丛枝菌根对重金属污染土壤中玉米生长及养分吸收的影响

发布时间：2018-11-20 19:47

【摘要】：为揭示在被重金属Pb、Zn、Cd复合污染的土壤中添加菌根对玉米生物量及营养元素吸收的影响,进行了盆栽试验。结果表明:(1)接种菌根Glomus mosseae、Glomus intraradices的玉米,地上部生物量受菌根的影响不显著,但根部的生物量分别增长了13.16%和34.21%;根部侵染率达24.14%和25.41%。(2)接种菌根Glomus mosseae的玉米,其地上部及根部磷浓度与对照组相比提高不显著;而接种菌根Glomus intraradices的玉米,其地上部及根部磷浓度与对照组相比分别增长了16.66%和10.70%;接种菌根Glomus intraradices的玉米,根部吸收的磷有向地上部集中的趋势。(3)接种菌根Glomus mosseae、Glomus intraradices的玉米,与对照组相比,地上部锰浓度增长不显著,根部锰浓度分别大幅增长了44.93%和53.04%;地上部铁浓度小幅下降,根部铁浓度分别增长为4.15%和37.80%,说明菌根Glomus intraradices能够促进玉米根部吸收Fe;地上部钙浓度分别增长了36.97%和18.50%,根部钙浓度仅小幅增长,根部吸收的钙明显向地上部集中。
[Abstract]:In order to reveal the effect of mycorrhizal addition on maize biomass and nutrient uptake in soil contaminated by heavy metal Pb,Zn,Cd, pot experiment was carried out. The results showed that: (1) in maize inoculated with mycorrhizal Glomus mosseae,Glomus intraradices, the aboveground biomass was not significantly affected by mycorrhizal biomass, but the root biomass increased by 13.16% and 34.21% respectively; The rate of root infection was 24.14% and 25.41% respectively. (2) P concentrations in shoot and root of maize inoculated with mycorrhizal Glomus mosseae were not significantly higher than those in control group. The P concentrations in shoot and root of maize inoculated with mycorrhizal Glomus intraradices increased by 16.66% and 10.70%, respectively. In maize inoculated with mycorrhizal Glomus intraradices, the phosphorus absorbed by the roots tended to be concentrated in the shoot. (3) compared with the control group, the concentration of manganese in the aboveground part of the maize inoculated with mycorrhizal Glomus mosseae,Glomus intraradices did not increase significantly. The root manganese concentration increased by 44.93% and 53.04% respectively. The above ground iron concentration decreased slightly, and the root iron concentration increased to 4.15% and 37.80%, respectively, indicating that mycorrhizal Glomus intraradices could promote the absorption of Fe; in maize roots. The aboveground calcium concentration increased by 36.97% and 18.50% respectively, and the root calcium concentration increased only slightly, and the calcium absorbed by the root increased obviously to the aboveground part.
【作者单位】：黑龙江科技大学环境与化工学院;
【基金】：黑龙江省自然科学基金项目(编号:D2015006)
【分类号】：X53;S513

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