| 摘要: |
| 为探究北江流域森林土壤有机碳的含量和空间分布格局，制定合理的森林经营规划，推动该区
域的碳汇研究。基于北江流域内的森林分布现状，采用专题样点布设和空间随机样点方法，布设 174 个
样点并进行不同层次（0~20、20~40、40~60 和 60~80 cm）的土壤取样，使用重铬酸钾外加热法测定土壤
有机碳含量，运用克里金空间插值法分析土壤有机碳含量空间分布特征。结果表明：北江流域森林土壤
有机碳含量在 0~80 cm 土层上的变化范围为 9.81~18.91 g · kg-1，变异系数范围为 41.80%~52.85%，属中等
变异程度；在垂直方向上的分布随土层深度加深逐渐降低，呈现明显的表聚现象；北江流域土壤有机碳
含量总体分布格局为中部高、西高东低、南高北低。总体而言，北江流域表层土壤的有机碳含量较丰富，
碳养分充足。 |
| 关键词: 有机碳含量 空间分布 垂直方向 森林生态系统 |
| DOI： |
| 分类号: |
| 基金项目:广东省省级财政专项资金“林地土壤调查”(2020年-2022年)；广东省林业科技计划项目(2019-07)；广东省省级生态公益林效益补偿资金省统筹经费项目(2022年)。第一作者：许窕孜(1998—),女,在读硕士,研究方向为森林培育学,E-mail：986812759@qq.com。通讯作者：丁晓纲(1978—),男,教授级高级工程师,主要从事森林理学研究,E-mail: 27267152@qq.com。 ,2 LU Qifeng1,2 KANG Jian1,3 HE Qian2 DING Xiaogang1* |
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| Characteristics and Distribution Pattern of Forest Soil Carbon Nutrients in Beijiang River Basin |
|
xutiaozi1, Luqifeng1, Kangjian1, Heqian2, Dingxiaogang1
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1.guangdong academy of foresty;2.College of Forestry and Landscape Architecture, South China Agricultural University
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| Abstract: |
| In order to explore the content and spatial distribution pattern of forest soil organic carbon in
the Beijiang River Basin, formulate a reasonable forest management plan, and promote the research on carbon
sinks in the region. Based on the status quo of forest distribution in the Beijiang River Basin, 174 sample points
were set up using thematic sampling points and spatial random sampling points, and soil sampling at different
levels (0~20, 20~40, 40~60, and 60~80cm) was carried out. Potassium dichromate external heating method was
used to determine soil organic carbon content, and Kriging spatial interpolation method was used to analyze the
spatial distribution characteristics of soil organic carbon content. The results showed that the variation range of
forest soil organic carbon content in the 0~80 cm soil layer in the Beijiang River Basin was 9.81-18.91 g · kg-1,
and the variation coefficient ranged from 41.80 % to 52.85 %, which was a moderate degree of variation; The
distribution of soil organic carbon gradually decreased with the deepening of soil depth, showing an obvious surface aggregation phenomenon; the overall distribution pattern of soil organic carbon content in the Beijiang
River Basin was high in the middle, high in the west and low in the east, high in the south and low in the north.
In general, the organic carbon content of the topsoil in the Beijiang River Basin is rich, and carbon nutrients are
sufficient. |
| Key words: organic carbon content spatial distribution vertical orientation forest ecosystem |
