Glomalin accumulation in forest soils and their relating iron compounds

为阐明球囊素在日本森林土壤中的积累规律，本研究对两种森林（冬青和黑栎）土壤球囊素总量、土壤有机碳、有机氮和细根生物量的布拉德福德反应性土壤蛋白（BRSP）浓度进行了研究。这些参数在长柄冬青林中高于锯齿栎林。锯栎林土壤中BRSP和有机碳、氮的含量约为长柄冬青林的一半。BRSP浓度与有机碳、有机氮浓度相关。其中，长柄冬青森林土壤中BRSP对焦磷酸盐可提取铁浓度的增量速率高于锯齿栎林土壤。说明球囊素对长柄冬青林土壤有机质积累具有重要作用。

To clarify the glomalin accumulation in Japanese forest soils, concentrations of bradford reactive soil protein(BRSP) indicating total glomalin, soil organic carbon, organic nitrogen, fine root biomass were investigated in following two forests : an Ilex pedunculosa forest and a Quercus serrata forest. These parameters were higher in Ilex pedunculosa forest than in Quercus serrata forest. The concentration of BRSP and organic carbon and nitrogen in soils from Quercus serrata forest were approximately half those in the Ilex pedunculosa forest. The concentration of BRSP was related to concentrations of organic carbon, organic nitrogen. In particularly, the increment rate of BRSP to pyrophosphate extractable iron concentration at the Ilex pedunculosa forest soil was higher than that at Quercus serrata forest soil. These results suggest that glomalin has important role to soil organic matter accumulation in Ilex pedunculosa forest.