西安市农用地土壤有效硫空间分布及影响因素研究  

Study on spatial distribution of soil available sulfur and its influencing factors in farmland of Xi’an city

作　　者：吕爽[1] 蔡苗 孙喜军 李荃 缑巧红 张荣 LV Shuang;CAI Miao;SUN Xi-jun;LI Quan;GOU Qiao-hong;ZHANG Rong(Xi’an Agricultural Technology Extension Center,Xi’an Shaanxi 710061;Xi’an Lintong Agricultural Technology Extension Service Center,Xi’an Shaanxi 710600;Xi’an Gaoling District Agricultural Technology Extension Center,Xi’an Shaanxi 710200)

机构地区：[1]西安市农业技术推广中心,陕西西安710061 [2]西安市临潼区农技推广服务中心,陕西西安710600 [3]西安市高陵区农业技术推广中心,陕西西安710200

出　　处：《中国土壤与肥料》2024年第6期27-34,共8页Soil and Fertilizer Sciences in China

基　　金：2020年陕西省农业农村厅农业绿色生产发展项目(陕农计财[2020]24号)。

摘　　要：为研究西安市农用地土壤有效硫含量、空间分布以及影响因素,2020年在西安市各区县采集农用地0~20 cm土壤,调查采样点成土母质、地貌类型、土壤类型、海拔信息,测定土壤有效硫、有机质、pH值、全氮、有效磷、速效钾指标,最终剔除检测异常值后保留509个样点。应用描述性统计、相关性分析、方差分析、多重比较、地理信息系统研究了西安市农用地土壤有效硫含量的时空变异和影响因子,为西安市土壤硫素分区管理及合理施肥提供数据支撑。结果表明,西安市农用地土壤有效硫含量平均值为21.03 mg/kg,按照土壤有效硫含量分级标准,属于中等水平,变异系数达到81.09%,属于中度变异。土壤有效硫含量具有明显的空间分异,自西向东总体呈现“高—低—高—低”的变化趋势,含硫量低和中低的土壤面积合计占比为56.8%。土壤类型、成土母质、地貌类型均对土壤有效硫含量具有显著影响,其中以成土母质的影响最显著。土壤pH值与土壤有效硫含量呈极显著负相关,土壤有机质和全氮含量与土壤有效硫含量呈极显著正相关。针对部分农区土壤硫素缺乏现象,推荐使用含硫复合肥或者补施硫肥,降低作物缺硫风险。In order to study the spatial distribution and influencing factors of soil available sulfur in farmland of Xi’an city,soil sample(0-20 cm)was collected from various counties in Xi’an city in 2020,the parent material,geomorphic type,soil type and altitude information of the sampling points were investigated,and the available sulfur,organic matter,pH value,total nitrogen,available phosphorus and available potassium of the soil were measured.Finally,509 samples were retained after excluding data outliers.Descriptive statistics,correlation analysis,variance analysis,multiple comparison and geographic information system were used to study the spatial variation of soil available sulfur and its influencing factors,providing data support for the regional management of soil sulfur and rational fertilization in Xi’an city.The results showed that the average value of soil available sulfur content in Xi’an agricultural areas was 21.03 mg/kg,which belonged to the medium level according to the classification standard of soil available sulfur content,and the coefficient of variation reached 81.09%,which belonged to the medium variation.Soil available sulfur content showed obvious spatial differentiation from west to east,showing a trend of“high-low-high-low”.The total soil area of low and medium-low sulfur contents accounted for 56.8%.Soil type,parent material and geomorphic type all had significant effects on soil available sulfur content,among which the parent material had the most significant effect.Soil available sulfur content had significant negative correlations with pH value,and had significant positive correlations with soil organic matter and total nitrogen.On account of soil sulfur deficiency in some agricultural areas,sulfur compound fertilizer or supplemental sulfur fertilizer was recommended to reduce the risk of sulfur deficiency in crops.

关 键 词：有效硫 空间分布 影响因素 

分 类 号：S153.6[农业科学—土壤学]