作者调查了黄河三角洲盐碱地丛枝菌根(Arbuscular mycorrhizae, AM)真菌的资源状况。共分离鉴定出Acaulospora属6种, Archaespora属2种, Glomus 属24种, 其中G. melanosporum, G. pansihalos, G. pustulatum, G. tenebrosum等4种为我国...作者调查了黄河三角洲盐碱地丛枝菌根(Arbuscular mycorrhizae, AM)真菌的资源状况。共分离鉴定出Acaulospora属6种, Archaespora属2种, Glomus 属24种, 其中G. melanosporum, G. pansihalos, G. pustulatum, G. tenebrosum等4种为我国的新记录种。展开更多
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 Asconta...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 Ascontaminated 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.Twentyseven 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.展开更多
基金Supported by the Key Foundation of Ministry of Education of PRC (No. 104034)the National Natural Science Foundation of China Grants (No. 30670047,30870087 and No. 30499340)
文摘作者调查了黄河三角洲盐碱地丛枝菌根(Arbuscular mycorrhizae, AM)真菌的资源状况。共分离鉴定出Acaulospora属6种, Archaespora属2种, Glomus 属24种, 其中G. melanosporum, G. pansihalos, G. pustulatum, G. tenebrosum等4种为我国的新记录种。
基金Project supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (No. KZCX2-YW-408)the Innovative Research International Partnership Program of the Chinese Academy of Sciences (No. CXTD-Z2005-4)the Program of Social Development of Jiangsu Province (No. BS2006025)
文摘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 Ascontaminated 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.Twentyseven 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.
