Calitatea rasadurilor de legume

150116_calitatea rasadurilorPentru a obtine culturi legumicole de calitate, in primul rand trebuie sa pornim cu un start bun, acest start bun fiind reprezentat de niste rasaduri de o calitate superioara.

Pe langa asigurarea conditiilor de mediu optime si protectia fitosanitara a tinerelor plantute impotriva bolilor si daunatorilor, producatorii de legume trebuie sa aiba in vedere si aprovizionarea suficienta cu substante nutritive a plantelor. Tinand cont ca o mare parte dintre rasaduri se produc in substraturi profesionale – turba – ce contine o cantitate limitata de ingrasaminte, nu trebuie neglijata fertilizarea, in special la culturile la care durata producerii rasadului este mai mare.

O situatia speciala dintre substantele nutritive o prezinta fosforul, pentru ca la temperaturi mai scazute, nu este disponibil plantelor. Aceasta lipsa a fosforului apare de multe ori dupa transplantare, tocmai intr-un moment in care tinerele plantute au foarte mare nevoie de el, deoarece fosforul are un rol important in dezvoltarea sistemului radicular al plantelor. In general, nu trebuie asteptata aparitia simptomelor de carenta vizuale, deoarece in acel moment plantele deja sufera de absenta acelui tip de hrana. Trebuie actionat si pe baza experientelor anterioare.

Carenta de fosfor se manifesta prin intarzierea cresterii, ramificare redusa, sistemul radicular slab dezvoltat si coacere intarziata. Plantele afectate de carenta in fosfor prezinta o pigmentare (antocian) rosie violacee a frunzelor si tulpinilor. Insuficienta fosfatului in cloroplaste reduce procesul de fotosinteza. Din cauza faptului ca sinteza acidului ribonucleic (ARN) este redusa, sinteza proteinelor este, de asemenea, redusa.

Pentru a evita aparitie simptomelor vizuale ale carentei de fosfor recomandam aplicarea produsului MAGIC P STAR. MAGIC P STAR este un fertilizant mineral lichid care garanteaza o disponibilitate maxima a elementelor nutritive pe durata celor mai sensibile faze de dezvoltare. Formularea sa speciala cu fosfor, magneziu, fier, si zinc asigura un efect ”starter” chiar și la temperaturi sau luminozitate scazute, datorită efectelor sale pozitive asupra dezvoltării radacinilor. MAGIC P STAR se poate aplica atât foliar cât și prin fertigare după transplantarea plantelor sau în timpul înfloritului.

Un alt fenomen de care ne putem lovi in producerea unor rasaduri sanatoare il reprezinta alungirea rasadurilor. Principalii factori care pot determina aparitia acestui fenome sunt lumina insuficienta, temperaturile prea ridicate sau lipsa corelatiei dintre lumina si temperatura, umiditatea in exces. In anumite situatii poate fi si excesul de azot. Prevenirea aparitiei acestui fenomen de poate face prin dirijarea corect a a factorilor de vegetatie (lumina, caldura, apa, fertilizare) si ca o masura de ajutor mai poate fi aplicat produsul ALGAREN TWIN. Acest produs prin aplicare foliara sau prin udare ajuta la o inradacinare mai puternica a rasadurilor si reduce distanta dintre internoduri. Prin reducerea distantei dintre internoduri se mentin plantele mai scurte nepermitandu-le sa se alungeasca.

ALGAREN TWIN contine auxine si citochinine intr-un raport specific ce stimuleaza plantele sa produca citochinine endogene, care induc radacinarea si o legare a fructelor mai abundenta. Produsul se mai poate folosi si pentru imersia radacinilor (cuburilor nutritive) a rasadurilor intr-o solutie de 0.2-0.4%.

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