Selenium-rich soil conditioner containing arbuscular mycorrhizal fungi, preparation method and use method

The selenium-rich soil conditioner provided by the invention is prepared from the following substances in percentage by mass: 25 to 35 parts of quicklime, 10 to 20 parts of nano silicon fertilizer, 15 to 20 parts of organic matters, 5 to 15 parts of magnesium oxide, 10 to 20 parts of ferrous sulfate, 20 to 30 parts of arbuscular mycorrhizal fungi, 10 to 13 parts of rhizobium, 5 to 10 parts of nitrogen-fixing bacteria, 10 to 15 parts of bacillus licheniformis and 5 to 10 parts of sodium selenite. The selenium-rich soil conditioner provided by the invention can increase the selenium content of soil and can remarkably reduce the cadmium content of the soil, the use method is simple, the operability is high, the economic benefit is obvious after use, and the selenium-rich soil conditioner has important significance for preventing and treating polluted soil in a high-cadmium area and guaranteeing grain safety. 本申请提供的富硒土壤调理剂及制备方法，包括：以下质量百分比的物质，过生石灰25～35份，纳米硅肥10～20份，有机质15～20份，氧化镁5～15份，硫酸亚铁10～20份，丛枝菌根真菌20～30份，根瘤菌10～1