土壤中硒的形态分布及有效态研究

Study on the Form Distribution of Seleniumin Soils and Its Available States

对３种不同类型土壤中硒的形态分布和有效硒的提取进行了研究。并做了原土硒和外加硒形态转化对照试验。研究结果表明，土壤硒的形态分布受土壤性质、组成和ｐＨ值等的影响，可为改良缺硒土壤和提高土壤硒的有效性提供依据。作物盆栽试验表明，土壤有效硒的ＮａＨＣＯ３溶液浸提法可以作为评价土壤对作物有效态硒的指标。

In this paper a study is made on the selenic form distribution in three categories of soil and the extraction of available seleniumAnd a control test is made between the form change of selenium in raw soils and that of selenium added in raw soilsThe results show that the form distribution of selenium in soils is affected by the properties of soil,its composition,pH and others,thereby,providing a basis for improving the soils lack of selenium and its availabilityPot experiments with a crop show that extracting method of NaHCO3 solution may be regarded as an index for appraising available selenium in soil