Organic amendment effects on community diversity of indigenous arbuscular mycorrhizal fungi in a field soil

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George, Christine
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University of Guelph

Management of community diversity of plant-associated arbuscular mycorrhizal fungi (AMF) may be key to the improvement and sustainability of low-input agricultural systems. This research examined the diversity of the indigenous AMF community following an application of turkey litter compost (TLC) and broiler poultry manure (BPM) to a field soil cropped to winter wheat using PCR-denaturing gradient gel electrophoresis (DGGE). By the first fall, 6 months after application of TLC at a rate of 19 T/ha, indigenous soil AMF community diversity was significantly increased compared to the control (no amendment). Additionally, increasing TLC application from 9.5 T/ha to 19 T/ha showed a trend to increase the indigenous AMF community diversity. There were no significant differences in AMF community diversity a year after application of TLC and BPM. This research provides insight into organic amendment effects on soil AMF community diversity which will assist in developing sustainable agricultural practices.

arbuscular mycorrhiza, organic agriculture, manure, compost, DGGE, community diversity