| 辽宁省不同气候条件下樟子松成熟林土壤有机碳空间特征分析 |
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| 引用本文： | 姜吉文,李永化,雷泽勇.辽宁省不同气候条件下樟子松成熟林土壤有机碳空间特征分析[J].土壤通报,2021,52(1):42-46. |
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| 作者姓名： | 姜吉文 李永化 雷泽勇 |
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| 作者单位： | 1.辽宁师范大学地理科学学院，辽宁 大连 116029 |
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| 摘 要： | 森林土壤有机碳含量（SOC）在地区和土层间存在差异，然而林木生长对SOC的变化的影响沿降水梯度的变化机理尚不明确。本研究以辽宁省不同降水区樟子松成熟林为研究对象，分析了不同地区不同土层SOC的差异以及林地SOC与对照样地SOC比值（SOCR）在不同地区和土层间的差异。结果表明:SOC和SOCR受地区、土层及其交互作用的显著影响。林地SOC显著高于对照样地，湿润和半湿润地区SOC高于半干旱地区，且SOC随土层深度增加而降低。湿润地区SOCR显著高于半湿润和半干旱地区。因此，营建樟子松人工林能够显著提高SOC，而且在湿润地区栽植樟子松林对土壤有机碳的提升能力高于半湿润和半干旱地区，这种现象在表层尤为显著。
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| 关 键 词： | 樟子松 土壤有机碳 累积 气候 |
| 收稿时间： | 2020-03-04 |
Spatial Characteristics of Soil Organic Carbon in Matured Pinus Sylvestris var. Mongolica Forest under Different Climatic Conditions |
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| Institution: | 1.College of Geographical Sciences, Liaoning Normal University, Dalian 116029, Liaoning, China2.College of Environmental Science and Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China |
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| Abstract: | The content of soil organic carbon (SOC) in forest lands are different between regions and soil depths. However, the effect of tree growth on the change of SOC along the precipitation gradient was still unclear. Based on the matured forest of Pinus sylvestris var. mongolica in different precipitation areas of Liaoning Province, we analyzed the difference of SOC and their ratio (SOCR) in different soil depths and areas between forest land and control land. The results showed that SOC and SOCR were significantly affected by area, soil depth and their interactions. The content of SOC in the forest land was significantly greater than that in the control land, and the content of SOC in the humid and semi-humid areas was greater than that in the semi-arid areas. The content of SOC was decreased with the increase of soil depths. The SOCR in the humid area was significantly higher than that in the semi-humid and semi-arid area. Therefore, the cultivation of Pinus sylvestris in the plantation could significantly improve SOC, especially in the surface soil. |
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