Abstract: This study screened native fungi with high cadmium tolerance and removal performance from soil and plants contaminated with heavy metals in wheat fields，and produced solid fermentation remediation agents. Then it conducted wheat safety testing in healthy soil and investigated the effects of remediation agents on wheat growth and cadmium absorption under in‐situ heavy metal pollution conditions.The results showed that four functional fungi（M6，M10，M7，M3）with tolerance of up to 600 μmol/L Cd²⁺concentration and high cadmium removal rate in liquid culture medium containing 50 mg/L Cd²⁺were isolated and screened，with removal rates of 99.7%，79.3%，64.1%，and 62.8%，respectively.They were identified as Fusarium sp.，Trichoderma harzianum，Alternaria sp. ，and Chaetomium sp..In wheat safety testing，only M6 was found to inhibit the emergence rate and biomass of wheat. Under in‐situ heavy metal contaminated soil，the addition of M3，M7，and M10 significantly increased the fresh weight （22.0%—43.7%）and dry weight（15.7%—64.4%）of wheat，meanwhile significantly reducing the accumulation of Cd in the wheat root（37.2%—53.4%）.Among them，M7 treatment had the best effect.In summary，Chaetomium sp.M7 could promote the growth of wheat seedlings under cadmium stress and reduce cadmium accumulation，which could be used for soil heavy metal pollution control.

Key words: Wheat, Fungi, Heavy metal, Cadmium, Microbial remediation

摘要： 从镉污染小麦田土壤和植株中筛选耐镉（Cd）、去除镉性能较优的本土真菌，并制作固体发酵物修复剂，在健康土壤中进行小麦安全性检测，探究原位重金属污染条件下修复剂对小麦生长和镉吸收的影响。结果表明，共分离筛选出4株耐受程度高达600 μmol/L Cd²⁺浓度、在含Cd²⁺质量浓度为50 mg/L的液体培养基中去镉率较高的功能真菌（M6、M10、M7、M3），去除率分别为99.7%、79.3%、64.1%、62.8%，经鉴定分别为镰刀菌属（Fusarium sp.）、哈茨木霉（Trichoderma harzianum）、毛壳属（Chaetomium sp.）和链格孢属（Alternaria sp.）。小麦安全性检测中，仅处理M6抑制小麦的出苗率和生物量。原位重金属污染土壤下，添加M3、M7和M10显著增加小麦的鲜质量（22.0%~43.7%）、干质量（15.7%~64.4%），显著降低小麦根系对Cd的积累（37.2%~53.4%），其中，M7处理效果最佳。综上，毛壳属M7可以促进小麦幼苗在镉胁迫下的生长并降低镉积累，具有用于土壤重金属污染治理的潜力。

关键词: 小麦, 真菌, 重金属, 镉, 微生物修复