| 摘要: |
| 研究结合 GIS、地统计学及多元统计分析，对河源市和平县林地土壤肥力进行综合评价，绘
制林地土壤肥力等级空间分布图。结果如下：（1）共划分林地土壤肥力评价单元 2 510 个，评价单元最小
面积为 1.67 hm2
，最大面积为 2 014.82 hm2
，均值为 78.21 hm2
，和平县林地土壤共计 18.9 万 hm2
，达到
精细化评价水平。（2）主成分分析将 6 个土壤肥力指标提取为 2 个主成分，可反映和平县林地土壤全部
信息的 68%。主成分 1 以全氮（Total nitrogen，N）、容重（Capacitive weight）贡献大，主成分 2 以全钾
（Total potassium，K）、有机碳（Organic carbon）、pH、全磷（Total phosphorus，P）贡献大。（3）和平县
林地土壤肥力评价单元综合评价值 IFI 在 0.19 ~ 0.73 之间，根据综合评价值将肥力等级由低至高划为 1 至
10 级，和平县林地土壤肥力等级 5 级及以下等级面积占总面积达 52.4%，6 级及以上等级为 47.6%，3、 4、5、7、8 级占比超过 10%，分别为 12.44%、16.19%、10.69%、10.01%、14.04%。整体分布有西高东
低的特征，高等级肥力单元有向西部与北部集中的趋势。 |
| 关键词: GIS 地统计学 主成分分析 林地土壤肥力评价 评价单元 |
| 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) |
|
| Comprehensive Evaluation of Fertility Quality in Heping Forest Soil Based on GIS and Geostatistics |
|
QuYi, SunDongxiao, WeiDan, Zhanggeng
|
|
Guangdong Academy of Forestry,
|
| Abstract: |
| Soil fertility is the basis of land productivity, and a comprehensive evaluation of soil fertility
in woodland can provide an important reference for forestry production management. In this study, combined
with GIS, geostatistics and multivariate statistical analysis, a comprehensive evaluation of soil fertility in Heping
county, Heyuan city, and a spatial distribution map of soil fertility grades in the woodland were drawn. The results
are as follows: 1. A total of 2 510 soil fertility evaluation units in the forest land were divided, the minimum
area of the evaluation unit was 1.67 hectares, the maximum area was 2 014.82 hm2
, the average value was 78.21
hm2
, and the total amount of woodland soil in Heping county was 189 000 hectares, reaching the level of refined
evaluation. 2. The principal component analysis extracts 6 soil fertility indicators into 2 principal components,
which can reflect 68% of the total information of the woodland soil in Heping county. The main component 1
contributes greatly to N and bulk weight, and the main component 2 contributes greatly to K, organic carbon, pH
and P. 3. The comprehensive evaluation value of the soil fertility evaluation unit of Heping county forest land is between 0.19 and 0.73, and the fertility grade is classified from low to high to 10 according to the comprehensive
evaluation value, and the area of soil fertility grade 5 and below in Heping county accounts for 52.4% of the total
area, the grade 6 and above is 47.6%, and the grades 3, 4, 5, 7 and 8 account for more than 10%, respectively,
12.44%, 16.19%, 10.69%, 10.01% and 14.04%. The overall distribution has the characteristics of high west and
low east, and the high-grade fertility units tend to concentrate to the west and north. |
| Key words: GIS geostatistics PCA soil fertility evaluation evaluation unit |
