中文摘要：

福雷斯特土壤碳(C) 是全球 C 周期的一个重要部件。然而，由的机制树种类影响土壤器官的 C (SOC ) 水池作文和矿化作用糟糕被理解。在土壤 C 上理解树种类的效果骑车，我们估计了全部、易变、不顺从的 SOC 水池，由 ¹³ 在四单一经营种植园的 C 原子磁性的回声光谱学，和 SOC 矿化作用。在表面的易变、不顺从的 SOC 水池(0-10 ? 厘米) 并且深(40-60 ? 厘米) 四个森林里的土壤包含了类似的内容。相反，这些 SOC 水池在表面下的土壤展出了差别(从 10 ～ 20 ? 厘米并且从 20 ～ 40 ? 厘米) 。SOC 的烷基 C 和 O 烷基 C 紧张比在 Cunninghamia lanceolata 和 Pinus massoniana 森林在 Schima superba 和 Michelia macclurei 森林是更高的。在表面土壤， S。superba 和 M。macclurei 森林比的展出了更高的 SOC 矿化作用率 P。massoniana 和 C。lanceolata 森林。在 C ₆₀ 和易变的 SOC 之间的直线的斜坡在 C ₆₀ 和全部的 SOC 之间是比那陡峭的。我们的结果建议根影响了 SOC 水池的作文。易变的 SOC 水池也比全部的 SOC 水池在很大程度上影响了 SOC 矿化作用。

英文摘要：

Forest soil carbon （C） is an important compo- nent of the global C cycle. However, the mechanism by which tree species influence soil organic C （SOC） pool composition and mineralization is poorly understood. To understand the effect of tree species on soil C cycling, we assessed total, labile, and recalcitrant SOC pools, SOC chemical composition by 13C nuclear magnetic resonance spectroscopy, and SOC mineralization in four monoculture plantations. Labile and recalcitrant SOC pools in surface （0-10 cm） and deep （40-60 cm） soils in the four forests contained similar content. In contrast, these SOC pools exhibited differences in the subsurface soil （from 10 to 20 cm and from 20 to 40 cm）. The alkyl C and O-alkyl C intensities of SOC were higher in Schima superba and Michelia macclurei forests than in Cunninghamia lanceolata and Pinus massoniana forests. In surface soil, S. superba and M. macclurei forests exhibited higher SOC mineralization rates than did P. massoniana and C.lanceolata forests. The slope of the straight line between C60 and labile SOC was steeper than that between C60 and total SOC. Our results suggest that roots affected the composition of SOC pools. Labile SOC pools also affected SOC mineralization to a greater extent than total SOC pools.