湖北省天门市农作物种植区土壤中硒富集影响因素

Soil Selenium Enrichment Factors of Crop Planting Areas in Tianmen,Hubei Province

对湖北天门主要农作物种植区土壤中全量硒和有效态硒的调查表明,土壤中全量硒主要受以下3个因素控制：1土壤有机质含量与土壤硒含量呈正相关关系;2土壤淋溶作用与土壤硒含量呈负相关关系;3土壤p H值在7.5~7.8之间时最有利于土壤中硒的富集。土壤有效态硒富集主要受控于4个因素：1土壤中全量硒与有效硒呈正相关关系;2土壤类型分类统计中,潮土最有利于有效硒富集;3通过土地利用现状调查发现水田最有利于土壤有效硒富集;4p H值对土壤有效态硒富集的影响无明显规律,中性环境略有利于提高土壤中有效态硒的比例。

Through the research of main crops in Hubei Tianmen planting soil total selenium and available effective state of selenium survey in main crops planting soil of Tianmen city, Hubei province, shows that, total selenium in soil is mainly controlled by the following three factors. The influential factors of soil total selenium enriched mainly in the following three factors control. First, soil organic matter content and soil selenium content are positively correlated. Second, soil leaching solution function and the content of Se in soil are negatively correlated. Third, soil pH value between 7.5 - 7.8 is most conducive to soil selenium enrichment. Soil available effective selenium enrichment is mainly controlled by 4 factors. First, the content of soil total selenium and available selenium are positively correlated. Second, statistical classification of soil types and fluvo aquie soil is most conducive to available effective selenium enrichment. Thrird,land use survey found that paddy field is most beneficial to soil enrichment of selenium. Fourth,pH value of soil of soil effective selenium enrichment effect has no obvious regularity of available selenium enrichment, and but neutral environment slightly favorable increaseimproves the proportion of the available effective state of selenium in soil slightly.