围栏封育对科尔沁沙地榆树疏林草原土壤理化性质的影响  

Effects of Fencing Enclosure on Soil Physicochemical Properties of Sparse-Elm Grassland in Horqin Sandy Land

作　　者：方书悦 叶翠玲 吕依静 樊俊言 孙德帅 李晓兰 Fang Shuyue;Ye Cuiling;Lyu Yijing;Fan Junyan;Sun Deshuai;Li Xiaolan(School of Resources and Environment,Yili Normal University,Yining 835000,Xinjiang,China;Institute of Resources and Ecology,Yili Normal University,Yining 835000,Xinjiang,China)

机构地区：[1]伊犁师范大学资源与环境学院,新疆伊宁835000 [2]伊犁师范大学资源与生态研究所,新疆伊宁835000

出　　处：《绿色科技》2025年第4期83-89,共7页Journal of Green Science and Technology

基　　金：新疆维吾尔自治区“天池英才”创新领军人才计划项目;内蒙古自治区青年科技英才项目(编号:NJYT22118);伊犁师范大学高层次人才项目(编号:2023RCYJ07)。

摘　　要：本文以科尔沁沙地榆树疏林草原土壤为研究对象,将围封不同年限的草地与放牧地的土壤理化性质进行比较研究,分析围封年限和土层对土壤指标的影响。结果表明:围封年限显著影响了土壤含水量、容重、孔隙度、电导率、有机碳、全氮、全磷、铵态氮、硝态氮和速效磷;不同土层显著影响了有机碳、全氮、全磷和硝态氮;二者的交互作用显著影响了土壤含水量、有机碳、全磷、硝态氮和速效磷。与放牧地比较,围封显著提高了有机碳、全氮含量,而显著降低了土壤含水量和硝态氮含量。在同一土层内,围封5年后显著提高了土壤孔隙度、土壤全磷和速效磷含量,而显著降低了土壤容重、电导率和铵态氮含量(P<0.05)。从围封的不同年限间及与放牧地中土壤理化指标的比较可以看出,围封对沙地榆树疏林草原土壤理化性质产生了不同程度的影响。In this paper,the soil of sparse-elm grassland in Horqin sandy land was taken as the research object.The soil physicochemical properties of grassland with different enclosure years and grazing grassland were compared and studied,and the influence of enclosure years and soil layer on soil index was analyzed.The results showed that the enclosure years significantly affected soil water content,bulk density,porosity,electrical conductivity,organic carbon,total nitrogen,total phosphorus,ammonium nitrogen,nitrate nitrogen and available phosphorus.Different soil layers significantly affected organic carbon,total nitrogen,total phosphorus and nitrate nitrogen.The interaction between enclosure years and soil layer significantly affected soil water content,organic carbon,total phosphorus,nitrate nitrogen and available phosphorus.Compared with grazing grassland,enclosure significantly increased the content of organic carbon and total nitrogen,and significantly reduced the content of soil water and nitrate nitrogen.In the same soil layer,soil porosity,soil total phosphorus and available phosphorus content were significantly increased after 5 years of enclosure,while soil bulk density,electrical conductivity and ammonium nitrogen content were significantly decreased(P<0.05).From the comparison of soil physicochemical indexes between different years of enclosure and grazing grassland,it could be seen that enclosure had different degrees of influence on soil physicochemical properties of sparse-elm grassland in sandy land.

关 键 词：围封 放牧 理化指标 显著性 

分 类 号：S728.3[农业科学—林木遗传育种]