烤烟盆栽试验表明，天然含硒土种烟后，ＮＨ３．Ｈ２Ｏ－Ｓｅ和ＨＣＩ－Ｓｅ及土壤总硒量明显减少，ＮＨ３．Ｈ２Ｏ－Ｓｅ和ＨＣＩ－Ｓｅ是有效硒和固定态硒的来源，土壤施硒种烟后，土壤各形态硒及全硒含量均与施硒量呈极显著的正相关，无效态硒占一半以上，有效硒只占２０％左右，说明土壤具有很强的固硒能力，土壤施硒具有一定的后效。 Flue-cured tobacco pot experiments showed that natural selenium soil after planting tobacco, NH3. H2O-Se and HCI-Se and soil total selenium decreased significantly, NH3. H2O-Se and HCI-Se were the sources of available selenium and fixed selenium. After the selenium was applied to soil, the contents of various forms of selenium and total selenium in soil were significantly positively correlated with the amount of selenium application, and the invalid selenium accounted for more than half , Effective selenium accounts for only about 20%, indicating that the soil has a strong ability to selenium, soil selenium has a certain effect.