| 摘要: |
| 为探究西江下游典型流域森林土壤全氮含量的空间分布规律，以该流域 0~100 cm 深度的 5 层
土壤为研究对象，基于普通克里金空间插值法和 GIS 平台，对森林土壤全氮在该流域的分布情况进行预
测。结果表明：（1）全氮在 0~100 cm 中含量的平均值为 664.51 mg/kg，在 D1~D5 层均值分别为 802.31
mg/kg、670.82 mg/kg、654.07 mg/kg、606.94 mg/kg 和 588.40 mg/kg，从上至下呈下降趋势；（2）各土层
间全氮含量差异性结果显示，D1 与其他各层均具有显著差异性，D2 与 D4、D5 差异性显著，其他土层之
间无显著差异性；（3）空间分布预测结果显示：土壤全氮含量在水平方向基本呈南高北低的趋势，从垂
直分布情况来看，D1 层土壤全氮含量显著高于其他层，随后基本呈先下降后上升趋势。西江下游典型流
域森林土壤全氮含量呈南高北低趋势，并随着土层深度增加呈下降趋势。 |
| 关键词: 西江 森林土壤 全氮 空间分布 |
| DOI： |
| 投稿时间：2022-09-27修订日期：2022-09-27 |
| 基金项目:林地土壤调查 |
|
| Spatial Distribution of Soil Total Nitrogen in Typical Lower Xijiang River Basin |
| Wangyang,HE Chaoyin,KANG Jian,ZHANG Zhongrui,Qiye,Jiangyao |
| (Guangdong Academy of Forestry) |
| Abstract: |
| In order to explore the spatial distribution of forest soil total nitrogen content in the typical
lower Xijiang River basin, the distribution of forest soil total nitrogen in this watershed was predicted based on
the general Kriging spatial interpolation method and GIS platform, taking five layers of soil with 0-100cm depth
as the research object.The results showed that: (1) The average content of total nitrogen in 0-100cm was 664.51
mg/kg, and in D1-D5 layers was 802.31 mg/kg, 670.82 mg/kg, 654.07 mg/kg, 606.94 mg/kg and 588.40 mg/kg,
respectively. A downward trend from top to bottom. (2) The difference of total nitrogen content among soil layers
showed that D1 was significantly different from other layers, D2 was significantly different from D4 and D5, but
there was no significant difference among other soil layers.(3) Spatial distribution prediction results showed that soil
total nitrogen content in the horizontal direction was higher in the south than in the north. From the perspective of
vertical distribution, soil total nitrogen content in D1 layer was significantly higher than that in other layers, and then
basically decreased first and then increased. The total nitrogen content of forest soil in the typical lower of Xijiang
River basin was higher in the south and lower in the north, and decreased with the increase of soil depth. |
| Key words: Xijiang River forest soil total nitrogen spatial distribution |
