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dc.contributor.authorLaird, David A.en_US
dc.contributor.authorChang, Cheng-Wenen_US
dc.date.accessioned2014-12-08T15:32:53Z-
dc.date.available2014-12-08T15:32:53Z-
dc.date.issued2013-11-01en_US
dc.identifier.issn0167-1987en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.still.2013.07.001en_US
dc.identifier.urihttp://hdl.handle.net/11536/22941-
dc.description.abstractDevelopment of the cellulosic bioenergy industry raises the prospect of wide spread stover harvesting in the near future; however, the impact of stover harvesting on soil quality may not be apparent for several years. Here we evaluate the impact of 19 years of either zero or approximately 90% removal of above ground crop residue on soil quality. The 0-5, 5-15, and 15-30 cm soil depths of Waukegan silt loam (Typic Hapludoll) from east-central Minnesota were sampled from plots after 12 and 7 years of maize and soybean cropping, respectively. On average for the 0-5 and 5-15 cm depths, soil organic C was 12% less, total N was 12.6% less, N mineralization potential was 27.7% less, cation exchange capacity was 7.3% less, macro aggregation was 13.0% less, and total respiration was 12.3% less for plots with residue harvesting relative to plots where residue was not harvested. Minimal impacts of residue harvesting were apparent for the 15-30 cm soil samples, except N mineralization potential which was 28% lower for plots with residue harvesting. Declines in soil quality indicators due to residue harvesting were only slightly less severe for no-tillage plots relative to chisel and moldboard plow tillage plots. We conclude that harvesting 90% of above ground residue for 19 years resulted in substantial degradation of soil quality, and that the impact on N mineralization potential was substantially larger than the loss of total N, suggesting that labile organic N was selectively depleted. We also conclude that stover harvesting for bioenergy production could cause similar degradation of soil quality unless management practices that increase C inputs to soils are also implemented. (C) 2013 Elsevier B.V. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectBioenergyen_US
dc.subjectBiomass harvestingen_US
dc.subjectResidueen_US
dc.subjectSoil qualityen_US
dc.subjectNitrogen mineralization potentialen_US
dc.titleLong-term impacts of residue harvesting on soil qualityen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.still.2013.07.001en_US
dc.identifier.journalSOIL & TILLAGE RESEARCHen_US
dc.citation.volume134en_US
dc.citation.issueen_US
dc.citation.spage33en_US
dc.citation.epage40en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:000326553700005-
dc.citation.woscount3-
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