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Ali je vključevanje kadmija v biociklus na območju Mežiške doline že aktualno? : diplomska nalogaAmbrož, JanaV lončnem poskusu s kontaminirano vrtno zemljo iz okolice rudnika in topilnice Pb in Zn (Prevalje v Mežiški dolini), so bili raziskovani vplivi različnih organskih (goveji gnoj, brinove tropine, ... domači kompost, zrezana sveža detelja), anorganskih (P205, Ca0) in mešanih (vermikulit + kurji gnoj) dodatkov, na sprejem Cd v rastline in pridelke sveže snovi. Testni rastlini sta bili špinača in koruza. V karbonatnih vrtnih tleh s pH KCl 6,5, pH H20 7,1 in 6,1% organske snovi, je bilo ~10 ppm Cd. Najboljši rezultati so izmerjeni pri zadnjem postopku vermikulitu kot anorganskem ionskem izmenjevalcu skupaj z organskim dodatkom, kjer je bil pridelek sveže snovi povečan in znižana vsebnost Cd. Minimalno znižanje vsebnosti Cd je bilo tudi pri domačem kompostu, pri ostalih dodatkih je bil vnos še povečan v primerjavi s kontrolo (brez dodatka). Dodanost Cd se zelo poveča pod pH 5,6, zato je mehanizem dostopnosti in sprejema v alkalnih tleh razložen, s kislimi izločki iz korenin, tako da je pH v njihovi neposredni bližini znižan in Cd je lahko sprejet. Različne rastlinske vrste niso enako sposobne spreminjati pH, zato razlike v vsebnosti Cd pri enakih pogojih zelo variirajo. Z različnimi organskimi dodatki vsebnost Cd v rastlinah ni bistveno znižana, če pa, le začasno, saj je Cd vezan v odmrli mikrobiološki masi počasi sproščen, kajti z razkrajanjem organske snovi je pH znižan.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [J. Ambrož], 1990Language - slovenianCOBISS.SI-ID - 2216825
Author
Ambrož, Jana
Other authors
Furlan, Janez, 1924-2016
Topics
fiziologija rastlin |
tla |
pH tal |
kontaminacija tal |
kadmij |
sprejem v rastline |
toksičnost |
špinača |
koruza |
koruza
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Library | Call number – location, accession no. ... | Copy status |
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BF, Dept. of Agronomy, Lj. | AO D 1310 01 | available - outside loan, loan period: 1 months |
BF, Dept. of Agronomy, Lj. | AO D 1310 | available - reading room |
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Furlan, Janez, 1924-2016 | 00954 |
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