Aggregate Development and Organic Matter Storage in Mediterranean Mountain Soils

作     者：R.M.POCH M.ANTúNEZ 

作者机构：Department of Environment and Soil ScienceUniversity of Lleida. Centre Tecnològic Forestal de Catalunya 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2010年第20卷第6期

页      面：702-710页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：Supported by the Ministry of Education and Science of Spain (No. SUM2006-00029-C02) 

主　　题：aggregate stability Catalonia macroaggregates organic carbon soil carbon storage 

摘      要：Soil aggregation and organic matter of soils from the pre-Pyrenean range in Catalonia (NE Spain) were studied,in order to assess their quality as carbon sinks and also to select the best soil management practices to preserve their *** stability,organic carbon and micromorphology were *** highest amount of organic carbon was found in alluvial,deep soils (228 Mg C ha -1 ),and the lowest was in a shallow,stony soil with a low plant cover (78 Mg C ha -1 ).Subsurface horizons of degraded soils under pastures were the ones with smaller and less-stable *** residues of organic matter (OM) were found mostly in interaggregate *** the aggregates there were some organic remains that were beginning to decompose,and also impregnative nodules of amorphous *** OM was evenly distributed among the aggregate fractions,the larger blocky peds had more specific surface,contained less decomposed OM and had a lower organic/mineral interphase than smaller crumb aggregates,which were also more *** carbon storage was affected primarily by the OM inputs in the surface *** order to store organic carbon over the mid- and long-term periods,the mechanisms favouring structuration through biological activity and creating small aggregates with intrapedal stable microporosities seemed to be the most effective.