露天矿排土场接种AMF对3种植物根系发育与土壤团聚体稳定性的影响  

Effects of AMF Inoculation on Root and Aggregate Stability of Three Plant Species in Open Pit Dump

作　　者：全民[1] 杜昕鹏 毕银丽[2,3] Quan Min;Du Xinpeng;Bi Yinli(Shenhua Group Zhungeer Energy Co.,Ltd.,Ordos,Inner Mongolia 010300,China;Institute of Mine Ecological Restoration,China University of Mining and Technology(Beijing),Beijing 100083,China;Institute of Ecological Environment Restoration in Mine Area of West China,Xi′an University of Science and Technology,Xi′an 710054,China)

机构地区：[1]神华准格尔能源有限责任公司,内蒙古鄂尔多斯010300 [2]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083 [3]西安科技大学西部矿山生态修复研究院,西安710054

出　　处：《水土保持研究》2024年第3期187-194,共8页Research of Soil and Water Conservation

基　　金：国家重点研发计划项目(2022YFF1303303);国家自然科学基金(51974326)。

摘　　要：[目的]探究丛枝菌根真菌(AMF)对植物根系和土壤团聚体稳定性的影响规律,为露天矿排土场生态修复提供理论基础。[方法]对复垦3年的紫穗槐、沙棘、柠条3种植物的对照和接菌样地的土壤理化性质、土壤酶活性、植物根系形态、土壤团聚体稳定性等指标进行采样和测定,并进行相关性分析。[结果]3种植物接菌处理能够显著提高植物根系的平均直径,接菌样地是对照的1.33~2.24倍;在压实土壤条件下,菌丝可能一定程度上代替植物细根系为植物提供水分和养分,使紫穗槐和沙棘样地接菌降低了根系的总根长。接菌显著提高了土壤酶活性,增加了土壤有机质含量,碱性磷酸酶活性最高提高了335.62%,脲酶活性最高提高了44.73%,易提取球囊霉素含量最高提高了82.56%,土壤有机质含量最高提高了64.74%。接菌通过增加土壤有机质含量,提高土壤酶活性等途径,显著增强了土壤团聚体的稳定性,平均重量直径提高了24.14%~34.29%,团聚体破坏率降低了18.25%~24.35%。[结论]露天矿排土场接种AMF能够显著提高土壤生物活性,提高养分含量,促进植物根系发育,从而提高土壤团聚体的稳定性。[Objective]The aims of this study are to explore the effect of arbuscular mycorrhizal fungi AMF on the stability of plant roots and soil aggregates,and to provide a theoretical basis for the ecological restoration of open pit dump.[Methods]Soil physicochemical properties,soil enzyme activities,plant root morphology,soil aggregate stability and other indexes of 3 species of Amorpha fruticosa,Hippophae rhamnoides,Caragana korshinskii were sampled and measured in the control and inoculated plots.Correlation analysis was conducted for each index.[Results]The average root diameter of the three plants could be significantly increased by inoculation,and the inoculation plot was 1.33~2.24 times that of the control.Under the condition of compacted soil,mycelia to some extent provided water and nutrients for plants instead of fine roots,which reduced the total root length of root system.Inoculation significantly increased soil enzyme activity and soil organic matter content,alkaline phosphatase activity increased by 335.62%,urease activity increased by 44.73%,extractable balloon amycin content increased by 82.56%,soil organic matter content increased by 64.74%.By increasing soil organic matter content and soil enzyme activity,inoculation significantly enhanced the stability of soil aggregates,increased the average weight diameter by 24.14%~34.29%,and reduced the failure rate of aggregates by 18.25%~24.35%.[Conclusion]Inoculation of AMF in open pit dump can significantly improve soil biological activity,increase nutrient content,promote plant root development,and thus improve the stability of soil aggregates.

关 键 词：新成排土场 团聚体稳定性 根系形态特征 土壤酶活性 

分 类 号：S156[农业科学—土壤学]