoting long-term C storage Data from a regional study across 42 paired sites in Minnesota, North Dakota and South showed that switchgrass stored about 2.0 Mg ha −1 of SOC in the 0- to 5-cm depth, 7.7 Mg ha −1 in the 30- to 60-cm depth, and 4.4 Mg ha −1 in the 60- to 90-cm depth [20]. The fraction of SOC stored in deeper (>30 cm) soil profiles is critical for long-term SOC sequestration because this fraction has longer residence times and slower turnover due to reduced microbial processes and fluctuations in soil water content and temperature [21] In central and northwest Europe, annual increases of SOC for the conversion of croplands to miscanthus differed widely among studies and among sites within one study, ranging from 6.9 to 7.7 Mg C ha -1 yr -1 [22 - 24]. Data from soil samples of miscanthus fields and adjacent reference croplands at four different locations showed SOC change rates ranging from 2.6 to 2.8 Mg C ha -1 yr -1 [22], while [23] found change rates of 0.8 to 2.2 Mg C ha -1 yr -1 . Since all the above studies were conducted in central and northwest Europe, this scatter emphasizes the impact of site-specific factors on SOC sequestration. Carbon sequestration rates in miscanthus fields were determined at 0.1-0.2 Mg C ha -1 yr -1 [25], while a comparative study of C seques‐ tration in miscanthus and willow in Poland reported sequestration rates of 0.6 and 0.3 Mg C ha -1 yr -1 , respectively [26]. Observations by [27] show that the establishment of miscanthus on grasslands may lead to SOC losses and that the co-benefit of SOC sequestration mainly occurs under miscanthus established on former croplands.

PUBLICATION RECORD

  • Publication year

    2014

  • Venue

    Unknown venue

  • Publication date

    2014-03-12

  • Fields of study

    Agricultural and Food Sciences, Environmental Science

  • Identifiers
    DOI 10.5772/57177
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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