太原理工大学学报2026，Vol.57Issue(1)：28-43,16.DOI:10.16355/j.tyut.1007-9432.20240704
基于综合等级划分的土地质量地球化学评价
Geochemical Evaluation of Land Quality Based on Comprehensive Classification Method:A Case Study of Yonghe County in Shanxi Province
摘要
Abstract
[Purposes]The rational development and utilization of land resources are the most important in agricultural work at present.In this paper,Yonghe County in Shanxi Province is taken as the study area,and the mode of"grid+patch"is adopted to carry out 1∶50,000 land quality geo-chemical evaluation.[Methods]Surface soil samples,atmospheric dry and wet sedimentation sam-ples,and irrigation water samples were collected to evaluate soil nutrients,environment,and compre-hensive land quality.At the same time,the soil pH in the study area was graded and analyzed,and some suggestions for improving the soil pH were made according to local conditions.In addition,the correlation between soil pH and soil available potassium was studied.[Results]The results show that N and organic matter are seriously deficient,and the soil nutrient levels are generally deficient,medium,and rich.The soil environmental quality is clean in a large area,and only two small areas are slightly polluted.The comprehensive geochemical level of soil quality is divided into four levels:First class,second class,third class,and forth class,accounting for 0.003%,36.7%,63.2%,and 0.1%of the total area of the district,respectively.The effects of atmospheric dry and wet sediments and irriga-tion water on soil environmental quality are not obvious,and the comprehensive land quality belongs to medium level.The pH value of soil in the study area varies from 7.48 to 9.48,and the problem of soil alkalinity is serious.The area of alkaline soil accounts for 73.55%of the total area of the study area,and the area of strong alkaline soil accounts for 26.45%of the total area.Therefore,the problem of soil alkalinity needs to be solved according to local conditions,and some alkaline crops can also be planted.The available potassium content in the study area is at an abundant level,and the soil pH value is sig-nificantly negatively correlated with the soil available potassium content,and the correlation coeffi-cient is-0.121.The soil pH has an obvious effect on the soil available potassium content.The results of this study can provide reference for the scientific adjustment of agricultural structure and the imple-mentation of sustainable development and utilization of land resources in the study area,and have im-portant significance for enriching and improving the geochemical evaluation system of land quality.关键词
土壤pH值/土地质量/土壤/地球化学评价/速效钾Key words
soil pH/land quality/soil/geochemical evaluation/fast-acting potassium分类
天文与地球科学引用本文复制引用
任大陆,杨峻懿,苗洪运,冯志强,裴元睿,唐臣燕,乔林,王米,相轩..基于综合等级划分的土地质量地球化学评价[J].太原理工大学学报,2026,57(1):28-43,16.基金项目
山西省青年科学研究项目(202303021222385) （202303021222385）
山西省地质勘查基金项目(山西省永和县 1∶5万地球化学土地质量评估:0632-1911FW1L2054-20) （山西省永和县 1∶5万地球化学土地质量评估:0632-1911FW1L2054-20）
山西省地质勘查基金项目(晋地发[2020]32号、2020-00164-G155-C54) （晋地发[2020]32号、2020-00164-G155-C54）
山西省自然科学基金(2019L0126,2019L0054) （2019L0126,2019L0054）
山西省科技厅自然科学基金(201701D221022) （201701D221022）
山西省自然资源厅地勘基金项目(晋地发[2020]32号) （晋地发[2020]32号）
