摘要
研究土壤养分元素的丰缺状况,对于指导农业生产、改善种植结构、因地制宜科学施肥具有重要参考意义。本文以聊城市典型农业区堂邑镇为研究对象,选择代表性耕地采集84份浅层土壤样品并测试了15种养分指标,基于GIS及地统计学分析方法,揭示了各地球化学元素的空间分布规律,并开展了土壤养分地球化学单指标及综合评价。研究结果表明:①堂邑镇耕地土壤P、CaO呈较丰富—丰富水平;K_(2)O呈中等—较丰富水平;S含量分布不均,总体达到较丰富及以上水平,局部发生过剩;N和有机质含量较缺乏;微量元素总体含量适中。②区内富硒土壤面积约2.98 km^(2),Se含量达(0.49~2.03)×10^(-6),富硒土地占比约4.76%。③区内土壤养分地球化学综合等级以较丰富(二等)和中等(三等)级别为主,面积占比分别为54.11%和40.47%,较为适宜农业生产。本次成果全面掌握了研究区耕地土壤养分状况并发现富硒土地资源,为指导土地资源开发利用、发展特色农业提供了基础地球化学依据。
Assessing the abundance and deficiency of soil nutrient elements holds critical referential significance for guiding agricultural production,improving the planting structure,and implementing location-specific scientific fertilization.This study investigated Tangyi Town,a typical agricultural area in Liaocheng City.First,this study tested 15 nutrient indicators in 84 topsoil samples from representative cultivated land.Second,using the geographic information system(GIS)and geostatistical analysis,this study revealed the spatial distribution patterns of various geochemical elements.Third,this study conducted single-indicator and comprehensive assessments of soil nutrient geochemistry.The results show that the soils from cultivated land in Tangyi Town exhibited relatively abundant to abundant P and CaO contents,and moderate to relatively abundant K_(2)O content.Their S content displayed overall relatively abundant to a higher level and a non-uniform distribution,with local excess observed.Additionally,they manifested relatively deficient N and organic matter contents and generally moderate trace element content.This study identified a Se-rich soil area of approximately 2.98 km^(2),representing about 4.76%of the total cultivated land area,with Se content ranging from 0.49×10^(-6) to 2.03×10^(-6).The comprehensive geochemical grades of soil nutrients in the study area are predominantly of gradesⅡ(relatively abundant)andⅢ(moderate),covering areas of 54.11%and 40.47%,respectively,indicating favorable conditions for agricultural production.This study ascertained the soil nutrient status of cultivated land in the study area and identified Se-rich land resources,providing fundamental geochemical data for guiding the development and utilization of land resources and developing distinctive agriculture.
作者
张文强
李常锁
刘金鑫
程诗悦
滕跃
李根林
ZHANG Wen-Qiang;LI Chang-Suo;LIU Jin-Xin;CHENG Shi-Yue;TENG Yue;LI Gen-Lin(Shandong Provincial Geo-mineral Engineering Exploration Institute(No.801 Hydrogeology and Engineering Geology Institute,Shandong Exploration Bureau of Geology and Mineral Resources),Ji'nan 250014,China;Shandong Engineering Research Center for Environmental Protection and Remediation on Groundwater,Ji'nan 250014,China;Shandong Hydrogeology Engineering Geology and Environment Geology Corporation,Ji'nan 250014,China)
出处
《物探与化探》
2025年第5期1232-1242,共11页
Geophysical and Geochemical Exploration
基金
山东省地质勘查项目(鲁勘字(2021)46号)。
关键词
表层土壤
养分元素
地球化学
聊城市
topsoil
nutrient element
geochemistry
Liaocheng City
