青海门源县中部地区表层土壤养分地球化学评价  

Geochemical evaluation of surface soil nutrients in the central area of Menyuan County,Qinghai Province

作　　者：喻光建 刘庆宇 韩思琪 马瑛 黄强 YU Guangjian;LIU Qingyu;HAN Siqi;MA Ying;HUANG Qiang(The Fifth Geological Exploration Institute of Qinghai Province,Xining 810099,Qinghai,China;Qinghai Province Selenium Rich Resource Utilization Engineering Technology Research Center,Xining 810099,Qinghai,China)

机构地区：[1]青海省第五地质勘查院,青海西宁810099 [2]青海省富硒资源利用工程技术研究中心,青海西宁810099

出　　处：《矿产勘查》2024年第3期486-498,共13页Mineral Exploration

基　　金：青海省省级财政资金地质勘查项目(2021074012jc003、2022012019jc013);中国地质调查局国家公益性地质调查专项(DD20160319-07)联合资助。

摘　　要：门源是青海省主要的农业县,也是南祁连地区最大的油菜籽和青稞产出县,土壤肥沃,工业污染水平低,是国家重点绿色农业示范基地,但暂未开展过系统的土壤养分调查评价工作。为了进一步了解门源县中部表层土壤养分元素丰缺及分布特点,对3972个表层土壤样品进行pH、有机质、氮、磷、钾和土壤中微量养分元素含量分析测试,开展土壤养分地球化学单指标及养分综合评价。结果表明:门源县中部地区土壤以碱性为主,土壤大量养分元素有机质、氮、磷、钾及微量元素锰、硼、钼、锌、铜、钴、钒含量等级均以丰富、较丰富为主,分布规律较一致,根据表层土壤养分地球化学综合等级划分,在门源县中部地区表层土壤养分丰富和较丰富地区占97.9%,中等—较缺乏地区占2.1%,无养分缺乏地区。研究成果可为门源县中部土地利用规划和保护提供科学依据。Menyuan is a major agricultural county in Qinghai Province and also the largest producer of rapeseed and barley in the South Qilian region.The soil is fertile and the industrial pollution level is low.It is a national key green agriculture demonstration base.Menyuan County has not yet carried out systematic soil nutrient investigation and evaluation work.In order to further understand the abundance and distribution characteristics of nutrient elements in the surface soil of central Menyuan County,3972 surface soil samples were analyzed and tested for pH,organic matter,nitrogen,phosphorus,potassium,and trace nutrient element content in the soil.Soil nutrient geochemical single indicators and comprehensive nutrient evaluation were carried out.The results show that the soil in the central region of Menyuan County is mainly alkaline,with abundant and relatively abundant levels of nutrients such as organic matter,nitrogen,phosphorus,potassium,and trace elements such as manganese,boron,molybdenum,zinc,copper,cobalt,and vanadium.The distribution pattern is consistent.According to the comprehensive geochemical classification of surface soil nutrients,97.9% of the surface soil in the central region of Menyuan County is nutrient rich and relatively rich,Areas with moderate to relatively low nutrient deficiencies account for 2.1%,while areas without nutrient deficiencies.The research results can provide scientific basis for land use planning and protection in the central part of Menyuan County.

关 键 词：表层土壤 地球化学 土壤养分评价 门源县中部 青海省 

分 类 号：P595[天文地球—地球化学]