摘要:本研究选用高粱（Sorghum bicolor（L.） Moench）为修复植物用于治理土壤锶污染，接种地球囊霉（Glomus geosporum），比较不同锶浓度（0、75、725、975 mg/kg）处理下，地球囊霉对高粱修复锶污染土壤的调控作用。结果表明：在所有锶处理下，接种地球囊霉的侵染率都高于50%。与无菌根处理相比，在75、725 mg/kg锶处理，接种地球囊霉的高粱的生物量、株高和根长都显著增加（P<0.05）。接种地球囊霉的高粱表现出显著的菌根依赖性（P<0.05）。其中最显著的是75 mg/kg处理，菌根依赖性为136.92%，并且在0-975 mg/kg锶处理中菌根依赖性都大于100%。地球囊霉侵染的高粱，叶片和根中的锶含量与无菌根处理组相比显著增加（P<0.05），接种菌根组的转运系数都高于与无菌根组。接种地球囊霉，土壤中的全磷含量和速效磷含量显著降低（P<0.05）。全磷减少了6.52%-18.77%，速效磷减少了12.38%-27.43%。接种AMF显著增加了土壤磷酸酶活性（P<0.05），与无菌根组相比，增加了19.67%-32.56%。综上所述，地球囊霉能够促进高粱对锶的富集能力和耐受性，在锶污染（75-725 mg/kg）时接种地球囊霉的效果最好。



Abstract:In this study, Glomus geosporum was inoculated under different strontium concentrations (0, 75, 725, and 975 mg/kg) to compare its regulatory effect on Sorghum bicolor (L.) Moench to repair strontium-polluted soil. The results showed the following:the mycorrhizal colonisation rates of G. geosporum were higher than 50% under all treatments. Compared with controls, the biomass, plant height, and root length of sorghum inoculated with G. geosporum significantly increased at 75 mg/kg (P<0.05). Inoculated sorghum showed significant mycorrhizal dependency (P<0.05). The mycorrhizal dependencies were the highest at 75 mg/kg (136.92%), and mycorrhizal dependence of 0-975 mg/kg was greater than 100%. Sorghum colonised by G. geosporum had significantly higher strontium content in the leaves and roots at 75 and 725 mg/kg, compared with that in the controls (P<0.05), and the translocation factors of the AMF group were higher than that of the non-AMF group. The concentrations of strontium in sorghum aboveground structures and roots 7increased by 86.05% and 30.18%, respectively. Both the total and available phosphorus content in the soil decreased significantly (P<0.05). Total phosphorus decreased by 6.52%-18.77%, and available phosphorus decreased by 12.38%-27.43%. Inoculation with G. geosporum significantly increased soil phosphatase activity (P<0.05), which increased by 19.67%-32.56%, compared with that in the non-AMF group. In summary, G. geosporum can promote the enrichment ability and tolerance of sorghum to strontium, and the effect of inoculation under strontium concentrations of 75-725 mg/kg is the most effective.





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