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[{"key": "dc.contributor.advisor", "value": "Kyt\u00f6viita, Minna-Maarit", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Autio, Jenni", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2023-06-27T06:04:28Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2023-06-27T06:04:28Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2023", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/88078", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Hakkuut\u00e4hteet ovat hakkuiden yhteydess\u00e4 mets\u00e4\u00e4n j\u00e4\u00e4v\u00e4\u00e4 puuta, jota voidaan hy\u00f6dynt\u00e4\u00e4 energiantuotannossa. Hakkuut\u00e4hteill\u00e4 voi olla merkityst\u00e4 maaper\u00e4n ominaisuuksien, kuten happamuuden ja orgaanisen aineksen m\u00e4\u00e4r\u00e4n kannalta. N\u00e4ihin ominaisuuksiin voivat vaikuttaa my\u00f6s eri puulajit. T\u00e4m\u00e4n tutkimuksen tarkoituksena oli selvitt\u00e4\u00e4, kuinka hakkuut\u00e4hde ja puulajit vaikuttavat mets\u00e4maan humus- ja huuhtoutumiskerroksen happamuuteen ja orgaanisen aineksen m\u00e4\u00e4r\u00e4\u00e4n. Lis\u00e4ksi vertailtiin pH:n mittausmenetelmi\u00e4 tislatussa vedess\u00e4 (dH2O) ja kalsiumkloridissa (CaCl2) mitattuna. Samalla tutkittiin maakerrosten paksuuden vaikutuksia edell\u00e4 mainittuihin muuttujiin, sek\u00e4 orgaanisen aineksen m\u00e4\u00e4r\u00e4n ja pH:n vaikutuksia toisiinsa. Tutkimusalue koostui kolmesta eri m\u00e4\u00e4r\u00e4t hakkuut\u00e4hdett\u00e4 sis\u00e4lt\u00e4v\u00e4st\u00e4 k\u00e4sittelyalueesta, joiden sis\u00e4ll\u00e4 puulaji vaihteli kuusen (Picea abies) ja rauduskoivun (Betula pendula) v\u00e4lill\u00e4. Alhaisempi hakkuut\u00e4hteen m\u00e4\u00e4r\u00e4 v\u00e4hensi humuskerroksen orgaanisen aineksen pitoisuutta, mutta ei vaikuttanut happamuuteen tai huuhtoutumiskerroksen orgaanisen aineksen pitoisuuteen. Puulajilla ei ollut merkityst\u00e4 orgaanisen aineksen tai pH:n suhteen. Kalsiumkloridissa mitatut pH-arvot olivat alhaisempia kuin vedess\u00e4 mitatut. Huuhtoutumiskerroksen paksuuden ja orgaanisen aineksen pitoisuuden v\u00e4lill\u00e4 havaittiin yhteys, ja huuhtoutumiskerroksen orgaanisen aineksen pitoisuus korreloi humuskerroksen pH:n kanssa. Tutkimuksen luotettavuutta rajoittavat tutkimusalueiden sekamets\u00e4isyys, ep\u00e4varmuudet puiden laskennassa ja maan paksuuden mittauksessa, sek\u00e4 eroavuudet k\u00e4sittelyalueiden ominaisuuksissa.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Logging residues consist of wood left in the forest after a felling, which can be utilized in energy production. Logging residues can also affect soil properties, such as acidity and organic matter content. Another factor affecting soil characteristics is tree species. The aim of this study was to determine how different amounts of logging residue and different tree species \u2013 Norway spruce (Picea abies) and silver birch (Betula pendula) \u2013 affect soil organic matter content and acidity in both humus and eluvial layers. The pH was measured in distilled water (dH2O) and in calcium chloride (CaCl2) solutions to compare different methods. The effects of soil layer thickness on the aforementioned factors were examined as well, along with the effects of soil organic matter content and pH on each other. The study area consisted of three plots with different amounts of logging residue, where tree species varied between spruce and birch. The results suggest that a lower amount of logging residue decreases organic matter content in the humus layer. Logging residues didn\u2019t affect pH or organic matter content in the eluvial layer. Tree species had no effect on soil organic matter content or pH. The pH values measured in CaCl2 were expectedly lower than in distilled water. Eluvial layer thickness seemed to be connected to organic matter content in both layers, and organic matter content in eluvial layer correlated with pH in humus layer. The credibility of this study was however hampered by the unpredicted mixed-species stands, the unreliable measurement of eluvial layer thickness and uncertainty caused by different inherent properties of the soils between the plots.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2023-06-27T06:04:28Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2023-06-27T06:04:28Z (GMT). No. of bitstreams: 0\n Previous issue date: 2023", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "68", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": null, "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "humuskerros", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "huuhtoutumiskerros", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "pH", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Hakkuut\u00e4hteen ja puulajin vaikutus mets\u00e4maan orgaanisen aineksen m\u00e4\u00e4r\u00e4\u00e4n ja happamuuteen", "language": "", "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202306274139", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Bio- ja ymp\u00e4rist\u00f6tieteiden laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Biological and Environmental Science", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Ymp\u00e4rist\u00f6tiede", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Environmental science", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.copyright", "value": "\u00a9 The Author(s)", "language": null, "element": "rights", "qualifier": "copyright", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "restrictedAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "40151", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kangasmets\u00e4t", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "mets\u00e4nhoito", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "rauduskoivu", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "orgaaninen aines", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "hakkuut\u00e4hteet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "maaper\u00e4", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "mets\u00e4kuusi", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "happamuus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "paksuus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.rights.accessrights", "value": "The author has not given permission to make the work publicly available electronically. Therefore the material can be read only at the archival workstation at Jyv\u00e4skyl\u00e4 University Library (https://kirjasto.jyu.fi/collections/archival-workstation).", "language": "en", "element": "rights", "qualifier": "accessrights", "schema": "dc"}, {"key": "dc.rights.accessrights", "value": "Tekij\u00e4 ei ole antanut lupaa avoimeen julkaisuun, joten aineisto on luettavissa vain Jyv\u00e4skyl\u00e4n yliopiston kirjaston arkistoty\u00f6semalta. Ks. https://kirjasto.jyu.fi/kokoelmat/arkistotyoasema..", "language": "fi", "element": "rights", "qualifier": "accessrights", "schema": "dc"}]
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