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在~（２１０）Ｐｂ_（ｅｘ）和~（１３７）Ｃｓ计年基础上，对采自洱海深水湖区沉积物柱芯进行了Ｃ_（ｉｎｏｒｇ）（无机碳）、Ｃ_（ｏｒｇ）（有机碳）、Ｎ、Ｓ 含量和 Ｐ形态分析。 Ｃ_（ｏｒｇ）垂直剖面具“沉降－降解－堆积”三阶段分布特征，沉降和堆积通量分别为 １２．７ ｇ／（ｍ~２· ａ） 和 ７． ２０ ｇ／（ｍ~２· ａ）；降解速率常数为 ０． ０１７ ａ~（－１），寄宿时间为 ４０ ａ。 Ｎ的垂直分布与 Ｃ_（ｏｒｇ）相似，沉降和堆积通量分别 为２．６２ ｇ／（ｍ~２·ａ）和 １．２１ｇ／（ｍ~２· ａ）；降解速率常数为 Ｃ_（ｏｒｇ）的 １．４倍，寄宿时间仅为 Ｃ_（ｏｒｇ）的 ３／４。 Ｓ在沉积物柱芯 中显示出较大波动，沉降和堆积通量分别为 ０． ７３ ｇ／（ ｍ~２· ａ）和 １． ２３ ｇ／（ｍ~２· ａ）。 Ｐ_（ｏｒｇ）（有机磷）、Ｐ_（ｔｏｔａｌ）（总磷）和 Ｐ_（Ｃａ）（钙 磷）呈同步变化，降解图示与Ｃ_（ｏｒｇ）相似；Ｐ_（ｏｒｇ）的转化导致Ｐ_（ｉｎｏｒｇ）增高。 Ｃ_（ｏｒｇ）及原子比Ｃ／Ｎ随沉积物深度的变化趋势一 致，有机质选择性分解不明显；堆积阶段Ｃ／Ｎ比为６．８，与海洋Ｒｅｄｉｆｉｅｌｄ值相近，指示沉积物有机质主要来自陆源 植物。Ｃ／Ｓ比?
Based on the dating of ~ (210) Pb_ (ex) and ~ (137) Cs, the sediment core collected from the Erhai Lake Basin was analyzed for inorgan, Cgor, N, S content and P form analysis. The vertical section of C_ (org) has three stages of “sedimentation - degradation - accumulation”, and the sedimentation and accumulation fluxes are 12.7 g / (m ~ 2 · a) and 7, respectively. 20 g / (m ~ 2 · a); the degradation rate constant is zero. 017 a ~ (-1), boarding time is 40 a. The vertical distribution of N is similar to that of Cg (org), and the sedimentation and accumulation fluxes are 2.62 g / (m 2 · a) and 1.21 g / (m 2 · a), respectively. The degradation rate constant is C org ) 1.4 times, boarding time is only C_ (org) 3/4. S showed a larger fluctuation in the sediment core, and the sedimentation and accumulation fluxes were 0 respectively. 73 g / (m ~ 2 · a) and 1. 23 g / (m 2 · a). The P_ (org), P_ (total) (P) and P_ (Ca) (Ca and P) show a synchronous change, the degradation pattern is similar to C_ (org); P_ (org) ) Increased. The C_ (org) and atomic ratio C / N have the same trend with the depth of sediment, and the selective decomposition of organic matter is insignificant. The C / N ratio of deposition stage is 6.8, which is similar to that of the marine Redifield, indicating that the organic matter mainly comes from the terrestrial plant. C / S ratio?