陕西农田土壤硫分布特征及其与土壤性质的关系

采集陕西省6个主要气候类型区农田的耕层土壤样品305个,测定其全硫和有效硫含量。结果表明,陕西省土壤全硫含量变幅为33~769 m g/kg,平均值为360 m g/kg,有效硫含量4.6~157.3 m g/kg之间,平均值29.3 m g/kg。全省不同气候类型区全硫含量顺序为:渭北旱塬区>陕北丘陵区>关中灌区>陕北风沙滩地>陕南川道区>秦巴浅山丘陵区,有效硫含量顺序为:陕南川道区>陕北风沙滩地>秦巴浅山丘陵区>渭北旱塬区>关中灌区>陕北丘陵区。土壤全硫和有效硫之间、全硫与有机质之间、有效硫与有机质之间有显著正相关关系,全硫与土壤pH之间有负相关关系。

The Characteristics of Sulphur Distribution in Soil and Relationships with Soil Properties of Shaanxi

305 field soil samples were collected from 6 main areas of Shaanxi and analyzed for soil total S and available S.The result indicated that content of total S and available S in these soils ranged from 33 to 769 mg/kg(av.360 mg/kg) and from 4.6 to 157.3 mg/kg(av29.3 mg/kg),respectively.The total S content order in areas is: Weibei dryland>Shaanbei hill>Guanzhon plain>Shaanbei sand and wind area>Shaannan plain>Qinba hill.The order of the soil available S content in areas is: Shaannan plain> Shaanbei sand and wind area> Qinba hill > Weibei dryland> Guanzhong plain> Shaanbei hill.Total S and available S,total S and organic matter,available S and organic matter are positive at the 0.01 level;While total S is negatively correlated with pH of soil.