| 摘要: |
| 为了科学管理中亚热带季风气候带的土壤养分, 保护土壤生态环境, 实现土壤可持续利用,
以韶关市乐昌市森林土壤为研究对象, 随机布点、 专题布点和林分布点相结合采集 165 个土壤样点, 检测
土壤 pH、 有机碳和大量元素含量, 并运用相关性分析和克里金插值法探究不同土壤层各指标之间的相关
性及空间分布格局。 相关性分析结果显示, 土壤 pH 与有机碳含量呈负相关关系, 有机碳与全氮 (TN)、
全磷 (TP) 含量呈正相关, 全氮与全磷含量也为正相关, 其中有机碳与全氮在不同土壤深度始终保持强
相关性 (P<0. 01)。 空间分布图显示, 每个指标在不同土壤深度的空间分布格局相似, 高值和低值的分布
区域也相近。 结果表明, 乐昌市森林土壤表层大多呈强酸或酸性, pH 随着土壤深度加深而升高; 表层有
机碳含量丰富, 均在中等及以上水平, 随着土壤深度加深而递减; 表层全氮含量丰富, 均在中等及以上
水平, 随着土壤深度加深递减; 表层全磷含量匮乏, 均在中等及以下水平, 随着土壤深度加深递增; 表
层全钾 (TK) 含量丰富, 绝大多数区域处于中等及以上水平。 |
| 关键词: 中亚热带季风气候带 土壤 pH 有机碳 大量元素 空间分布 |
| DOI： |
| 分类号: |
| 基金项目:广东省林业科技创新项目 ( 2023KJCX021), 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) |
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| Spatial Distribution of Forest Soil pH and Nutrients in Mid-subtropical Monsoon Climate Zone———A Case Study of Lechang City |
|
yeyang1, liyingying2, zhangliangbiao3, zhaozhiming2, qiye2, dingxiaogang1
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1.Guangdong Academy of Forestry;2.Guangdong Academy of Forestry Sciences;3.Guangzhou Yonghe Forestry Co., Ltd
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| Abstract: |
| To scientifically manage the soil nutrients in the mid-subtropical monsoon climate zone, protect
the soil ecological environment, and achieve the sustainable utilization of soil, the forest soil in Lechang, Shaoguan city was selected as the research object, and 165 soil samples were collected by random distribution, specific distribution and forest distribution methods. The soil pH, organic carbon content, and macroelements content (TN, TP, TK) were detected, and the correlation and spatial distribution pattern of each index in differ-ent soil layers were explored by correlation analysis and the Kriging interpolation method. The results of correlation analysis showed that soil pH value was negatively correlated with organic carbon content, organic carbon
was positively correlated with total nitrogen and total phosphorus content, and total nitrogen was also positively
correlated with total phosphorus content. Among them, organic carbon and total nitrogen always maintained a
strong correlation at different soil depths (P<0. 01). The spatial distribution map indicates that the spatial distribution pattern of each index in different soil depths is similar, and the distribution areas of high and low values
are also similar. The results showed that the surface layer of forest soil in Lechang city was mostly strong acid or
acidic, and the pH increased with the deepening of soil depth. The organic carbon content in the surface layer is
abundant, classified as medium or above levels, and similarly decreases with soil depth. The total nitrogen content in the surface layer is also rich, consistently at medium or above levels, and likewise decreases with soil
depth. In contrast, the total phosphorus content in the surface layer is deficient, categorized as medium or below, and increases with soil depth. The total potassium content in the surface layer is abundant, with the majority of regions classified as medium or above. |
| Key words: mid -subtropical monsoon climate zone soil pH organic carbon macroelements spatial distribution |
