{"id":6291,"date":"2021-04-29T13:50:40","date_gmt":"2021-04-29T11:50:40","guid":{"rendered":"https:\/\/dnipola.kpodr.pl\/?p=6291"},"modified":"2021-04-30T11:41:31","modified_gmt":"2021-04-30T09:41:31","slug":"oziminy-pod-koniec-tegorocznego-zimnego-kwietnia","status":"publish","type":"post","link":"https:\/\/dnipola.kpodr.pl\/?p=6291","title":{"rendered":"OZIMINY pod koniec tegorocznego, zimnego kwietnia"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\"  style='background-color: #ffffff;background-position: center center;background-repeat: no-repeat;padding-top:-30px;padding-right:0px;padding-bottom:0px;padding-left:0px;'><div class=\"fusion-builder-row fusion-row \"><div  class=\"fusion-layout-column fusion_builder_column fusion_builder_column_1_1 fusion-builder-column-0 fusion-one-full fusion-column-first fusion-column-last 1_1\"  style='margin-top:0px;margin-bottom:20px;'><div class=\"fusion-column-wrapper\" style=\"padding: 0px 0px 0px 0px;background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;\"   data-bg-url=\"\"><div class=\"fusion-text\"><p>Relatywnie niskie temperatury w kwietniu br. Ostatnio wyst\u0119puj\u0105ce przymrozki znacznie spowolni\u0142y tempo proces\u00f3w wzrostowo-rozwojowych u rzepaku ozimego i ozimych form zb\u00f3\u017c. Rzepak ozimy, w zale\u017cno\u015bci od warunk\u00f3w stanowiska, znajduje si\u0119 w na og\u00f3\u0142 w fazie wzrostu p\u0119du g\u0142\u00f3wnego (BBCH 32-39), a ten z wcze\u015bniejszych siew\u00f3w zaczyna ju\u017c nawet, przy stosunkowo niskim p\u0119dzie g\u0142\u00f3wnym, wchodzi\u0107 w kolejna faz\u0119 tj p\u0105kowania (BBCH 50). Intensywne tworzenie podziemnej oraz nadziemnej biomasy ro\u015blinnej, w tym organ\u00f3w generatywnych zwi\u0119ksza zapotrzebowanie ro\u015blin na wod\u0119 i sk\u0142adniki pokarmowe. Dlatego jest teraz czas na pog\u0142\u00f3wne nawo\u017cenie kolejn\u0105 dawk\u0105 azotu (mocznik) najlepiej w towarzystwie magnezu i siarki (siarczan magnezu). Celowym jest w tym czasie (co najmniej dwukrotne) dolistne dokarmianie ro\u015blin mikroelementami, zw\u0142aszcza borem, manganem i molibdenem. Mikroelementy te, opr\u00f3cz wp\u0142ywu na efektywniejsze, bie\u017c\u0105ce pobieranie makrosk\u0142adnik\u00f3w, b\u0119d\u0105 stymulowa\u0142y odporno\u015b\u0107 ro\u015blin oraz prawid\u0142owy rozw\u00f3j organ\u00f3w generatywnych w okresie p\u0105kowania, kwitnienia i zawi\u0105zywania \u0142uszczyn.<\/p>\n<p>Po 15 kwietnia, zbo\u017ca ozime w spos\u00f3b naturalny wesz\u0142y w faz\u0119 strzelania w \u017ad\u017ab\u0142o \u2013 przy czym stopie\u0144 jej zaawansowania na polach jest bardzo r\u00f3\u017cny, warunkowany zr\u00f3\u017cnicowaniem terminu siewu ozimin (niekiedy p\u00f3\u017anym, jesiennym) jak przebiegiem tegorocznej pogody. Obecnie dla ozimin nast\u0105pi\u0142 okres krytyczny w zapotrzebowaniu na wod\u0119 i sk\u0142adniki pokarmowe \u2013 w fazie strzelania w \u017ad\u017ab\u0142o nast\u0119puje intensywny przyrost biomasy i kszta\u0142tuje si\u0119 ostateczna liczba k\u0142os\u00f3w, w tym k\u0142osk\u00f3w w k\u0142osie i liczba kwiatk\u00f3w w pojedynczym k\u0142osku, z kt\u00f3rych tworz\u0105 si\u0119 ziarniaki. Obecnie nale\u017cy wi\u0119c dostarczy\u0107 druga dawk\u0119 azotu. Nie nale\u017cy zapomina\u0107 r\u00f3wnie\u017c o dokarmiania ro\u015blin mikroelementami, zw\u0142aszcza miedzi\u0105, cynkiem i manganem. Faza strzelania w \u017ad\u017ab\u0142o to r\u00f3wnie\u017c czas, w kt\u00f3rym nale\u017cy wzmocni\u0107 p\u0119dy ro\u015blin, zw\u0142aszcza na stanowiska dobrych i przy wysokim nawo\u017ceniu azotowym. W tym celu nale\u017cy zastosowa\u0107 regulatory wzrostu zawieraj\u0105ce np. trineksapak etylu, kt\u00f3rych walorem jest d\u0142ugi okres mo\u017cliwego terminu aplikacji \u2013 od ko\u0144ca krzewienia do pojawienia si\u0119 li\u015bcia flagowego.<\/p>\n<p>Zbo\u017ca jare, kt\u00f3re w tym roku, przy zimnej jak na razie wio\u015bnie wyd\u0142u\u017cy\u0142y okres wschod\u00f3w, a og\u00f3\u0142 ko\u0144cz\u0105 faz\u0119 szpilkowania i tworz\u0105 2. li\u015b\u0107.<\/p>\n<p style=\"text-align: right;\">dr hab. in\u017c. 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