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[{"key": "dc.contributor.author", "value": "H\u00e4s\u00e4, Miko", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2011-06-17T12:58:16Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2011-06-17T12:58:16Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2011", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1162893", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/27197", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Tehomaatalous pyrkii maksimoimaan maan tuottavuutta. Samalla se saattaa kuitenkin vaikuttaa negatiivisesti agroekosysteemien ravinnekiertoon ja maaper\u00e4n rakenteeseen. Maaper\u00e4el\u00e4inten toiminnallisen monimuotoisuuden pieneneminen voi osaltaan heikent\u00e4\u00e4 maan ravinnekiertoa ja rakennetta. T\u00e4ss\u00e4 tutkimuksessa kasvatettiin mikrokosmoksissa vehn\u00e4\u00e4 ja verrattiin tehomaatalousk\u00e4yt\u00f6ss\u00e4 olleen maan ja laidunmaan kyky\u00e4 pid\u00e4tt\u00e4\u00e4 ravinteita (N) ja torjunta-aineita (metributsiini) sek\u00e4 tutkittiin, miten \u00e4nkyrimadot ja lierot vaikuttavat ravinteiden ja torjunta-aineen valuntaan. Laidunmaa pid\u00e4tti torjunta-ainetta paremmin kuin tehomaatalousmaa, mik\u00e4 johtui l\u00e4hinn\u00e4 laidunmaan suuremmasta orgaanisen aineen pitoisuudesta. Oletuksen vastaisesti tehomaatalousmaa pid\u00e4tti paremmin ravinteita kuin laidunmaa. Vehn\u00e4n tuottavuus oli my\u00f6s parempaa tehomaatalousmaalla. Erilainen lannoitushistoria sek\u00e4 maiden kova k\u00e4sittely koetta perustettaessa saattoivat olla syyn\u00e4 havaittuihin ravinnekierron eroihin. Maaper\u00e4el\u00e4imet eiv\u00e4t lis\u00e4nneet ravinteiden valuntaa, mutta sek\u00e4 laidun- ett\u00e4 tehomaatalousmaalla lierot vaikuttivat positiivisesti vehn\u00e4n kasvuun. Sen sijaan \u00e4nkyrimadoilla oli yll\u00e4tt\u00e4en jopa negatiivinen vaikutus vehn\u00e4n kasvuun. Maaper\u00e4el\u00e4imet eiv\u00e4t v\u00e4hent\u00e4neet torjunta-aineen valuntaa. Mikrokosmoksissa, joissa oli sek\u00e4 \u00e4nkyrimatoja ett\u00e4 lieroja, torjunta-aineen valunta oli suurinta. Maahan lis\u00e4tty torjunta-aine lis\u00e4si ravinteiden valuntaa todenn\u00e4k\u00f6isesti tehostamalla mikrobiaktiivisuutta. Tehomaatalouden harjoittama maanmuokkaus voi lis\u00e4t\u00e4 torjunta-aineiden valuntaa sek\u00e4 \u2013 v\u00e4hent\u00e4m\u00e4ll\u00e4 lierojen m\u00e4\u00e4r\u00e4\u00e4 \u2013 heikent\u00e4\u00e4 maan tuottavuutta. Sen sijaan maaper\u00e4el\u00e4inten v\u00e4heneminen ei t\u00e4m\u00e4n tutkimuksen perusteella n\u00e4ytt\u00e4isi lis\u00e4\u00e4v\u00e4n torjunta-aineen valuntaa. Torjunta-aineiden k\u00e4ytt\u00f6 voi lis\u00e4t\u00e4 torjunta-ainekuormituksen ohella my\u00f6s ymp\u00e4rist\u00f6n ravinnekuormitusta.", "language": null, "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Miko H\u00e4s\u00e4 (miheanha) on 2011-06-17 12:58:14.327472. 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 2011-06-17T12:58:16Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-2011061711030.pdf: 852060 bytes, checksum: 852fd6d1722808d4f6a84900a9b086ff (MD5)\nlicense.html: 5029 bytes, checksum: aec440b3086575cc4ab2f63ad7996fd7 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2011-06-17T12:58:16Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-2011061711030.pdf: 852060 bytes, checksum: 852fd6d1722808d4f6a84900a9b086ff (MD5)\nlicense.html: 5029 bytes, checksum: aec440b3086575cc4ab2f63ad7996fd7 (MD5)\n Previous issue date: 2011", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "24 sivua", "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": "lierot", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "maatalous", 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