| 张金秀,苏琳,蒋明,李明锐,王灿,何永美,陈建军,湛方栋.丛枝菌根真菌减少污染土壤Cd淋溶流失的效应研究[J].农业环境科学学报,2022,41(9):1936-1943. |
| 丛枝菌根真菌减少污染土壤Cd淋溶流失的效应研究 |
| Effects of arbuscular mycorrhizal fungi on Cd leaching loss in contaminated soil and its preliminary mechanism |
| 投稿时间：2021-12-08 |
| DOI：10.11654/jaes.2021-1424 |
| 中文关键词: 丛枝菌根真菌(AMF) 球囊霉素相关蛋白 壤中流 Cd淋溶 土壤团粒组成 |
| 英文关键词: arbuscular mycorrhizal fungi (AMF) glomalin related soil protein interflow Cd leaching soil aggregate composition |
| 基金项目:国家自然科学基金项目（41661056，42177381）；云南省重点研发项目（2019BC001-04）；云南省中青年学术和技术带头人后备人才培养项目（2018HB043） |
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| 中文摘要: |
| 为研究丛枝菌根真菌（AMF）对玉米生长与镉（Cd）吸收、土壤团粒组成、壤中流Cd浓度和Cd淋溶流失的影响，本研究以云南兰坪铅锌矿周边Cd污染农田土壤为基质，玉米为宿主植物，设置接种和不接种AMF处理，开展室内盆栽试验。结果表明：与不接种AMF（CK）相比，接种AMF显著增加玉米生物量，降低植株Cd含量与吸收量。接种AMF显著增加0~40 cm土层总球囊霉素相关蛋白（T-GRSP）和易提取球囊霉素相关蛋白（EE-GRSP）的含量，导致粒径（R）>0.25 mm土壤团聚体含量增加55%，R<0.25 mm团聚体含量降低，土壤有效态Cd含量降低26%~43%。接种AMF导致0~30 cm土层壤中流Cd浓度下降14%~22%，Cd淋溶流失量降低29%。相关分析发现：R>0.85 mm的团聚体含量与T-GRSP含量呈显著正相关，R>0.25 mm的团聚体含量与壤中流Cd浓度、Cd淋溶流失量呈极显著负相关；有效态Cd含量与壤中流Cd浓度、Cd淋溶流失量呈极显著和显著正相关。研究表明，与CK相比，接种AMF不仅能增加土壤球囊霉素相关蛋白和大团聚体的含量，而且有助于降低土壤有效态Cd含量与壤中流Cd浓度，减少Cd的淋溶流失，AMF对土壤Cd淋溶流失效应具有重要影响。 |
| 英文摘要: |
| The effects of arbuscular mycorrhizal fungi(AMF)on growth and cadmium(Cd)uptake in maize, soil aggregate composition, Cd concentration in interflows, and leaching loss were investigated. Cd-polluted soils were sampled from farmland around a lead-zinc mine in Lanping County, Yunnan Province. Maize(Zea mays L.)with or without AMF inoculation was planted indoors in pots. The results showed that the AMF inoculation significantly increased the maize biomass and decreased maize ' s Cd content and uptake. AMF significantly increased contents of total glomalin-related soil protein(T-GRSP)and easily extracted glomalin-related soil protein(EE-GRSP)in the 0~40 cm soil layers. Furthermore, AMF increased the content of soil aggregates with a size(R)>0.25 mm by 55% and decreased the content of soil aggregates(R<0.25 mm)as well as the available Cd content by 26%~43%. Moreover, AMF significantly reduced the Cd concentration in the interflow in the 0~30 cm soil layer by 14%~22% and caused a decrease of 29% in Cd leaching from the polluted soil. Correlation analysis indicated that the content of soil aggregates(R>0.85 mm)was positively correlated with the T-GRSP content, and the aggregate content(R>0.25 mm)presented a very significant negative correlation with the Cd concentration in the interflow and Cd leaching from the soil. There was a very significant and significant positive correlation between the available Cd content and Cd concentration in the interflow and Cd leaching loss from the soil, respectively. AMF increased the content of macroaggregates(R>0.25 mm)and glomalin related soil protein in soil, which contributed to reducing the available Cd content in soil and the Cd concentration in the interflow thereby decreasing Cd leaching from polluted soil. Therefore, AMF has an important impact on the effects of soil Cd leaching and loss. |
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