基于综合等级划分的土地质量地球化学评价OA
Geochemical Evaluation of Land Quality Based on Comprehensive Classification Method:A Case Study of Yonghe County in Shanxi Province
[目的]土地资源合理开发利用是目前开展农业工作的重中之重.以山西省永和县为研究区,采用"网格+图斑"的模式布设,开展1∶5万土地质量地球化学评价.[方法]采集表层土壤样品、大气干湿沉降物样品和灌溉水样品对土壤养分、环境和土地综合质量进行评价,同时对研究区土壤酸碱度进行分级分析并作出因地制宜的改良性建议,此外,将土壤酸碱度与土壤速效钾的相关性进行研究.[结果]结果表明:N和有机质呈现严重缺乏的水平,土壤养分等级总体呈现较缺乏、中等,较丰富三个等级,土壤环境质量为大面积清洁,只有两小块呈现轻微污染水平,土壤质量地球化学综合等级共分为四等:一等、二等、三等和四等,分别占全区总面积的0.003%、36.7%、63.2%和0.1%;大气干湿沉降物和灌溉水对土壤环境质量下降影响不是很明显,综合土地质量为中等水平;研究区土壤pH值变化范围在7.48～9.48之间,土壤碱性化问题严重,碱性土壤面积占研究区总面积的73.55%,强碱性土壤占到了总面积26.45%,所以土壤碱性化问题需要因地制宜的解决,同时也可以种植一些喜碱性作物;研究区速效钾含量处于丰富水平,土壤pH值与土壤速效钾呈现显著负相关,相关系数为-0.121,土壤pH对土壤速效钾含量影响明显.该研究成果可为研究区科学进行农业结构调整、实施可持续发展利用土地资源提供借鉴,而且对丰富和完善土地质量地球化学评价体系也具有重要意义.
[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.
任大陆;杨峻懿;苗洪运;冯志强;裴元睿;唐臣燕;乔林;王米;相轩
山西省地质勘查局二一三地质队有限公司,山西 临汾山东省地质矿产勘查开发局第一地质大队(山东省第一地质矿产勘查院),山东 济南山西省地质勘查局二一三地质队有限公司,山西 临汾太原理工大学 地球科学与测绘工程学院,山西 太原||山西省地质调查院有限公司,山西 太原||战略性矿产资源成矿作用与评价山西省重点实验室,山西 太原太原理工大学 地球科学与测绘工程学院,山西 太原山西蓝德凯尔土地规划设计咨询有限公司,山西 太原山西省地质勘查局二一三地质队有限公司,山西 临汾山西省地质勘查局二一三地质队有限公司,山西 临汾山西省地质勘查局二一三地质队有限公司,山西 临汾
天文与地球科学
土壤pH值土地质量土壤地球化学评价速效钾
soil pHland qualitysoilgeochemical evaluationfast-acting potassium
《太原理工大学学报》 2026 (1)
28-43,16
山西省青年科学研究项目(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)山西省地质勘查基金项目(晋地发[2020]32号、2020-00164-G155-C54)山西省自然科学基金(2019L0126,2019L0054)山西省科技厅自然科学基金(201701D221022)山西省自然资源厅地勘基金项目(晋地发[2020]32号)
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