河北省土壤硫含量、形态与分布
The contents, forms and distribution of sulfur in soils of Hebei
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摘要: 对河北省主要土壤类型耕层硫含量进行了分析测定。结果表明 ,河北省土壤全硫平均含量为 250.1mg/kg(50～940mg/kg)。土壤全硫平均含量以沼泽土最高 ,灰色森林土最低 ;土壤有效硫平均含量为 46.1mg/kg ,以沼泽土最高 ,红粘土和栗褐土最低。土壤硫主要以有机态存在 ,占全硫含量的 81.6% ;无机态硫占 18.4%。按土类划分土壤无机硫含量最高的是沼泽土 ,灰色森林土最低 ;土壤有机硫含量也以沼泽土最高 ,灰色森林土最低。土壤全硫含量主要受土壤有机质含量、阳离子代换量和土壤碳酸钙含量的影响。根据土壤硫供应水平计算 ,全省约有20.4%的土壤缺硫 ,北部缺硫面积较大 ,南部缺硫面积较小。根据土壤有效硫含量多寡 ,可把全省土壤硫含量划分为极缺乏区、缺乏区、中等区、丰富区及极丰富区 5类Abstract: The study showed that the average content of total sulfur in Hebei soils was 250 1mg/kg and the variance range was 50～940mg/kg The highest one was swamp soil and the lowest one was gray soil if it was expressed in soil types The average content of available sulfur in Hebei soils was 46.1mg/kg The highest one was swamp soil and the lowest one was chestnut drab soil Organic sulfur was the main form in Hebei soils It was the 81.6%, the other was inorganic sulfur The highest content of inorganic sulfur in soil type was swamp soil (101.4mg/kg) and the lowest content of it in soil type was gray forest soil (7.2mg/kg) The same thing was took place for organic sulfur The main effective factors for soil total sulfur were the contents of soil organic, CEC and soil calcium carbonate About 20.4% soil was deficiency of sulfur The sulfur deficiency soil types were chestnut drab soil, chestnut soil, meadow soil and brow earth Also the sulfur deficient soil in north of Hebei was more serious than that in south of Hebei According to the content of soil available sulfur, five areas were divided in Hebei
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