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作 者:曾星 张华[1] ZENG Xing;ZHANG Hua(College of Geography Science,Liaoning Normal University,Dalian,Liaoning 116029,China)
机构地区:[1]辽宁师范大学地理科学学院,辽宁大连116029
出 处:《土壤》2023年第6期1354-1362,共9页Soils
基 金:辽宁省教育厅自然科学类基本科研项目(LJ2020019、LJKZ0971)资助。
摘 要:探究碧流河上游农田土壤性状指标现状和空间分布特征,为研究区耕地资源的可持续利用提供科学依据和数据支持。沿碧流河上游采集农田表层(0~20cm)土壤样品40份,运用地统计学和ArcGIS技术,对农田土壤性状:比重、粒径、电导率、含盐量、pH、有机质、土壤大量营养元素(N、P、K)含量和微量营养元素(Cr、Cu、Zn、Mn、Ba)含量的空间分布特征进行系统分析。结果表明:①农田土壤性状均属于中等空间变异,其中Zn元素含量的空间变异性最强(CV=59.58%),比重的空间变异性最弱(CV=2.61%),受外界干扰较小。②农田土壤性状之间关联性紧密,其中电导率与含盐量之间、pH与Cu和Mn元素含量之间、有机质与N和P元素含量之间、K元素含量与Ba元素含量之间、Cu元素含量与Zn和Mn元素含量之间、Zn元素含量与Mn元素含量之间呈显著正相关(P<0.01)。③农田土壤粒径存在强烈的空间自相关性,Cr、Cu元素含量空间自相关性最弱,其他土壤性状属于中等空间自相关。研究区农田土壤性状表现出显著的空间分布差异性。In order to explore the present situation and spatial distribution characteristics of farmland soil indexes and to provide scientific basis and data support for sustainable utilization of cultivated land resources in the upper reaches of Biliu River,40 soil samples(0–20 cm)were collected,soil properties including specific gravity,particle size composition,electrical conductivity,pH,the contents of salt,organic matter,macro-elements(N,P,K),micro-elements(Cr,Cu,Zn,Mn,Ba)were determined,and geostatistics and ArcGIS were used to analyze the characteristics and spatial distribution of soil properties.The results showed that the spatial variabilities of soil properties all were moderate,in which Zn was the strongest(CV=59.58%)and specific gravity was the weakest(CV=2.61%).There were close correlations between soil properties,in which significant positive correlations were found between electrical conductivity with salt,pH with Cu and Mn,organic matter with N and P,K with Ba,Cu with Zn and Mn,Zn with Mn(P<0.01).A strong spatial autocorrelation was found in particle size composition,the weakest spatial autocorrelation in Cr and Cu,while moderate spatial autocorrelation in other soil properties,which indicated significant differences in the spatial distributions among different soil properties in the study.
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