| 苏琳,曹力,张金秀,秦丽,祖艳群,湛方栋.丛枝菌根真菌对溶解态和胶体态Cd淋溶的影响[J].农业环境科学学报,2020,39(8):1741-1747. |
| 丛枝菌根真菌对溶解态和胶体态Cd淋溶的影响 |
| Effects of arbuscular mycorrhizal fungi on leaching of dissolved and colloidal Cd |
| 投稿时间：2020-02-20 |
| DOI：10.11654/jaes.2020-0171 |
| 中文关键词: 丛枝菌根真菌 球囊霉素相关土壤蛋白 比表面积 Cd吸附 淋溶流失 |
| 英文关键词: arbuscular mycorrhizal fungi glomalin-related soil protein specific surface area cadmium adsorption leaching loss |
| 基金项目:国家自然科学基金项目（41661056）；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: |
| 采用粒径0.2 mm的石英砂制备30 cm高的砂柱，在接种和不接种丛枝菌根真菌（Arbuscular mycorrhizal fungi，AMF）条件下种植玉米，施用1 mg·L-1的溶解态和胶体态Cd，开展砂柱培养和模拟淋溶试验，研究AMF对砂粒比表面积、砂柱溶液Cd浓度和淋溶流失的影响。结果表明： AMF菌丝在砂柱中生长和分泌球囊霉素相关土壤蛋白（GRSP），增大石英砂的比表面积，增加石英砂对Cd的吸附量与吸附能力；接种AMF显著降低砂柱10 cm处溶液中溶解态和胶体态Cd的浓度，减少Cd的淋溶流失量；相关性分析表明，在AMF接种情形下，砂柱中GRSP含量与砂粒Cd吸附量呈显著正相关，GRSP含量与砂柱溶液Cd浓度呈显著负相关，且砂粒Cd吸附量与砂柱溶液Cd浓度呈显著负相关，砂柱20 cm深度的砂粒Cd吸附量与Cd流失量呈显著负相关，砂柱30 cm深度的溶液Cd浓度与Cd流失量呈显著正相关。可见，AMF菌丝通过分泌GRSP、增大石英砂的比表面积，增强石英砂对Cd的吸附，从而降低砂柱溶液Cd浓度与Cd淋溶流失。 |
| 英文摘要: |
| In the present study, a sand column at a height of 30 cm was made by quartz sand with a diameter of 0.2 mm. Maize(Zea mays L.)was cultivated with or without an inoculation of arbuscular mycorrhizal fungi(AMF). Dissolved and colloidal Cd of 1 mg·L-1 were added into the sand column. Then, sand column cultivation and leaching experiments were carried out to investigate the effects of AMF on the specific surface area of the quartz sand, Cd concentration in the sand column solution, and Cd leaching loss. The results showed that:AMF mycelium grown in the sand column and secreted glomalin-related soil protein(GRSP)increased the specific surface area of quartz sand and promoted the sorption amount and adsorption capacity of the quartz sand for Cd; the inoculated AMF significantly reduced the concentration of dissolved and colloidal Cd in the solution at a depth of 10 cm in the sand column and reduced the Cd leaching loss; and the correlation analysis indicated that the GRSP content in the sand column had a significant positive correlation with the Cd adsorption amount of the quartz sand but was negatively correlated with the Cd concentration of solutions in the sand column for the AMF inoculation treatment. Furthermore, the Cd adsorption amount of the quartz sand had a significant negative correlation with the Cd concentration of solutions in the sand column. The Cd adsorption amount of the quartz sand at a 20 cm depth was significantly negatively correlated, while the Cd concentration of the solution at a 30 cm depth was significantly positively correlated with the Cd leaching loss from the sand column. Thus, the AMF mycelium secreted GRSP increase the specific surface area of the quartz sand and its Cd adsorption and thereby, reduce the Cd concentration and leaching loss from the sand column. |
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