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为了解丰城市生态硒谷土壤的供硒能力及其影响因素,通过实地调查采样,对丰城生态硒谷96个0~20 cm耕层土壤样品中硒含量、形态分布、重金属含量及部分土壤理化性质进行研究,并探讨与土壤硒有效性的关系。结果表明,该地区土壤全硒质量比变幅(541~831μg/kg)达到富硒土壤标准。易被生物利用的水溶态硒和可交换态硒质量比较少且在不同土壤样品中差异较大,变幅分别为10.30~38.23μg/kg和10.68~38.45μg/kg,且与土壤全硒有一定的相关性。土壤全硒、不同土地利用方式和土壤理化性质均对土壤硒的有效性产生影响,其中稻田土壤的供硒能力大于旱地,全P和速效P均与水溶态硒呈极显著正相关,在土壤硒有效性一定的条件下,全硒含量较高的土壤能够向作物提供较多的有效硒。
In order to understand the selenium supply capacity and its influencing factors in Fengcheng ecological selenium valley soils, selenium content, morphological distribution, heavy metal content and some soil contents in 96 0-20 cm soil layers of Fengcheng eco-selenium valley Physical and chemical properties of the study, and explore the relationship with soil availability of selenium. The results showed that the soil total selenium ratio (541 ~ 831μg / kg) in this area reached the standard of selenium-enriched soil. The biologically available water soluble selenium and exchangeable selenium have relatively low mass and vary significantly in different soil samples with amplitude ranging from 10.30 to 38.23 μg / kg and 10.68 to 38.45 μg / kg, respectively, A certain degree of relevance. Soil total selenium, different land use patterns and soil physical and chemical properties had an impact on the availability of selenium. Soil available for selenium in paddy soil was higher than dry land, total P and available P were significantly and positively correlated with water-soluble selenium, Under certain conditions of selenium availability, soils with higher total selenium content can provide more effective selenium to crops.