科尔沁沙地不同生态系统土壤钾素分布特征分析  

Analysis on soil K distribution characteristics of different ecosystems in Horqin sandy land

作　　者：雷泽勇 陈伟 王巍凝 LEI Zeyong;CHEN Wei;WANG Weining(College of Environmental Science and Engineering,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]辽宁工程技术大学环境科学与工程学院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报(自然科学版)》2024年第6期79-85,共7页Journal of Liaoning Technical University (Natural Science)

基　　金：国家重点研发计划项目(2022YFF1302505-02);国家自然科学基金项目(31570709)。

摘　　要：为探究沙地不同生态系统土壤钾素的分布特征,采用农业化学常规方法与单因素方差分析法,分析科尔沁沙地森林、农田、草地和裸地生态系统土壤的全钾、速效钾含量。研究结果表明:土壤速效钾含量均随土层深度的增加逐渐减少,0~10 cm土层土壤速效钾含量从春季至秋季逐渐减少,森林土壤速效钾素含量最大;森林幼龄林林分生长可促进土壤钾素的积累,过熟龄林林分生长会抑制土壤钾素的积累;与裸地相比,农田、草地土壤全钾含量的最大值分别提高了61.82%、51.71%;随着植物的生长,森林、农田和草地生态系统土壤的钾素含量逐渐减少,裸地土壤的钾素含量随时间无明显变化。研究结果为沙地退化生态系统的恢复与治理提供理论依据。In order to explore the distribution characteristics of soil potassium in different ecosystems of sandy land,the total potassium and available potassium contents of forest,farmland,grassland and bare land ecosystems in Horqin sandy land were analyzed by conventional agricultural chemistry method and one-way analysis of variance.The research results show that the soil available potassium content gradually decreases with the increase of soil depth,and the soil available potassium content in the 0-10 cm soil layer gradually decreases from spring to autumn,and the forest soil available potassium contentss the largest.The growth of young forest stands can promote the accumulation of soil potassium,while the growth of overmature forest stands will inhibit the accumulation of soil potassium.Compared with the bare land,the maximum total potassium content of farmland and grassland increase by 61.82%and 51.71%,respectively.With the growth of plants,the potassium content in the soil of forest,farmland and grassland ecosystem gradually decrease,and the potassium content of bare soil do not change significantly with time.The results of this study provide a theoretical basis for the restoration and management of degraded ecosystems in sandy land.

关 键 词：沙地 土壤 生态系统 土壤全钾 土壤速效钾 

分 类 号：S365[农业科学—作物栽培与耕作技术]