{"id":2973,"date":"2025-04-11T08:54:05","date_gmt":"2025-04-11T08:54:05","guid":{"rendered":"https:\/\/paul-tech.com\/?p=2973"},"modified":"2026-03-12T15:48:26","modified_gmt":"2026-03-12T15:48:26","slug":"augalu-mityba-ir-nitrato-no3-matavimas-per-elektrinius-indikatorius","status":"publish","type":"post","link":"https:\/\/paul-tech.com\/lt\/augalu-mityba-ir-nitrato-no3-matavimas-per-elektrinius-indikatorius\/","title":{"rendered":"Augal\u0173 mityba ir nitrato (NO3) matavimas per elektrinius indikatorius"},"content":{"rendered":"<div class=\"wp-block-post-date\"><time datetime=\"2025-04-11T08:54:05+00:00\">April 11, 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 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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 loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"598\" src=\"https:\/\/paul-tech.com\/wp-content\/uploads\/2024\/10\/pexels-renate-191279002-11489216-2-1.jpg\" alt=\"\" class=\"wp-image-2299\" srcset=\"https:\/\/paul-tech.com\/wp-content\/uploads\/2024\/10\/pexels-renate-191279002-11489216-2-1.jpg 900w, https:\/\/paul-tech.com\/wp-content\/uploads\/2024\/10\/pexels-renate-191279002-11489216-2-1-300x199.jpg 300w, https:\/\/paul-tech.com\/wp-content\/uploads\/2024\/10\/pexels-renate-191279002-11489216-2-1-768x510.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/figure>\n\n\n\n<p>Augalai sugeria maistines med\u017eiagas i\u0161 dirvo\u017eemio tirpalo \u012fvairiais procesais. Supaprastintai, jie suskirstomi \u012f tris tipus: masin\u012f sraut\u0105, difuzij\u0105 ir s\u0105lyt\u012f. \u0160i\u0173 proces\u0173 supratimas yra esminis \u016bkininkams, siekiantiems optimizuoti tr\u0119\u0161im\u0105 ir gerinti derli\u0173. \u0160iame \u012fra\u0161e paai\u0161kinsime, kaip veikia \u0161ie maistini\u0173 med\u017eiag\u0173 pasisavinimo mechanizmai ir kokie veiksniai lemia j\u0173 efektyvum\u0105.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Augal\u0173 maistini\u0173 med\u017eiag\u0173 pasisavinimo mechanizmai<\/strong><\/h2>\n\n\n\n<p>Augalai sugeria dirvo\u017eemio maistines med\u017eiagas trimis pagrindiniais procesais:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Masinis srautas yra procesas<\/strong>, kai augalas \u012fsisavina dirvo\u017eemio vanden\u012f transpiracijos metu kartu su i\u0161tirpusiomis maistin\u0117mis med\u017eiagomis. Per \u0161\u012f proces\u0105 augalai \u012fsisavina 99 % reikalingo azoto kaip lengvai judant\u012f nitrato (NO3-) jon\u0105, o tik apie 20 % kalio (K). Kadangi NO3- jonai yra neigiamai \u012fkrauti, jie n\u0117ra paveikti neigiamo dirvo\u017eemio daleli\u0173 \u012fkrovimo, tod\u0117l jie visi\u0161kai i\u0161tirpsta ir yra labai judr\u016bs dirvo\u017eemio vandenyje.<\/li>\n\n\n\n<li><strong>Difuzija yra procesas<\/strong>, kai maistin\u0117s med\u017eiagos (labai l\u0117tai) juda \u012f \u0161akn\u0173 zon\u0105 d\u0117l koncentracijos skirtum\u0173. Per difuzij\u0105 augalai \u012fsisavina didel\u0119 dal\u012f reikalingo kalio (K) ir daugum\u0105 mikroelement\u0173. Maistini\u0173 med\u017eiag\u0173 katijonai yra priri\u0161ti prie neigiam\u0173 dirvo\u017eemio koloidini\u0173 daleli\u0173 pavir\u0161iaus (molio dalel\u0117s, organin\u0117s med\u017eiagos), ir \u0161i\u0173 katijon\u0173 jud\u0117jim\u0105 tarp dirvo\u017eemio daleli\u0173, dirvo\u017eemio vandens ir augalo smarkiai veikia dirvo\u017eemio tekst\u016bra, katijon\u0173 main\u0173 talpa (CEC), dr\u0117gm\u0117 ir temperat\u016bra. Dauguma fosforo (P) taip pat absorbuojama per difuzij\u0105, nes jis yra labai nejudrus ir paprastai netirpus vandenyje, o jo pasisavinimas susij\u0119s su chemin\u0117mis reakcijomis ir dirvo\u017eemio pH lygiu.<\/li>\n\n\n\n<li><strong>Tiesioginis s\u0105lytis yra procesas<\/strong>, kai augalo \u0161aknys tiesiogiai kontaktuoja su dirvo\u017eemio maistin\u0117mis med\u017eiagomis. Jo vaidmuo bendroje mityboje yra nedidelis, nes \u0161akn\u0173 pavir\u0161ius lie\u010diasi tik su 1\u20132 % viso dirvo\u017eemio daleli\u0173 pavir\u0161iaus ploto.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Antrin\u0117s maistin\u0117s med\u017eiagos ir aplinkos veiksniai<\/strong><\/h2>\n\n\n\n<p>Tokios antrin\u0117s maistin\u0117s med\u017eiagos kaip magnis (Mg) ir kalcis (Ca) yra smarkiai priklausomos nuo dirvo\u017eemio dr\u0117gm\u0117s. Esant dideliam dr\u0117gm\u0117s kiekiui, masinis tek\u0117jimas yra pagrindinis mechanizmas; esant ma\u017eai dr\u0117gmei, didesn\u012f vaidmen\u012f vaidina difuzija. Magnis ir kalcis yra svarb\u016bs main\u0173 katijonai, ir j\u0173 buvimas dirvo\u017eemyje \u2013 tiek tirpale, tiek suri\u0161tas su dirvo\u017eemio pavir\u0161iais \u2013 priklauso nuo dirvo\u017eemio tekst\u016bros, CEC vert\u0117s, dr\u0117gm\u0117s kiekio ir temperat\u016bros. D\u0117l to Mg ir Ca koncentracija dirvo\u017eemio tirpale i\u0161lieka santykinai pastovi, prisidedant prie pradini\u0173 maistini\u0173 med\u017eiag\u0173 lygio (INL), kuris matuojamas ankstyv\u0105 pavasar\u012f be tr\u0105\u0161\u0173, ta\u010diau reik\u0161mingai nekinta per augimo sezon\u0105. Dirvo\u017eemio vanduo veikia kaip main\u0173 katijon\u0173 buferis, stabilizuojantis jon\u0173 koncentracij\u0105 tirpale ir u\u017ekertantis keli\u0105 greitiems dirvo\u017eemio tirpalo elektrinio laidumo poky\u010diams.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Azoto vaidmuo augal\u0173 augime<\/strong><\/h2>\n\n\n\n<p>Svarbiausia augal\u0173 makroelementin\u0117 maistin\u0117 med\u017eiaga \u2013 azotas \u2013 absorbuojama nitrato (NO3-) pavidalu. NO3-N yra labai judri ir greitai judanti maistin\u0117 med\u017eiaga \u2013 ji arba pasisavinama augalo, arba nuteka su dirvo\u017eemio vandens jud\u0117jimu. Paul-Tech (PT) maistini\u0173 med\u017eiag\u0173 indikatoriai per augimo sezon\u0105, palyginus su INL verte, pagrinde kinta d\u0117l NO3-N, ir jo dinamika leid\u017eia kiekybi\u0161kai \u012fvertinti i\u0161tirpusio ir augalams prieinamo NO3-N kiek\u012f dirvo\u017eemyje, i\u0161reik\u0161t\u0105 mg\/kg arba kg\/ha viso augimo sezono metu.<\/p>\n\n\n\n<p>Amonio azotas (NH4+) yra dirvo\u017eemyje kaip katijonas, kuris yra labai nejudrus ir prisiri\u0161\u0119s prie dirvo\u017eemio strukt\u016br\u0173, tod\u0117l ma\u017eai prisideda prie elektrinio laidumo. Amonio azotas (ir dirvo\u017eemyje esantis organinis azotas) tampa prieinamas augalams tik po nitrifikacijos proceso, kur\u012f atlieka dirvo\u017eemio bakterijos, paver\u010dian\u010dios j\u012f \u012f NO3-. Tada jis tiesiogiai atsispindi PT maistini\u0173 med\u017eiag\u0173 indikatoriuose, ir nitrifikacijos procesas, \u012fskaitant pagaminamo NO3-N kiek\u012f (kg\/ha), gali b\u016bti stebimas PT maistini\u0173 med\u017eiag\u0173 grafikuose.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Elektriniai dirvo\u017eemio indikatoriai<\/strong><\/h2>\n\n\n\n<p>Tarp antrini\u0173 maistini\u0173 med\u017eiag\u0173, sieros (SO4\u00b2\u207b) jonai taip pat smarkiai veikia elektrinius matavimus. Pana\u0161iai kaip NO3-, sulfato anijonai n\u0117ra paveikti elektri\u0161kai \u012fkraut\u0173 dirvo\u017eemio daleli\u0173 pavir\u0161i\u0173 ir yra judr\u016bs dirvo\u017eemio tirpale. NO3 ir SO4 poveikis PT maistini\u0173 med\u017eiag\u0173 indikatoriams gali b\u016bti vertinamas pagal naudojamas tr\u0105\u0161as.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Fosforas ir jo ribotas judrumas<\/strong><\/h2>\n\n\n\n<p>Fosforas (P) yra labai nejudri ir netirpi maistin\u0117 med\u017eiaga, tod\u0117l jos jud\u0117jimas (labai l\u0117tas) dirvo\u017eemyje ir pasisavinimas augal\u0173 tiesiogiai neatsispindi dirvo\u017eemio tirpalo elektriniame laidume ar Paul-Tech maistini\u0173 med\u017eiag\u0173 indikatoriuose.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Santrauka<\/strong><\/h2>\n\n\n\n<p>Paul-Tech maistini\u0173 med\u017eiag\u0173 indikatorius apima visas \u0161iuo metu dirvo\u017eemio tirpale esan\u010dias maistines med\u017eiagas. Skirting\u0173 element\u0173 \u012ftaka \u0161iam indikatoriui apra\u0161oma pagal j\u0173 ind\u0117l\u012f \u012f mas\u0117s tek\u0117jimo mechanizm\u0105. Pradinio maistini\u0173 med\u017eiag\u0173 lygis (INL) apib\u016bdina dirvo\u017eemio derlingum\u0105 arba bendr\u0105 maistini\u0173 med\u017eiag\u0173 kiek\u012f be papildomo mineralinio azoto (NO3) ir yra dirvo\u017eemio savyb\u0117, kuri per augimo sezon\u0105 reik\u0161mingai nesikei\u010dia.<\/p>\n\n\n\n<p>Maistini\u0173 med\u017eiag\u0173 indikatori\u0173 dinamika augimo sezono metu daugiausia priklauso nuo NO3-N kiekio poky\u010di\u0173 d\u0117l tr\u0105\u0161\u0173 i\u0161tirpimo dirvo\u017eemyje, augal\u0173 pasisavinimo ar i\u0161siplovimo. Remiantis Paul-Tech maistini\u0173 med\u017eiag\u0173 indikatoriais ir grafikais, dirvo\u017eemyje esan\u010dio NO3-N kiekis gali b\u016bti kiekybi\u0161kai \u012fvertintas mg\/kg arba kg\/ha. Tr\u0105\u0161ose esan\u010dio SO4 kiekio ir jo poky\u010diai taip pat atsispindi maistini\u0173 med\u017eiag\u0173 indikatori\u0173 rodmenyse.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Augalai sugeria maistines med\u017eiagas i\u0161 dirvo\u017eemio tirpalo \u012fvairiais procesais. Supaprastintai, jie suskirstomi \u012f tris tipus: masin\u012f sraut\u0105, difuzij\u0105 ir s\u0105lyt\u012f&#8230;.<\/p>\n","protected":false},"author":3,"featured_media":2299,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[25],"tags":[],"class_list":["post-2973","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized-lt"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Augal\u0173 mityba ir nitrato (NO3) matavimas per elektrinius indikatorius - Paul-Tech<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/paul-tech.com\/lt\/augalu-mityba-ir-nitrato-no3-matavimas-per-elektrinius-indikatorius\/\" \/>\n<meta property=\"og:locale\" content=\"lt_LT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Augal\u0173 mityba ir nitrato (NO3) matavimas per elektrinius indikatorius - Paul-Tech\" \/>\n<meta property=\"og:description\" content=\"Augalai sugeria maistines med\u017eiagas i\u0161 dirvo\u017eemio tirpalo \u012fvairiais procesais. 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