Contrasts in Areas of Rubber Tree Clones in Regard to Soil and Biomass Carbon Stocks

Revista Brasileira de Ciência do Solo

Anderson Ribeiro Diniz¹  Marcos Gervasio Pereira¹  Fabiano De Carvalho Balieiro¹  Eduardo Vinicius Da Silva¹  Felipe Martini Santos¹  Francy Junio Gonçalves Lisboa¹  Aldo Bezerra De Oliveira¹  Renato Barbosa Da Cruz¹ 

关键词: Hevea brasiliensis;    organic matter;    carbon sequestration;    Hevea brasiliensis;    matéria orgânica;    sequestro de carbono;   

DOI  :  10.1590/01000683rbcs20140274

来源: SciELO

【 摘 要 】

ABSTRACT Rubber tree (Hevea brasiliensis) crop may accumulate significant amounts of carbon either in biomass or in the soil. However, a comprehensive understanding of the potential of the C stock among different rubber tree clones is still distant, since clones are typically developed to exhibit other traits, such as better yield and disease tolerance. Thus, the aim of this study was to address differences among different areas planted to rubber clones. We hypothesized that different rubber tree clones, developed to adapt to different environmental and biological constrains, diverge in terms of soil and plant biomass C stocks. Clones were compared in respect to soil C stocks at four soil depths and the total depth (0.00-0.05, 0.05-0.10, 0.10-0.20, 0.20-0.40, and 0.00-0.40 m), and in the different compartments of the tree biomass. Five different plantings of rubber clones (FX3864, FDR 5788, PMB 1, MDX 624, and CDC 312) of seven years of age were compared, which were established in a randomized block design in the experimental field in Rio de Janeiro State. No difference was observed among plantings of rubber tree clones in regard to soil C stocks, even considering the total stock from 0.00-0.40 m depth. However, the rubber tree clones were different from each other in terms of total plant C stocks, and this contrast was predominately due to only one component of the total C stock, tree biomass. For biomass C stock, the MDX 624 rubber tree clone was superior to other clones, and the stem was the biomass component which most accounted for total C biomass. The contrast among rubber clones in terms of C stock is mainly due to the biomass C stock; the aboveground (tree biomass) and the belowground (soil) compartments contributed differently to the total C stock, 36.2 and 63.8 %, respectively. Rubber trees did not differ in relation to C stocks in the soil, but the right choice of a rubber clone is a reliable approach for sequestering C from the air in the biomass of trees.

【 授权许可】

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