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Impacts of Multi-Species Cover Crops and Manure on Bacterial and Fungal Communities

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Title: Impacts of Multi-Species Cover Crops and Manure on Bacterial and Fungal Communities
Author: Mazurek, Travis Jack
Department: School of Environmental Sciences
Program: Environmental Sciences
Advisor: Dunfield, Kari
Abstract: Agriculture has reduced the biodiversity of natural landscapes and the inputs of organic nutrients to soil. Cover crops increase biodiversity and organic nutrients. Soil microbes are vastly diverse and regulate nutrient cycles. Literature on relationships between plants and soil microbes are inconsistent. A farmer-cooperative, field experiment was established with a main cover crop treatment (0, 1, 4, 12 plant species) and a split manure treatment (with and without) on a commercial agricultural field. qPCR and MiSeq Illumina were used to measure total bacterial (16S rDNA) and fungal (18S rDNA) abundance, and total fungal diversity (ITS2), respectively. NMDS revealed fungal diversity differed between fields/years. Cover crops and manure increased bacterial and fungal abundances. Further, cover crop species richness positively correlated with microbial abundance only on field B and did not correlate with fungal diversity. Overall, agricultural management can impact soil microbes, but microbial responses are dependent on season, year, and field.
Date: 2019-12
Rights: Attribution-NonCommercial-NoDerivatives 4.0 International
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Attribution-NonCommercial-NoDerivatives 4.0 International Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International