Effects of different management models on soil organic carbon of natural secondary forests of Quercus Mongolica in China

He, Y. [Yating]., He, Y.  [Youjun]

Effects of different management models on soil organic carbon of natural secondary forests of Quercus Mongolica in China

Autores

He, Y. [Yating]., He, Y. [Youjun]

Editor

FAO ;

Descripción

How to improve soil organic carbon content and stock has become the emerging scientific issues under the background of low soil fertility of natural secondary forests in Northeast China. In this study,, we will analyze the impacts of natural restoration management regime, target tree-based forest management regime, and conversion to mixed local valuable broadleaved forest management regime for secondary Quercus mongolica forest on soil organic carbon stocks in a forestry fram of Heilongjiang province. The result showed: (1) SOC content ranked as target tree-based forest management ＞ natural restoration management ＞ conversion to mixed local forest management, and TN,TP, AN, AP and water content were the key factors impacted the SOC content; (2) The different management have no impact on cfPOC and MOC, but the ffPOC content was significantly decreased under target tree-based forest management, while iPOC content was significantly increased under conversion to mixed local forest management; (3) The relative proportion of the functional groups were ranked as O-alkyl C > alkyl C > aromatic C > carbonyl C; (4) MBC was rankded as target tree-based forest management ＞ natural restoration management ＞ conversion to mixed local forest management, and the invertase activity and catalase activity were increased under target tree-based forest management, while urease activity was increased under conversion to mixed local forest management; (5) The carbon sequestration potential was ranked as conversion to mixed local forest management ＞ natural restoration management ＞ target tree-based forest management. In conclusion, these results indicated that the target tree-based forest management has the highest potential to sequestrated carbon in forest soil, and it is a rational management to increase SOC, while conversion to mixed local forest management lead to a loss of SOC and need to protect and repair in future to increase the SOC content. Keywords: Sustainable forest management, Deforestation and forest degradation, Deforestation and forest degradation; Adaptive and integrated management, Policies ID: 3486596