Above- and below-ground carbon accumulation and biomass allocation in poplar short rotation plantations under Mediterranean conditions

作者：Oliveira N^*; Rodriguez Soalleiro R; Perez Cruzado C; Canellas I; Sixto H; Ceulemans R

来源：Forest Ecology and Management, 2018, 428: 57-65.

DOI：10.1016/j.foreco.2018.06.031

• Root biomass
• Below-ground allometry models
• Populus spp.
• Root:shoot ratio
• Short Rotation Coppice (SRC)

Beside the production of biomass, short rotation coppice (SRC) poplar plantations can also contribute to carbon sequestration in the soil through their below-ground biomass. The present study evaluated the allocation of above and below-ground biomass at the end of the first rotation of four SRC plantations under Mediterranean conditions. The genotypes evaluated are commonly used for biomass plantations, i.e. genotypes 'AF2' and 'I-214' (Populus x canadensis Manch), and 'Monviso' (P. x generosa Henry x P. nigra L.). No significant differences among genotypes were found with regard to below-ground biomass yield. The root:shoot ratio decreased in line with the growth in shoot basal diameter, with values ranging from 0.15 to 0.26. The accumulation of carbon in the below-ground fraction of the biomass ranged from 0.86 to 0.91 Mg C ha(-1) yr(-1), whereas the above-ground carbon accumulation ranged from 3.89 to 6.48 Mg C ha(-1) yr(-1). A general as well as a genotype-specific allometric model allowed to accurately predict the below-ground biomass yield using shoot basal diameter as the predictor variable. Both models provide an important tool to quantify the carbon accumulated in the below ground fraction of the biomass.

• 出版日期2018-11-15