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[{"key": "dc.contributor.author", "value": "K\u00e4rkk\u00e4inen, Eero-Tapani", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2010-12-30T18:59:03Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2010-12-30T18:59:03Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2010", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1145648", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/25756", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "T\u00e4m\u00e4 opinn\u00e4ytety\u00f6 k\u00e4ynnistettiin Vapo oy Energian tilauksesta, kun yhti\u00f6 oli aloittamassa\nlaajamittaista hakkuut\u00e4hteiden ker\u00e4\u00e4mist\u00e4. Opinn\u00e4ytety\u00f6ss\u00e4 on perehdytty hakkuut\u00e4hteiden\nker\u00e4\u00e4misen vaikutuksiin maaper\u00e4ss\u00e4, vesist\u00f6iss\u00e4 sek\u00e4 muussa mets\u00e4luonnossa.\nHakkuut\u00e4hteiden korjuun taloudellisia vaikutuksia oli tarkoitus selvitt\u00e4\u00e4 mahdollisimman\nhavainnollisesti, ja muuntaa tulokset rahallisesti arvioitaviksi.\nMets\u00e4nuudistamisessa hakkuut\u00e4hteiden ker\u00e4\u00e4misell\u00e4 on p\u00e4\u00e4asiassa positiivisia vaikutuksia:\nmaanmuokkaus onnistuu paremmin, istutusolosuhteet ovat helpommat ja luonnontaimien\nt\u00e4ydent\u00e4v\u00e4 vaikutus on suurempi kuin runsaasti hakkuut\u00e4hteit\u00e4 sis\u00e4lt\u00e4v\u00e4ll\u00e4 kohteella. Hakkuut\u00e4hdekasojen\nalle aikaisemmin j\u00e4\u00e4nyt pinta-ala saadaan hy\u00f6tyk\u00e4ytt\u00f6\u00f6n, ja siksi taimikon\ntiheys on tasaisempi. Taimien tuhoriski on hieman pienempi hakkuut\u00e4hteiden ker\u00e4\u00e4misen\nj\u00e4lkeen, osittain juuri tehokkaamman maanmuokkauksen vuoksi.\nRavinteita poistuu huomattavia m\u00e4\u00e4ri\u00e4 hakkuut\u00e4hteiden ker\u00e4\u00e4misen yhteydess\u00e4. Hakkuut\u00e4hteiden\nkeruu ei kuitenkaan vaaranna mets\u00e4maan puuntuotoskyky\u00e4 ainakaan kertaluontoisena\ntoimenpiteen\u00e4. Mik\u00e4li biomassaa ker\u00e4t\u00e4\u00e4n toistuvasti samoilta kohteilta vuosikymmenten\nkuluessa, on vaarana maaper\u00e4n ravinnevarojen v\u00e4heneminen ja maaper\u00e4n happamoituminen.\nMik\u00e4li ravinnemenetyksi\u00e4 korvataan, se kannattaa toteuttaa vasta syntyneen puuston harvennushakkuiden\nyhteydess\u00e4.\nHakkuut\u00e4hteell\u00e4 tuotetulla energialla voidaan alentaa l\u00e4mp\u00f6laitoksen p\u00e4\u00e4st\u00f6j\u00e4 merkitt\u00e4v\u00e4sti.\nEsimerkiksi korvaamalla kivihiilt\u00e4 hakkuut\u00e4hteell\u00e4 saadaan hakkuut\u00e4hteiden talteenotolla\np\u00e4\u00e4tehakkuun yhteydess\u00e4 v\u00e4hennetty\u00e4 energiatuotannon hiilidioksidip\u00e4\u00e4st\u00f6j\u00e4 n. 40 t hehtaaria\nkohti. P\u00e4\u00e4st\u00f6kaupassa hehtaaria kohti hakkuut\u00e4hteen arvo on useita satoja euroja hiilidioksidip\u00e4\u00e4st\u00f6n\nhinnasta riippuen.", "language": "", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Eero K\u00e4rkk\u00e4inen (eekarkka) on 2010-12-30 18:58:57.289971. Form: Pro gradu -lomake (1 tekij\u00e4) (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake-1-tekijae). JyX data:", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija@noreply.fi) on 2010-12-30T18:59:03Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-201012303223.pdf: 586181 bytes, checksum: 6de90da195674fbafa12c524cc7975d3 (MD5)\nlicense.html: 5073 bytes, checksum: 7e9dd02b6889208e2d79ad166388c10a (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2010-12-30T18:59:03Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-201012303223.pdf: 586181 bytes, checksum: 6de90da195674fbafa12c524cc7975d3 (MD5)\nlicense.html: 5073 bytes, checksum: 7e9dd02b6889208e2d79ad166388c10a (MD5)\n Previous issue date: 2010", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "73 s", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "hakkuut\u00e4hde", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ymp\u00e4rist\u00f6vaikutus", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Hakkuut\u00e4hteiden korjuun ymp\u00e4rist\u00f6vaikutukset sek\u00e4 hakkuut\u00e4hteiden korjuun vaikutus mets\u00e4nuudistamisen kokonaiskustannuksiin", "language": null, "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-201012303223", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.dcmitype", "value": "Text", "language": "en", "element": "type", "qualifier": "dcmitype", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "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": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Ymp\u00e4rist\u00f6tiede ja -teknologia", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Environmental science and technology", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": "fi", "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": "4015", "language": null, "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "hakkuut\u00e4hteet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ymp\u00e4rist\u00f6vaikutukset", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "energiapuu", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "mets\u00e4maa", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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