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在Cunninghamia lanceolata种植园的海拔梯度上土壤有机碳和聚合物稳定性的变化

Xiaoqing Cao^1,2, Yuting Xu², Fei Wang^2,3

¹Anhui Provincial Key Laboratory of Forest Resources and Silviculture, Anhui Agricultural University, Hefei, 230036, China.

Scientific reports

|December 31, 2024

概括

在中国松树种植园中,土壤有机碳 (SOC) 和聚合物稳定性因高度而异. 土+粘土分量和活性碳池是保持山区土壤碳的关键.

科学领域:

林业林业林业林业林业
土壤科学土壤科学
生态生态学生态生态学

背景情况:

评估土壤有机碳 (SOC) 稳定性对于亚热带森林生态系统至关重要,特别是在气候变化下.
了解海拔如何影响土壤属性对于有效的土地管理至关重要.

研究的目的:

为了研究活性碳成分的空间变化,聚合物分布和稳定性,在中国树种植园沿着一个海拔梯度.
为了确定海拔和土壤层对SOC和聚合物稳定性的影响.

主要方法:

在一个海拔梯度 (7501150米) 上研究了中国树种植园. 在中国的达比山脉.
分析了土壤有机碳 (SOC) 分数,总分布和稳定性指标,如平均重量直径 (MWD) 和几何平均直径 (GMD).
检查的活性碳池包括易氧化碳 (EOC),有机颗粒碳 (POC),微生物生物质碳 (MBC) 和溶解有机碳 (DOC).

主要成果:

宏观聚合物占土壤部分的80%以上.
SOC,MWD和GMD显示了土壤表层 (0-10厘米) 的U形趋势,以及土壤深度 (10-50厘米) 的上升趋势.
易氧化碳 (EOC) 和有机颗粒碳 (POC) 随着海拔的提高而增加,而微生物生物质碳 (MBC) 和泥+粘土碳在850米处达到峰值.
石灰+粘土碳含量明显高于聚合物结合碳,并且与MWD有积极的相关性.

结论:

在中国树种植园中,海拔和土壤层显著影响SOC和总体稳定性.
通过泥+粘土分量和活性碳池的物理保护是该地区土壤碳保存的主要机制.
这些发现有助于更好地了解海拔对气候变化和森林生态系统碳循环的影响.

关键词:

昆宁搬到了兰塞洛塔种植园.总的分数是总的分数.总体稳定性总体稳定性升高梯度的梯度是指升高的梯度.土壤有机碳土壤有机碳

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