| 摘要: |
| 研究在清远市针阔混交林地进行 0~80 cm 土壤采样，分析测试土壤 TN 含量，运用 Arc GIS 技
术，揭示清远市针阔混交林地土壤 TN 的空间分布格局特征。结果表明：清远市针阔混交林地土壤 D1，
0~20 cm 土壤层 TN 含量为 0.28~4.07 g/kg，平均值为 1.31 g/kg；D2 土壤层 TN 含量为 0.26~3.86 g/kg，
平均值为 1.20 g/kg；D3 土壤层 TN 含量为 0.27~4.41 g/kg，平均值为 1.13 g/kg；D4 土壤层 TN 含量为
0.29~3.96 g/kg，平均值为 1.16 g/kg。土壤氮元素含量在垂直空间上的分布格局分析结果表明，氮元素含
量在 D1 土壤层最高，在 D1~D3 土壤层随着土壤深度的增加，氮元素含量逐渐下降，D4 土壤层有略微的
上升趋势。清远市针阔混交林地土壤 TN 含量在水平空间分布上有较大的差异，高值区域主要分布在清远
市针阔混交林地的中部、东部，还有部分零散分布。北部、东南部区域的 TN 含量最低，整个清远市针阔
混交林地土壤 TN 含量呈中部高，四周低的分布特征。 |
| 关键词: 针阔混交林 森林土壤 全氮 空间分布 |
| DOI： |
| 分类号: |
| 基金项目:广东省生态林业建设项目“林地土壤调查”，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。 |
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| Spatial Distribution Characteristics of Soil Nitrogen Content in A Coniferous and Broadleaf Mixed Forest in Qingyuan City, Guangdong Province |
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zouzuyou1, dingxiaogang1, kang jian1, li yingying1, yu fei1, zhu hangyong1, su yan2
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1.Guangdong?forestry?science?research?institute;2.College of Forestry and Landscape Architecture, South China Agricultural University
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| Abstract: |
| The soil TN content was analyzed and tested by sampling the soil of coniferous and broad~leaved
mixed woodland in Qingyuan city (0-80 cm), and the spatial distribution pattern of soil TN in coniferous and
broad~leaved mixed woodland in Qingyuan city was revealed by using Arc GIS technology. The results showed
that TN content in D1 soil layer was 0.28-4.07 g/kg, with an average value of 1.31 g/kg. TN content in D2 soil
layer ranged from 0.26 to 3.86 g/kg, with an average of 1.20 g/kg. TN content in D3 soil layer ranged from 0.27
to 4.41 g/kg, with an average of 1.13 g/kg. TN content in D4 soil layer ranged from 0.29 to 3.96 g/kg, with an average of 1.16 g/kg. The analysis of the distribution pattern of soil nitrogen content in the vertical space showed
that the nitrogen content was the highest in the D1 soil layer, and decreased gradually in the D1-D3 soil layer
with the increase of soil depth, and then increased slightly in the D4 soil layer. The soil total nitrogen content of
mixed coniferous and broad-leaved forests in Qingyuan city was different in horizontal spatial distribution, and
the high value areas were mainly distributed in the middle and east of mixed coniferous and broad-leaved forests
in Qingyuan city, and some scattered areas. The total nitrogen content in the northern and southeastern regions
was the lowest, and the total nitrogen content in the mixed coniferous and broad-leaved forests in Qingyuan city
showed the distribution characteristics of high in the middle and gradually decreasing in the surrounding areas. |
| Key words: theropencedrymion forest soil total nitrogen spatial distribution |
