{"id":1535,"date":"2026-09-20T09:50:26","date_gmt":"2026-09-20T06:50:26","guid":{"rendered":"https:\/\/www.topcz.top\/?p=1535"},"modified":"2026-09-20T09:50:26","modified_gmt":"2026-09-20T06:50:26","slug":"aplikace-ukazuje-2-c-ale-zahon-muze-rano-zbelat-prizemni-mraz-vznika-nize-nez-meri-bezny-zahradni-teplomer","status":"publish","type":"post","link":"https:\/\/www.topcz.top\/?p=1535","title":{"rendered":"Aplikace ukazuje +2 \u00b0C, ale z\u00e1hon m\u016f\u017ee r\u00e1no zb\u011blat: p\u0159\u00edzemn\u00ed mr\u00e1z vznik\u00e1 n\u00ed\u017ee, ne\u017e m\u011b\u0159\u00ed b\u011b\u017en\u00fd zahradn\u00ed teplom\u011br"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Podzimn\u00ed r\u00e1na dok\u00e1\u017eou zahr\u00e1dk\u00e1\u0159e p\u0159ekvapit. P\u0159edpov\u011b\u010f po\u010das\u00ed ukazuje nap\u0159\u00edklad <strong>+2 \u00b0C<\/strong>, ale r\u00e1no je tr\u00e1va pokryt\u00e1 b\u00edlou jinovatkou a na z\u00e1honu se objevuj\u00ed prvn\u00ed zn\u00e1mky mrazu. Jak je to mo\u017en\u00e9?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u016fvodem je <strong>p\u0159\u00edzemn\u00ed mr\u00e1z<\/strong>, kter\u00fd se m\u016f\u017ee vytvo\u0159it p\u0159\u00edmo u povrchu p\u016fdy, zat\u00edmco b\u011b\u017en\u00fd teplom\u011br nebo meteorologick\u00e1 aplikace ukazuje teplotu nam\u011b\u0159enou ve v\u011bt\u0161\u00ed v\u00fd\u0161ce. Rozd\u00edl m\u016f\u017ee b\u00fdt pro citliv\u00e9 rostliny z\u00e1sadn\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pro\u010d m\u016f\u017ee b\u00fdt u zem\u011b mr\u00e1z, kdy\u017e aplikace ukazuje plusov\u00e9 teploty?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Teplota vzduchu nen\u00ed ve v\u0161ech v\u00fd\u0161k\u00e1ch stejn\u00e1. P\u0159edpov\u011bdi po\u010das\u00ed a b\u011b\u017en\u00e1 meteorologick\u00e1 m\u011b\u0159en\u00ed vych\u00e1zej\u00ed z teploty vzduchu m\u011b\u0159en\u00e9 ve standardn\u00ed v\u00fd\u0161ce, nikoli p\u0159\u00edmo n\u011bkolik centimetr\u016f nad p\u016fdou.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Za jasn\u00e9 a klidn\u00e9 noci p\u016fda postupn\u011b vyza\u0159uje teplo do okol\u00ed. Povrch p\u016fdy a p\u0159edm\u011bty t\u011bsn\u011b nad n\u00ed se mohou ochladit v\u00fdrazn\u011bji ne\u017e vzduch ve v\u00fd\u0161ce, kde se teplota b\u011b\u017en\u011b m\u011b\u0159\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Proto m\u016f\u017ee b\u00fdt nap\u0159\u00edklad ve v\u00fd\u0161ce m\u011b\u0159en\u00ed n\u011bkolik stup\u0148\u016f nad nulou, zat\u00edmco u povrchu p\u016fdy teplota klesne k bodu mrazu nebo i n\u00ed\u017ee.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Co p\u0159esn\u011b je p\u0159\u00edzemn\u00ed mr\u00e1z?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159\u00edzemn\u00ed mr\u00e1z ozna\u010duje situaci, kdy teplota v bezprost\u0159edn\u00ed bl\u00edzkosti zemsk\u00e9ho povrchu klesne pod 0 \u00b0C, p\u0159esto\u017ee teplota vzduchu ve standardn\u00ed v\u00fd\u0161ce z\u016fst\u00e1v\u00e1 nad bodem mrazu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nej\u010dast\u011bji se objevuje za <strong>jasn\u00fdch, such\u00fdch a bezv\u011btrn\u00fdch noc\u00ed<\/strong>. Pokud je obloha zata\u017een\u00e1, mraky \u010d\u00e1st tepeln\u00e9ho z\u00e1\u0159en\u00ed vracej\u00ed zp\u011bt k povrchu a ochlazov\u00e1n\u00ed b\u00fdv\u00e1 men\u0161\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Velkou roli hraje tak\u00e9 v\u00edtr. Za klidn\u00e9ho po\u010das\u00ed se u zem\u011b m\u016f\u017ee vytvo\u0159it v\u00fdrazn\u011bj\u0161\u00ed vrstva studen\u00e9ho vzduchu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pro\u010d jsou n\u00edzk\u00e9 z\u00e1hony ohro\u017een\u011bj\u0161\u00ed?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Studen\u00fd vzduch je hust\u0161\u00ed a m\u016f\u017ee se hromadit v ni\u017e\u0161\u00edch m\u00edstech ter\u00e9nu. Proto b\u00fdvaj\u00ed n\u00e1chyln\u011bj\u0161\u00ed k p\u0159\u00edzemn\u00edm mraz\u016fm nap\u0159\u00edklad prohlubn\u011b, dol\u00edky nebo n\u00ed\u017ee polo\u017een\u00e9 \u010d\u00e1sti zahrady.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Naopak m\u00edrn\u011b vyv\u00fd\u0161en\u00fd z\u00e1hon m\u016f\u017ee m\u00edt v n\u011bkter\u00fdch situac\u00edch lep\u0161\u00ed podm\u00ednky.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pokud tedy m\u00e1te na zahrad\u011b m\u00edsto, kde se pravideln\u011b objevuje jinovatka d\u0159\u00edve ne\u017e jinde, nen\u00ed to n\u00e1hoda. Mikroklima konkr\u00e9tn\u00edho stanovi\u0161t\u011b m\u016f\u017ee m\u00edt na teplotu u zem\u011b velk\u00fd vliv.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kdy je p\u0159\u00edzemn\u00ed mr\u00e1z nejpravd\u011bpodobn\u011bj\u0161\u00ed?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nejv\u011bt\u0161\u00ed pozornost si zaslou\u017e\u00ed noci, kdy se sejde n\u011bkolik podm\u00ednek:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>obloha je jasn\u00e1;<\/li>\n\n\n\n<li>v\u00edtr je slab\u00fd nebo t\u00e9m\u011b\u0159 nefouk\u00e1;<\/li>\n\n\n\n<li>vzduch je such\u00fd;<\/li>\n\n\n\n<li>b\u011bhem dne bylo relativn\u011b teplo;<\/li>\n\n\n\n<li>noc je dlouh\u00e1 a bez obla\u010dnosti.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V takov\u00e9 situaci m\u016f\u017ee povrch p\u016fdy b\u011bhem noci v\u00fdrazn\u011b vychladnout.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Proto nen\u00ed dobr\u00e9 sledovat pouze jednu hodnotu v aplikaci. D\u016fle\u017eit\u00e1 je tak\u00e9 p\u0159edpov\u011b\u010f obla\u010dnosti, v\u011btru a o\u010dek\u00e1van\u00fdch minim\u00e1ln\u00edch teplot.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Co znamen\u00e1 jinovatka na tr\u00e1v\u011b?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Jinovatka je jedn\u00edm z nejviditeln\u011bj\u0161\u00edch sign\u00e1l\u016f, \u017ee povrch b\u011bhem noci v\u00fdrazn\u011b vychladl.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pokud r\u00e1no vid\u00edte b\u00edlou jinovatku na tr\u00e1v\u011b, st\u0159e\u0161e auta nebo jin\u00fdch n\u00edzk\u00fdch povr\u0161\u00edch, znamen\u00e1 to, \u017ee teplota t\u011bchto povrch\u016f mohla klesnout pod bod mrazu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Neznamen\u00e1 to v\u0161ak automaticky, \u017ee cel\u00fd z\u00e1hon byl vystaven stejn\u011b siln\u00e9mu mrazu. R\u016fzn\u00e9 materi\u00e1ly a \u010d\u00e1sti zahrady se ochlazuj\u00ed r\u016fznou rychlost\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159esto je jinovatka u\u017eite\u010dn\u00fdm varov\u00e1n\u00edm, \u017ee citliv\u00e9 rostliny mohou b\u00fdt ohro\u017eeny.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kter\u00e9 rostliny chr\u00e1nit p\u0159ed p\u0159\u00edzemn\u00edm mrazem?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nejcitliv\u011bj\u0161\u00ed jsou teplomiln\u00e9 rostliny, kter\u00e9 je\u0161t\u011b z\u016fst\u00e1vaj\u00ed venku. Pat\u0159\u00ed mezi n\u011b nap\u0159\u00edklad raj\u010data, papriky, okurky nebo lilky.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pokud je p\u011bstujete je\u0161t\u011b na podzim a p\u0159edpov\u011b\u010f hl\u00e1s\u00ed chladnou noc, je vhodn\u00e9 sledovat situaci pozorn\u011bji ne\u017e u odoln\u00fdch podzimn\u00edch plodin.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Naopak \u0161pen\u00e1t, poln\u00ed\u010dek, kade\u0159\u00e1vek nebo n\u011bkter\u00e9 ko\u0159enov\u00e9 zeleniny sn\u00e1\u0161ej\u00ed ni\u017e\u0161\u00ed teploty podstatn\u011b l\u00e9pe.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Jak rostliny p\u0159ed p\u0159\u00edzemn\u00edm mrazem chr\u00e1nit?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">U citliv\u00fdch rostlin m\u016f\u017ee pomoci zahradnick\u00e1 netkan\u00e1 textilie. M\u011bla by b\u00fdt polo\u017eena tak, aby rostliny p\u0159\u00edli\u0161 nestla\u010dovala, a okraje je vhodn\u00e9 zajistit proti v\u011btru.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00fdhodou je, \u017ee ochrana m\u016f\u017ee b\u00fdt na noc nasazena a p\u0159es den, pokud se v\u00fdrazn\u011b otepl\u00ed, odstran\u011bna nebo odv\u011btr\u00e1na.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">U men\u0161\u00edch rostlin m\u016f\u017ee pomoci tak\u00e9 jednoduch\u00e9 zakryt\u00ed vhodn\u00fdm ochrann\u00fdm materi\u00e1lem. D\u016fle\u017eit\u00e9 je, aby pod krytem z\u016fstala dostate\u010dn\u00e1 cirkulace vzduchu a aby se p\u0159i del\u0161\u00edm pou\u017eit\u00ed nehromadila nadm\u011brn\u00e1 vlhkost.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nesta\u010d\u00ed se pod\u00edvat na teplom\u011br u domu<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u011b\u017en\u00fd zahradn\u00ed teplom\u011br um\u00edst\u011bn\u00fd na st\u011bn\u011b domu nebo na chr\u00e1n\u011bn\u00e9m m\u00edst\u011b nemus\u00ed p\u0159esn\u011b ukazovat podm\u00ednky p\u0159\u00edmo na z\u00e1honu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Teplota m\u016f\u017ee b\u00fdt jin\u00e1 u domu, na otev\u0159en\u00e9 tr\u00e1v\u011b, v n\u00edzk\u00e9 prohlubni nebo mezi rostlinami.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pokud chcete l\u00e9pe sledovat riziko p\u0159\u00edzemn\u00edho mrazu, m\u00e1 smysl um\u00edstit teplom\u011br nebo teplotn\u00ed senzor p\u0159\u00edmo do m\u00edsta, kter\u00e9 v\u00e1s zaj\u00edm\u00e1. Nem\u011bl by b\u00fdt vystaven p\u0159\u00edm\u00e9mu slunci ani um\u00edst\u011bn t\u011bsn\u011b u zdroje tepla.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pro\u010d jsou jasn\u00e9 podzimn\u00ed noci zr\u00e1dn\u00e9?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159es den m\u016f\u017ee b\u00fdt p\u0159\u00edjemn\u011b a teploty mohou dosahovat nap\u0159\u00edklad 15 \u00b0C. Po z\u00e1padu slunce se v\u0161ak situace rychle m\u011bn\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u016fda za\u010dne vyza\u0159ovat teplo a za jasn\u00e9 oblohy se ochlazuje rychleji. Pokud sou\u010dasn\u011b nefouk\u00e1, studen\u00fd vzduch se udr\u017euje p\u0159i povrchu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pr\u00e1v\u011b proto m\u016f\u017ee b\u00fdt rozd\u00edl mezi odpoledn\u00ed a rann\u00ed situac\u00ed velmi v\u00fdrazn\u00fd.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Co d\u011blat, kdy\u017e aplikace hl\u00e1s\u00ed +2 \u00b0C?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pokud p\u0159edpov\u011b\u010f ukazuje n\u011bkolik stup\u0148\u016f nad nulou, nen\u00ed nutn\u00e9 automaticky zakr\u00fdvat cel\u00fd z\u00e1hon. Z\u00e1le\u017e\u00ed na citlivosti rostlin a konkr\u00e9tn\u00edch podm\u00ednk\u00e1ch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jestli\u017ee v\u0161ak m\u00e1 b\u00fdt noc jasn\u00e1 a bezv\u011bt\u0159\u00ed a na zahrad\u011b se p\u0159\u00edzemn\u00ed mr\u00e1z objevuje pravideln\u011b, je rozumn\u00e9 citliv\u00e9 rostliny na noc preventivn\u011b chr\u00e1nit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Zvl\u00e1\u0161tn\u00ed pozornost v\u011bnujte mlad\u00fdm rostlin\u00e1m, \u010derstv\u011b vysazen\u00fdm sazenic\u00edm a plodin\u00e1m, kter\u00e9 \u0161patn\u011b sn\u00e1\u0161ej\u00ed chlad.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Z\u00e1v\u011br: Sledujte nejen p\u0159edpov\u011b\u010f, ale i samotnou zahradu<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Hodnota <strong>+2 \u00b0C v aplikaci neznamen\u00e1, \u017ee u zem\u011b mus\u00ed b\u00fdt tak\u00e9 +2 \u00b0C<\/strong>. Za jasn\u00e9 a klidn\u00e9 noci se povrch p\u016fdy a n\u00edzk\u00e9 rostliny mohou ochladit mnohem v\u00edce ne\u017e vzduch ve v\u00fd\u0161ce, kde se b\u011b\u017en\u011b m\u011b\u0159\u00ed teplota.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159\u00edzemn\u00ed mr\u00e1z proto m\u016f\u017ee p\u0159ij\u00edt i tehdy, kdy\u017e b\u011b\u017en\u00e1 p\u0159edpov\u011b\u010f je\u0161t\u011b nevaruje p\u0159ed klasick\u00fdm mrazem.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nejlep\u0161\u00ed ochranou je kombinovat p\u0159edpov\u011b\u010f po\u010das\u00ed s pozorov\u00e1n\u00edm vlastn\u00edho pozemku. Pokud se r\u00e1no pravideln\u011b objevuje jinovatka, m\u00e1te jasn\u00fd sign\u00e1l, \u017ee mikroklima zahrady se m\u016f\u017ee od \u00fadaj\u016f v aplikaci li\u0161it. U citliv\u00fdch rostlin pak m\u016f\u017ee jednoduch\u00e9 no\u010dn\u00ed zakryt\u00ed rozhodnout o tom, zda podzimn\u00ed \u00farodu je\u0161t\u011b zachr\u00e1n\u00edte.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Materi\u00e1l p\u0159ipravil redak\u010dn\u00ed t\u00fdm s vyu\u017eit\u00edm n\u00e1stroj\u016f um\u011bl\u00e9 inteligence. Ve\u0161ker\u00e9 informace byly p\u0159ed publikac\u00ed zkontrolov\u00e1ny a upraveny.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Podzimn\u00ed r\u00e1na dok\u00e1\u017eou zahr\u00e1dk\u00e1\u0159e p\u0159ekvapit. P\u0159edpov\u011b\u010f po\u010das\u00ed ukazuje nap\u0159\u00edklad +2 \u00b0C, ale r\u00e1no je tr\u00e1va pokryt\u00e1 b\u00edlou jinovatkou a na z\u00e1honu se objevuj\u00ed prvn\u00ed zn\u00e1mky mrazu. Jak je to mo\u017en\u00e9? [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":1536,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1535","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dvorek"],"_links":{"self":[{"href":"https:\/\/www.topcz.top\/index.php?rest_route=\/wp\/v2\/posts\/1535","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.topcz.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.topcz.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.topcz.top\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.topcz.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1535"}],"version-history":[{"count":1,"href":"https:\/\/www.topcz.top\/index.php?rest_route=\/wp\/v2\/posts\/1535\/revisions"}],"predecessor-version":[{"id":1537,"href":"https:\/\/www.topcz.top\/index.php?rest_route=\/wp\/v2\/posts\/1535\/revisions\/1537"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.topcz.top\/index.php?rest_route=\/wp\/v2\/media\/1536"}],"wp:attachment":[{"href":"https:\/\/www.topcz.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1535"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.topcz.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1535"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.topcz.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1535"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}