Abstract: To systematically evaluate the passivation and remediation efficiency，as well as the improvement of physicochemical properties and plant physiological metabolism of Cr and As contaminated soil in mine tailings ponds by the P.brevitarsis larvae frass sand，a greenhouse pot cultivation method was used. Cherry radish was selected as the test crop，and seven treatment levels were set up［insect feces sand was added at 0%（CK），10%（T1），20%（T2），40%（T3），50%（TN），80%（T4），and 100%（T5）of soil weight］to study its effects on soil physicochemical properties，soil Cr and As content，and soil enzyme activity. At the same time，its effect on photosynthetic indicators，heavy metal content in edible parts，and plant enzyme activity of cherry radish were analyzed.The results showed that with the increase of application rate of P.brevitarsis larvae frass sand，soil pH value，heavy metals Cr and As content showed a decreasing trend，while conductivity，organic matter content，available nitrogen content，available phosphorus content，soil urease activity，invertase activity，and catalase activity significantly increased（P<0. 05）.Cherry radish showed reduced absorption of Cr and As，improved photosynthetic indicators（relative chlorophyll content，leaf nitrogen content），and increased antioxidant enzyme（superoxide dismutase，peroxidase，catalase）activity. The redundancy analysis results showed that soil organic matter content was the core driving factor（with a contribution rate of 83.0%），indicating its central role in soil fertility.In summary，the P.brevitarsis larvae frass sand could enhance the adsorption capacity of soil heavy metals（Cr，As）by regulating soil physical and chemical properties，improving soil fertility and soil enzyme activity，and could effectively reduce the bioavailability of heavy metals，alleviating the toxicity to cherry radishes.Among them，adding insect feces sand at 80% of soil weight（T4 treatment）has a better effect on soil remediation and plant safety production.

Key words: Protaetia brevitarsis frass, Fertilizer efficiency, Heavy metal?contaminated soil, Enzyme activity, Cherry radish

摘要： 为系统评估白星花金龟幼虫虫粪砂对矿山尾矿库Cr、As污染土壤的钝化修复效能、理化特性改良作用，及其对植物生理代谢的调控作用，采用温室盆栽法，以樱桃萝卜为供试作物，设置7个处理梯度［虫粪砂分别按土壤质量的0%（CK）、10%（T1）、20%（T2）、40%（T3）、50%（TN）、80%（T4）及100%（T5）添加］，研究其对土壤理化性质，土壤Cr、As含量以及土壤酶活性的影响，同时分析其对樱桃萝卜光合指标、食用部位重金属含量、植物酶活性等的影响。结果表明，随着白星花金龟幼虫虫粪砂施用量的增加，土壤pH值，重金属Cr、As含量呈现下降趋势，电导率、有机质含量、速效氮含量、速效磷含量、土壤脲酶活性、土壤蔗糖酶活性、过氧化氢酶活性显著提高（P<0.05）；樱桃萝卜对Cr、As的吸收降低，光合指标（叶绿素相对含量值、叶面氮含量）得到改善，抗氧化酶（超氧化物歧化酶、过氧化物酶、过氧化氢酶）活性得到提升；冗余分析结果显示，土壤有机质含量为核心驱动因子（贡献率83.0%），表明其在土壤肥力中具有核心作用。综上，白星花金龟幼虫虫粪砂通过调节土壤理化性质、提升肥力及土壤酶活性，增强土壤重金属（Cr、As）的吸附能力，并可有效降低重金属生物有效性，从而缓解其对樱桃萝卜的毒害。其中，以虫粪砂按土壤质量的80%添加（T4处理）对土壤修复与植物安全生产的效果最优。

关键词: 白星花金龟虫粪, 肥效, 重金属污染土壤, 酶活性, 樱桃萝卜