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。
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.
作者
亓琳
李艳玲
向璐
赵威
王晓凌
QI Lin;LI Yanling;XIANG Lu;ZHAO Wei;WANG Xiaoling(Agricultural College,Henan University of Science and Technology,Luoyang 471023,China;Luoyang Key Laboratory of Symbiotic Microorganism and Green Development,Luoyang 471023,China;State Key Laboratory of Urban and Regional Ecology,Research Centre for Eco-environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)
出处
《生态学报》
CAS
CSCD
北大核心
2020年第2期648-656,共9页
Acta Ecologica Sinica
基金
河南省科技攻关项目(182102110256)
河南科技大学学科提升振兴A计划项目(13660001)
国家自然科学青年基金(31601984)
关键词
锶
丛枝菌根真菌
高粱
植物修复
strontium
arbuscular mycorrhizal fungi
Sorghum bicolor(L.)Moench
phytoremediation
