| 砷污染土壤中接种丛枝菌根真菌和蚯蚓对土壤线虫群落和植物砷吸收的影响 |
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| 作者姓名： | HUA Jian-Feng LIN Xian-Gui BAI Jian-Feng SHAO Yu-Fang YIN Rui JIANG Qian |
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| 作者单位： | [1]State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences,Nanjing 210008 （China） [2]Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014 （China） [3]Department of Environmental Engineering, Shanghai Second Polytechnic University, Shanghai 201209 （China） [4]Soil and Environment Analysis Center, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 （China） [5]College of the Ecosystem Environment, Inner Mongolia Agricultural University, Huhhot 010019 （China） [6]Graduate University of the Chinese Academy of Sciences, Beijing 100049 （China） |
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| 基金项目： | Project supported by the Knowledge Innovation Program of the Chinese Academy of Sciences，the Innovative Research International Partnership Program of the Chinese Academy of Sciences，the Program of Social Development of Jiangsu Province |
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| 摘 要： | The influences of arbuscular mycorrhizal fungi (MF, Acaulospora spp. and Glomus spp.), rice straw and earthworms (RE, Eisenia foetida) on nematode communities and arsenic (As) uptake by maize (Zea mays L.) in As-contaminated soils were examined in a field experiment conducted in Wujiang, Jiangsu Province, China. The experiment was designed as a 2 × 2 factorial with the factors of MF (inoculated or uninoculated) and RE (added or not added). The results demonstrated that MF inoculation led to significantly higher root colonization of MF and root dry weight. Plants inoculated with both MF and RE had the highest As concentrations in root. The number of total nematodes increased with MF inoculation when RE was absent, and decreased with RE addition when MF was inoculated. The improved abundance of nematodes with the MF treatment implied that the tested MF acted as food sources for fungivores. The abundances of omnivores-predators and plant parasites were reduced by earthworm activity. Twenty-seven genera of nematodes were identified, with Filenchus dominant in all treatments. Trophic diversity (TD), Shannon-Weaver diversity (H′), Simpson dominance index (λ), and species richness (SR) indicated higher species diversity, more proportionate species composition, evenly distributed species, and more food sources in the MF, RE, and their interaction treatments. Maturity index (MI) showed a moderately disturbed environment due to As pollution. Besides enhancing plant uptake of contaminants, MF and RE amendments could also improve soil health by restoring the structure of soil communities, as reflected by more stable nematode community structure.
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| 关 键 词： | 丛枝菌根真菌 砷污染 线虫群落 土壤 玉米 蚯蚓 吸收 |
| 收稿时间： | 16 September 2009 |
Effects of arbuscular mycorrhizal fungi and earthworm on nematode communities and arsenic uptake by maize in arsenic-contaminated soils |
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| HUA Jian-Feng,LIN Xian-Gui,BAI Jian-Feng,SHAO Yu-Fang,YIN Rui,JIANG Qian.Effects of arbuscular mycorrhizal fungi and earthworm on nematode communities and arsenic uptake by maize in arsenic-contaminated soils[J].Pedosphere,2010,20(2):163-173. |
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| Authors: | HUA Jian-Feng LIN Xian-Gui BAI Jian-Feng SHAO Yu-Fang YIN Rui and JIANG Qian |
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| Institution: | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014 (China)
;Graduate University of;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China); Department of Environmental Engineering, Shanghai Second Polytechnic University, Shanghai 201209 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);College of the Ecosystem Environment, Inner Mongolia Agricultural University, Huhhot 010019 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);Soil and Environment Analysis Center, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China) |
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| Abstract: | The influences of arbuscular mycorrhizal fungi (AMF, Acaulospora spp. And Glomus spp.) and rice straw and earthworms (RE, Eisenia foetida) on nematode communities and arsenic (As) uptake by maize (Zea mays L.) in As-contaminated soils were examined in a field experiment conducted in Wujiang, Jiangsu Province, China. The experiment was designed as a 2 × 2 factorial with the factors of AMF (inoculated or uninoculated) and RE (added or not added). The results demonstrated that AMF inoculation led to significantly higher root colonization of AMF and root dry weight. Plants inoculated with both AMF and RE had the highest As concentrations in root. The number of total nematodes increased with AMF inoculation when RE was absent, and decreased with RE addition when AMF was inoculated. The improved abundance of nematodes with the AMF treatment implied that the tested AMF acted as food sources for fungivores. The abundances of omnivores-predators and plant parasites were reduced by earthworm activity. Twenty-seven genera of nematodes were identified, with Filenchus dominant in all treatments. Trophic diversity, Shannon-Weaver diversity, Simpson dominance index, and species richness indicated higher species diversity, more proportionate species composition, evenly distributed species, and more food sources in the AMF, RE, and their interaction treatments. Maturity index showed a moderately disturbed environment due to As pollution. Besides enhancing plant uptake of contaminants, AMF and RE amendments could also improve soil health by restoring the structure of soil communities, as reflected by more stable nematode community structure. |
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| Keywords: | Acaulospora spp ecological indices Eisenia foetida functional groups Glomus spp |
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