{"id":2729,"date":"2025-03-04T10:45:52","date_gmt":"2025-03-04T10:45:52","guid":{"rendered":"https:\/\/paul-tech.com\/?p=2729"},"modified":"2026-03-12T15:41:01","modified_gmt":"2026-03-12T15:41:01","slug":"maanaytteet-vs-maaperaaseman-tiedot","status":"publish","type":"post","link":"https:\/\/paul-tech.com\/fi\/maanaytteet-vs-maaperaaseman-tiedot\/","title":{"rendered":"Maan\u00e4ytteet vs. maaper\u00e4aseman tiedot"},"content":{"rendered":"<div class=\"wp-block-post-date\"><time datetime=\"2025-03-04T10:45:52+00:00\">March 4, 2025<\/time><\/div>\n\n\n<ul class=\"wp-block-social-links is-layout-flex wp-block-social-links-is-layout-flex\"><li class=\"wp-social-link wp-social-link-facebook  wp-block-social-link\"><a rel=\"noopener nofollow\" target=\"_blank\" href=\"https:\/\/www.facebook.com\/PaulTechEstonia\" class=\"wp-block-social-link-anchor\"><svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\" 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class=\"wp-social-link wp-social-link-youtube  wp-block-social-link\"><a rel=\"noopener nofollow\" target=\"_blank\" href=\"https:\/\/www.youtube.com\/@paul-tech_esoil\" class=\"wp-block-social-link-anchor\"><svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M21.8,8.001c0,0-0.195-1.378-0.795-1.985c-0.76-0.797-1.613-0.801-2.004-0.847c-2.799-0.202-6.997-0.202-6.997-0.202 h-0.009c0,0-4.198,0-6.997,0.202C4.608,5.216,3.756,5.22,2.995,6.016C2.395,6.623,2.2,8.001,2.2,8.001S2,9.62,2,11.238v1.517 c0,1.618,0.2,3.237,0.2,3.237s0.195,1.378,0.795,1.985c0.761,0.797,1.76,0.771,2.205,0.855c1.6,0.153,6.8,0.201,6.8,0.201 s4.203-0.006,7.001-0.209c0.391-0.047,1.243-0.051,2.004-0.847c0.6-0.607,0.795-1.985,0.795-1.985s0.2-1.618,0.2-3.237v-1.517 C22,9.62,21.8,8.001,21.8,8.001z M9.935,14.594l-0.001-5.62l5.404,2.82L9.935,14.594z\"><\/path><\/svg><span class=\"wp-block-social-link-label screen-reader-text\">YouTube<\/span><\/a><\/li>\n\n<li class=\"wp-social-link wp-social-link-tiktok  wp-block-social-link\"><a rel=\"noopener nofollow\" target=\"_blank\" href=\"https:\/\/www.tiktok.com\/@paultech_soil\" class=\"wp-block-social-link-anchor\"><svg width=\"24\" height=\"24\" viewBox=\"0 0 32 32\" version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M16.708 0.027c1.745-0.027 3.48-0.011 5.213-0.027 0.105 2.041 0.839 4.12 2.333 5.563 1.491 1.479 3.6 2.156 5.652 2.385v5.369c-1.923-0.063-3.855-0.463-5.6-1.291-0.76-0.344-1.468-0.787-2.161-1.24-0.009 3.896 0.016 7.787-0.025 11.667-0.104 1.864-0.719 3.719-1.803 5.255-1.744 2.557-4.771 4.224-7.88 4.276-1.907 0.109-3.812-0.411-5.437-1.369-2.693-1.588-4.588-4.495-4.864-7.615-0.032-0.667-0.043-1.333-0.016-1.984 0.24-2.537 1.495-4.964 3.443-6.615 2.208-1.923 5.301-2.839 8.197-2.297 0.027 1.975-0.052 3.948-0.052 5.923-1.323-0.428-2.869-0.308-4.025 0.495-0.844 0.547-1.485 1.385-1.819 2.333-0.276 0.676-0.197 1.427-0.181 2.145 0.317 2.188 2.421 4.027 4.667 3.828 1.489-0.016 2.916-0.88 3.692-2.145 0.251-0.443 0.532-0.896 0.547-1.417 0.131-2.385 0.079-4.76 0.095-7.145 0.011-5.375-0.016-10.735 0.025-16.093z\" \/><\/svg><span class=\"wp-block-social-link-label screen-reader-text\">TikTok<\/span><\/a><\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/paul-tech.com\/wp-content\/uploads\/2025\/03\/Mullaanalyysid_vs_mullajaama.jpg\" alt=\"\" class=\"wp-image-2730\"\/><\/figure>\n\n\n\n<p>Maanalyysi on arvokas ty\u00f6kalu maataloudessa, sill\u00e4 sen avulla voidaan valita sopivat viljelykasvit, arvioida maaper\u00e4n hedelm\u00e4llisyytt\u00e4 ja antaa lannoitussuosituksia. Luotettavien tietojen saamiseksi on t\u00e4rke\u00e4\u00e4 ottaa edustavia maan\u00e4ytteit\u00e4 ja analysoida ne menetelmill\u00e4, jotka on kalibroitu alueella tehtyjen lannoituskokeiden perusteella.<\/p>\n\n\n\n<p>Toisaalta monet tutkijat ovat havainneet, ett\u00e4 riitt\u00e4v\u00e4n maaper\u00e4n kosteuden vallitessa maaper\u00e4n s\u00e4hk\u00f6njohtavuus (EC) voi kuvata kasvuolosuhteita yht\u00e4 hyvin tai jopa paremmin kuin perinteiset maanalyysit. Kuitenkin s\u00e4hk\u00f6njohtavuuden ja maan\u00e4ytteist\u00e4 mitattujen ravinnepitoisuuksien v\u00e4linen korrelaatio ei ole aina johdonmukainen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Makroravinteet maaper\u00e4ss\u00e4<\/strong><\/h2>\n\n\n\n<p>Maanalyysill\u00e4 m\u00e4\u00e4ritet\u00e4\u00e4n maaper\u00e4n t\u00e4rkeimm\u00e4t makroravinteet, kuten typpi (N), fosfori (P) ja kalium (K), joita kasvit tarvitsevat suuria m\u00e4\u00e4ri\u00e4. Toissijaiset makroravinteet, kuten kalsium (Ca), magnesium (Mg) ja rikki (S), ovat my\u00f6s t\u00e4rkeit\u00e4, mutta niiden puutokset ja lis\u00e4ystarpeet ovat harvinaisempia.<\/p>\n\n\n\n<p>Tyypillisesti maanalyysit tehd\u00e4\u00e4n varhain kev\u00e4\u00e4ll\u00e4, jolloin nitraatin (NO\u2083) \u2013 typen t\u00e4rkeimm\u00e4n kasveille saatavilla olevan muodon \u2013 m\u00e4\u00e4r\u00e4 on alhainen. Maaper\u00e4n kokonaisravinnepitoisuus on paljon suurempi kuin kasveille heti saatavilla oleva osuus.<\/p>\n\n\n\n<p>Esimerkiksi kalium muodostaa noin 1 % maailman maaperist\u00e4 (<em>l\u00e4hde: Soil Chemistry, H.L. Bohm, B.L. McNeal &amp; G.A. O&#8217;Connor, John Wiley &amp; Sons, 2001<\/em>), mutta kasveille saatavilla oleva osuus maaper\u00e4testeiss\u00e4 on vain 100\u2013200 mg\/kg, mik\u00e4 vastaa vain 1\u20132 % kaliumin kokonaispitoisuudesta.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Maan\u00e4ytteet: mit\u00e4 ja miten mitataan<\/strong><\/h2>\n\n\n\n<p>Sama periaate p\u00e4tee kaikkiin kasviravinteisiin. Laboratoriomenetelmi\u00e4 on kehitetty erityisesti kasveille saatavilla olevien ravinteiden m\u00e4\u00e4ritt\u00e4miseen, ja n\u00e4m\u00e4 menetelm\u00e4t on validoitu lannoituskokeilla.<\/p>\n\n\n\n<p>Euroopassa on k\u00e4yt\u00f6ss\u00e4 12 erilaista maanalyysimenetelm\u00e4\u00e4, joissa k\u00e4ytet\u00e4\u00e4n eri uuttoliuoksia. T\u00e4m\u00e4 tarkoittaa, ett\u00e4 eri laboratorioiden tulokset eiv\u00e4t ole suoraan vertailukelpoisia.<\/p>\n\n\n\n<p>Maanalyysiss\u00e4 tietty m\u00e4\u00e4r\u00e4 uuttoliuosta (esim. Mehlich 3, AL- tai DL-menetelm\u00e4) lis\u00e4t\u00e4\u00e4n maaper\u00e4\u00e4n, sit\u00e4 ravistellaan tietyn ajan, ja liuokseen uutetut ravinteet mitataan.<\/p>\n\n\n\n<p>Vakioidut maaper\u00e4analyysit, jotka suositellaan teht\u00e4v\u00e4ksi noin viiden vuoden v\u00e4lein, mittaavat yleens\u00e4 K-, P-, Mg- ja Ca-pitoisuuksia mg\/kg.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>S\u00e4hk\u00f6njohtavuuden rooli maaper\u00e4n tiedoissa<\/strong><\/h2>\n\n\n\n<p>Kasviravinteet liikkuvat maaper\u00e4ss\u00e4 veden v\u00e4lityksell\u00e4, jossa ne ovat liuenneessa muodossa. T\u00e4m\u00e4 on kasvien juurille suoraan saatavilla oleva ravinnevarasto.<\/p>\n\n\n\n<p>Maaper\u00e4n huokosvedess\u00e4 olevat ionit vaikuttavat s\u00e4hk\u00f6njohtavuuteen, ja ionien kokonaism\u00e4\u00e4r\u00e4\u00e4 voidaan arvioida mittaamalla kyll\u00e4isen huokosveden s\u00e4hk\u00f6njohtavuutta. Paul-Tech-j\u00e4rjestelm\u00e4 perustuu juuri t\u00e4h\u00e4n ilmi\u00f6\u00f6n.<\/p>\n\n\n\n<p>Fosfori on yleens\u00e4 voimakkaasti sitoutunut maaper\u00e4n hiukkasiin, eik\u00e4 se ole vesiliukoisessa muodossa. Siksi sen liikkuvuus ei n\u00e4y s\u00e4hk\u00f6njohtavuusmittauksissa.<\/p>\n\n\n\n<p>T\u00e4rke\u00e4t kationit, kuten K\u207a, Mg\u00b2\u207a ja Ca\u00b2\u207a, sitoutuvat enemm\u00e4n tai v\u00e4hemm\u00e4n maaper\u00e4n rakenteeseen negatiivisesti varautuneiden kolloidihiukkasten kautta (kationinvaihtokapasiteetti, CEC).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Perinteinen maanalyysi vs. reaaliaikainen maaper\u00e4n mittaus<\/strong><\/h2>\n\n\n\n<p>Perinteisess\u00e4 maanalyysiss\u00e4 m\u00e4\u00e4ritet\u00e4\u00e4n mahdollisesti kasveille saatavilla olevien ravinteiden kokonaism\u00e4\u00e4r\u00e4 uuttoliuoksia k\u00e4ytt\u00e4en. T\u00e4m\u00e4 antaa pitk\u00e4n aikav\u00e4lin tietoa maaper\u00e4n ravinnevarannoista, mutta ei kuvaa reaaliaikaista tilannetta kasveille saatavilla olevista ravinteista.<\/p>\n\n\n\n<p>Paul-Tech-j\u00e4rjestelm\u00e4 puolestaan mittaa reaaliaikaisesti maaper\u00e4n liuoksessa olevien ravinteiden kokonaism\u00e4\u00e4r\u00e4\u00e4 s\u00e4hk\u00f6njohtavuuden perusteella. T\u00e4m\u00e4 antaa viljelij\u00e4lle tarkkaa tietoa kasvien k\u00e4ytett\u00e4viss\u00e4 olevista ravinteista juuri sill\u00e4 hetkell\u00e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Yhteenveto<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Maaper\u00e4n kokonaisravinnepitoisuus on 10\u2013100 kertaa suurempi kuin kasveille saatavilla oleva osuus.<\/li>\n\n\n\n<li>Perinteisiss\u00e4 maanalyysiss\u00e4 ravinteet uutetaan uuttoliuosten avulla, mutta ne eiv\u00e4t aina kerro, kuinka suuri osa ravinteista on kasveille heti hy\u00f6dynnett\u00e4viss\u00e4.<\/li>\n\n\n\n<li>Maanalyysimenetelm\u00e4t on kalibroitu lannoituskokeilla, ja ne soveltuvat parhaiten paikallisiin olosuhteisiin.<\/li>\n\n\n\n<li>Kasviravinteet liikkuvat maaper\u00e4n vesiliuoksessa, joten Paul-Tech-j\u00e4rjestelm\u00e4 antaa reaaliaikaista tietoa ravinteiden saatavuudesta kasvien juurialueella.<\/li>\n\n\n\n<li>Pitk\u00e4aikaisen maaper\u00e4n hedelm\u00e4llisyyden hallinnan kannalta laboratoriotutkimukset ovat v\u00e4ltt\u00e4m\u00e4tt\u00f6mi\u00e4, sill\u00e4 ne osoittavat ravinnevarannot, mukaan lukien ne, jotka eiv\u00e4t ole heti kasveille saatavilla.<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n","protected":false},"excerpt":{"rendered":"<p>Maanalyysi on arvokas ty\u00f6kalu maataloudessa, sill\u00e4 sen avulla voidaan valita sopivat viljelykasvit, arvioida maaper\u00e4n hedelm\u00e4llisyytt\u00e4 ja antaa lannoitussuosituksia. Luotettavien tietojen&#8230;<\/p>\n","protected":false},"author":3,"featured_media":2730,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-2729","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized-fi"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Maan\u00e4ytteet vs. maaper\u00e4aseman tiedot - Paul-Tech<\/title>\n<meta name=\"description\" content=\"Maan\u00e4ytteet vai maaper\u00e4aseman tiedot? 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