摘要
在南充市西河流域沿岸采集不同土地利用方式下的土壤样品,分析土壤粒度组成和磁化率特性。结果表明,研究区土壤粉砂含量较高,平均值为66.84%;黏粒和砂粒含量较低,平均值分别为15.17%和17.74%,说明不同土地利用方式下土壤粒度组成存在差异。土壤样品的低频磁化率平均值为14.16×10-8 m3/kg,频率磁化率平均值为2.56%,不同土地利用方式下土壤磁化率存在差异,但总体上较低的磁化率表明研究区土壤未受污染。土壤磁化率与土壤粉砂含量成正相关,与砂粒含量成负相关,揭示出研究区土壤磁化率受人类活动干扰较少的特征,表明磁化率与粒度的相关性可作为反映土壤是否受到人类活动影响的环境指标。
Soil samples under different land use patterns were collected along the Xihe River Basin in Nanchong City to analyze soil particle sizecomposition and magnetic susceptibility characteristics.The results showed that the soil silt content was relatively high,with an average value of66.84%,while the content of clay and sand were relatively low,with an average value of 15.17% and 17.74%,respectively.It indicated there weredifferences in soil particle size composition under different land use patterns.In addition,the mean of low frequency magnetic susceptibility was 14.16×10-8 m3∕kg,while that of frequency magnetic susceptibility was 2.56%.There were differences in soil magnetic susceptibility under different land usepatterns,but the low magnetic susceptibility showed that the soil in the area was not polluted.The magnetic susceptibility was positively related to thecontent of silt,while negatively to that of sandy particles,showing the soils were less affected by human activities.It indicated that the correlationbetween magnetic susceptibility and particle size could be used as an environmental indicator to reflect whether the soil was affected by humanactivities.
作者
熊泳
王海方
张渊
文星跃
XIONGYong;WANGHai-fang;ZHANGYuan;WEN Xing-yue(College of Landand Resources,China West Normal University,Nanchong Sichuan 637002;School of Geoscience,Chengdu University of Technology)
出处
《现代农业科技》
2018年第22期200-202,205,共4页
Modern Agricultural Science and Technology
基金
国家自然科学基金项目(41671220)
西华师范大学英才项目(17YC126)
关键词
土壤粒度
土壤磁化率
影响因素
西河流域
四川南充
soil particle size
soil magnetic susceptibility
influencing factor
Xihe River Basin
Nanchong Sichuan
