耕作与栽培2025，Vol.45Issue(2)：53-61,9.
镉胁迫对田七叶土壤酶及细菌多样性的影响
Effects of Cadmium Stress on Soil Enzyme and Bacterial Diversity of Mesembryanthemum cordifolium L.F.
摘要
Abstract
In order to explore the effects of Cd stress on soil enzyme activity and bacterial diversity,Mesembryanthemum cordifolium L.F.was used as experimental material,and pot experiment was carried out to set up different concentration gradients of Cd solution for heavy metal stress.The results showed that the soil enzyme activity decreased with the increase of Cd concentration.Among them,S-ACP,UE and S-SC all reached the maximum under T5 treatment,and then gradually decreased with the increase of concentration,and the activity of S-CAT was significantly higher than that of ck treatment group with the increase of concentration and the highest under T10 treatment,with an increase of 36.87％.Compared with ck,the ACE index of T5-T15 showed a trend of increasing first and then decreasing,which was higher than that of ck treatment group.Chao index and Shannon index of T5-T15 increased by 31.08％-50.54％and 11.26％-12.80％,respectively.The relative abundance of the top 4 bacteria(Proteobacteria,Actinobacteria,Green Bay bacteria and Acidobacteria)at the level of phylum was 8.12％-33.34％,and the size was T10＞T15＞ck＞T5.Compared with ck treatment,T5 and T10 treatments significantly increased the relative abundance of Proteobacteria and decreased the relative abundance of Actinobacteria.Correlation analysis showed that catalase activity was significantly correlated with Chao index,Shannon index,NMDS1 index and NMDS2 index,and acid phosphatase,urease and sucrase were negatively correlated with NMDS1.In summary,with the increase of Cd concentration,the soil enzyme activities at T5 began to decrease,and when it exceeded 5 mg/kg,it may have adverse effects on plants.At the same time,under T5 treatment,the relative abundance of beneficial microbial communities such as Actinobacteria and Green Bay bacteria gradually decreased with the increase of Cd concentration,while the relative abun-dance of harmful microbial communities such as Proteobacteria gradually increased with the increase of Cd concentration,which may also have an impact on the leaves of Mesembryanthemum cordifolium L.F.关键词
田七叶/重金属胁迫/Cd/土壤酶/土壤微生物群落Key words
Mesembryanthemum cordifolium L.F./heavy metal stress/cadmium/soil enzyme/phytoedaphon分类
农业科技引用本文复制引用
高家丽,魏升华,项文溪,张应鸿,杨涛,贾青,安江勇..镉胁迫对田七叶土壤酶及细菌多样性的影响[J].耕作与栽培,2025,45(2):53-61,9.基金项目
贵州省科技支撑计划农业领域重点项目([2022]重点019-4号) （[2022]重点019-4号）
贵州省中药材现代产业技术体系建设(GZYCCYJSTX-02) （GZYCCYJSTX-02）
