Nitrogen Mineralization from Brassica Cover Crops

dc.contributor.advisorWeil, Rayen_US
dc.contributor.authorKremen, Amyen_US
dc.contributor.departmentPlant Science and Landscape Architecture (PSLA)en_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.description.abstractThe potential of forage radish (<em>Raphanus sativus</em> L.), rape (<em>Brassica napus</em> L.), and rye (<em>Secale cereale</em> L.) cover crops to capture residual nitrogen and then provide early season N to subsequent main crops via mineralization from their residues was compared. At four field experiments established in Maryland (2003-2005), N uptake by radish and rape equaled or exceeded that by rye. No differences in soil inorganic N due to cover crop type were observed during spring 2004. In spring 2005, greatest N release from forage radish residues (March-May) was followed by that from rape residues (May-June). Brassica decay significantly increased growth of immature corn and soybean plants. In a 48-day incubation study comparing N mineralization in fine and coarse textured soils from Brassica and rye root or shoot residues, N mineralization was greatest from forage radish and rape shoots. Compared with rye, the Brassica cover crops showed environmental and agronomic promise.en_US
dc.format.extent1207034 bytes
dc.subject.pqcontrolledAgriculture, Soil Scienceen_US
dc.subject.pqcontrolledAgriculture, Agronomyen_US
dc.subject.pquncontrolledBrassica cover cropsen_US
dc.subject.pquncontrolledcarbon and nitrogen mineralizationen_US
dc.subject.pquncontrollednitrogen cyclingen_US
dc.titleNitrogen Mineralization from Brassica Cover Cropsen_US


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