Dolomite and Micronutrient Fertilizer Affect Phosphorus Fate in Pine Bark Substrate used for Containerized Nursery Crop Production

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dc.contributor.authorShreckhise, Jacob H.en
dc.contributor.authorOwen, James S. Jr.en
dc.contributor.authorEick, Matthew J.en
dc.contributor.authorNiemiera, Alexander X.en
dc.contributor.authorAltland, James E.en
dc.contributor.authorWhite, Sarah A.en
dc.contributor.departmentSchool of Plant and Environmental Sciencesen
dc.contributor.departmentVirginia Agricultural Experiment Stationen
dc.date.accessioned2020-02-26T14:08:01Zen
dc.date.available2020-02-26T14:08:01Zen
dc.date.issued2019-09en
dc.description.abstractDolomite and a micronutrient fertilizer are routinely incorporated into a pine bark-based soilless substrate when producing containerized nursery crops, yet the effect of these amendments on phosphorus (P) is not well understood. The objective of this research was to determine the effect of dolomite and micronutrient fertilizer amendments on P partitioning among four P fractions (i.e., orthophosphate-P EOM non-orthophosphate dissolved P [NODP], total dissolved P [TDP], and particulate P (PPJ) and to model potential P species in leachate of pine bark substrate. Amendment treatments incorporated into bark at experiment initiation included (1) a control (no fertilizer, dolomite, or micronutrient fertilizer), (2) controlled-release fertilizer (CRF), (3) CRF and dolomite, (4) CRF and micronutrient fertilizer, or (5) CRF, dolomite, and micronutrient fertilizer. Phosphorus fractions in leachate of irrigated pine bark columns were determined at eight sampling times over 48 days. Amending pine bark with dolomite and micronutrient fertilizer reduced leachate OP concentrations by 70% when averaged across sampling dates primarily due to retention of OP in the substrate by dolomite. The NODP fraction was unaffected by amendments, and the response of TDP was similar to that of OP. Particulate P was present throughout the study and was strongly correlated particulate Fe and DOC concentrations. Visual MINTEQ indicated MnHPO4 and Ca-5(PO4)(3)(OH) were consistently saturated with respect to their solid phase in treatments containing CRF. Results of this study suggest amending pine bark with dolomite and micronutrients is a best management practice for reducing P leaching from containerized nurseries.en
dc.description.adminPublic domain – authored by a U.S. government employeeen
dc.description.notesThe authors thank Julie Brindley, Velva Groover, Anna Birnbaum, and Doug Sturtz for technical assistance, as well as Pacific Organics for donating pine bark for this research. Funding was provided by the Virginia Agricultural Experiment Station and the Hatch Program of the National Institute of Food and Agriculture (including SCRI 2014-51181-22372), the US Dep. of Agriculture, the Horticultural Research Institute, and the Virginia Nursery and Landscape Association.en
dc.description.sponsorshipVirginia Agricultural Experiment Station of the National Institute of Food and Agriculture [SCRI 2014-51181-22372]; Hatch Program of the National Institute of Food and Agriculture [SCRI 2014-51181-22372]; US Dep. of Agriculture; Horticultural Research Institute; Virginia Nursery and Landscape Associationen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.2136/sssaj2018.12.0493en
dc.identifier.eissn1435-0661en
dc.identifier.issn0361-5995en
dc.identifier.issue5en
dc.identifier.urihttp://hdl.handle.net/10919/97055en
dc.identifier.volume83en
dc.language.isoenen
dc.rightsCC0 1.0 Universalen
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/en
dc.titleDolomite and Micronutrient Fertilizer Affect Phosphorus Fate in Pine Bark Substrate used for Containerized Nursery Crop Productionen
dc.title.serialSoil Science Society of America Journalen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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