宁夏土壤质地类型及剖面构型的空间分布规律
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(1.中国农业科学院农业资源与农业区划研究所,北京 100081;2.农业农村部耕地质量监测保护中心,北京 100125;3.宁夏农林科学院,宁夏 银川 750002)

作者简介:

周雷(1997-),硕士研究生,研究方向为土壤地理学。E-mail:1301107182@qq.com。

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基金项目:宁夏耕地可持续利用与农田生产力提升技术研究与示范项目、科技基础性工作专项项目(2014FY110200A07)。


Spatial distribution patterns of soil texture types and profile configurations in Ningxia
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(1.Institute of Agricultural Resourcesand Regional Planning,ChineseAcademy of Agricultural Sciences,Beijing100081;2.Land Quality Monitoring and ProtectionCenter,Ministry of Agricultureand Rural Affairs,Beijing100125;3.Ningxia Academy of Agricultural and ForestrySciences,Yinchuan Ningxia750002)

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    摘要:

    土壤质地是土壤的自然物理属性,在土壤的形成过程中受母质、地貌、土地利用类型和土壤侵蚀等多种因素的影响,土体呈现出不同的质地类型及剖面构型。为了解宁夏回族自治区土壤的质地类型及剖面构型的分布规律,在宁夏挖掘100 个代表性土壤剖面,通过划分土壤层次,共采集分层(A+B)土壤样品209 个,测试其颗粒组成,按照美国土壤质地分类标准划分土壤质地,结果表明:(1)宁夏的质地类型共有粉壤土(SIL)、砂壤土(SL)、壤土(L)、粉黏壤土(SICL)、黏壤土(CL)、壤砂土(LS)、砂土(S)、粉土(SI)、粉黏土(SIC)和黏土(C)10 种类型。A 和B 层均是以SIL 为主,SL 和L 次之。(2)土壤剖面构型共有12 种类型,以SIL-SIL 为优势构型(占38%),SL-SL 次之(占17%)。在所有剖面构型中均质型占71%,上松下紧型占13%,上紧下松型占16%。(3)SIL-SIL 是宁夏地区最典型的土壤剖面构型,主要分布于宁夏南部地区,L-L 和L-SIL 主要分布于北部和中部地区;SL-SL 和SL-SIL 主要分布于中部地区;SICL-SICL 和SICL-L 主要分布于宁夏北部地区。(4)典型土壤中灰钙土的优势构型为SL-SL 和SIL-SIL;黄绵土的优势构型为SIL-SIL;灌淤土的优势构型为SICL-SICL;灰褐土的优势构型为SIL-SIL 和L-SIL;潮土的优势构型为SIL-SIL 和SICL-SICL;黑垆土的优势构型为SIL-SIL。宁夏主要土壤一般有均质型和非均质型土体构型,但黑垆土所处环境稳定,土体构型均为均质型。(5)研究区土壤剖面构型的分布主要受到地貌和海拔的影响,而北部地区由于引黄灌淤,土体构型黏粒含量升高,以SICL-SICL、SICL-L 和SIL-SIL 为主要构型。

    Abstract:

    Soil texture is anatural physical property ofsoil,which is influenced by various factors such asparentmaterial,topography,land usetypes,and soil erosion during the soil formation process. The soil exhibits different texture profile configurations. In order to understand the profile configurations and their distribution patterns in the Ningxia Hui AutonomousRegion,100 representative soil profiles wereexcavated,and atotal of 209layered(A+B)soil samples were collected by dividing the soil layers and testing their particle composition. The soil texture was classified according to the USA soil texture classification standard. The results are asfollows:(1)The soil types in Ningxia include 10types:siltyloam(SIL), sandyloam(SL),loam(L),silty clayloam(SICL),clayloam(CL),loamysand(LS),sandy(S),silt(SI),siltyclay(SIC)andclay(C). SIL is the dominant texturetype in both the A and B layers,followed by SL and L.(2)There are12 types of soil profileconfigurations,with SIL -SIL being the dominantconfiguration(38%),followed by SL-SL(17%). Homogenous configurations accountfor 71% of all profile types,while loose above and compact below configurations account for13%,and compact above and loose below configurations account for16%.(3)SIL-SIL is the most typicalsoil profile configuration in Ningxia,mainly distributed in the southern region. L-L and L-SIL are mainly distributed in the northern and central regions. SL-SL and SL-SIL are mainly distributed in the central region. SICL-SICL and SICL-L aremainly distributed in the northernregion.(4)The dominant profile configurations for typical soils are SL-SL and SIL-SIL for calcareoussoils,SIL-SIL for loesssoils,SICL -SICL for alluvialsoils,SIL -SIL and L-SIL for gray-brownsoils, SIL-SIL and SICL-SICL for tidalsoils,and SIL -SIL for black soils. Among the major soil types inNingxia,black soils have astable environment,and their profile configurations are homogenous. Except for alluvial and tidal soils with SICL-SICL as the dominantconfiguration,most other soils in the study area are dominated by SIL-SIL or SL-SLconfigurations,matchingthe localclimate.(5)The distribution of soil profile configurations in the study area is mainly influenced by topography andaltitude. In the northernregion,the high clay contentin the soil is due to the deposition from the YellowRiver,resulting in SICL-SICL,SICL-L and SIL-SIL as the main configurations.

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周雷,曲潇琳,周涛,马常宝,李建兵,龙怀玉,徐爱国,张认连.宁夏土壤质地类型及剖面构型的空间分布规律[J].中国土壤与肥料,2024,(7):1-9.

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  • 收稿日期:2023-08-24
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  • 录用日期:2023-09-22
  • 在线发布日期: 2024-09-30
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