178 research outputs found
MORPHOLOGICALANALYSES OF THE GRAFTING UNION BY USING DIFFERENTWALNUT GRAFTING PROCEDURES (Juglans regia L.)
No full textV drevesnici Žižek smo v letih 2007 in 2008 izvedli poskus cepljenja oreha sorte \u27Šejnovo\u27, pri tem pa vrednotili
razlièno debelino podlag in cepièev ter razlièno dolžino le-teh (eno-nodijski, dvo-nodijski cepiè). V
prvi poskus smo vkljuèili 8 razliènih obravnavanj: (1) strojno omega 1 sistem (eno oko) tanki cepiè (O1-T), (2)
strojno omega 1 sistem (eno oko) debeli cepiè (O1-D), (3) strojno omega 2 sistem (dve oèesi) tanki cepiè
(O2-T), (4) strojno omega 2 sistem (dve oèesi) debeli cepiè (O2-D), (5) strojno lamela tanki cepiè (L-T), (6)
strojno lamela debeli cepiè (L-D), (7) roèno tanki cepiè (R-T), (8) roèno debeli cepiè (R-D). V drugi poskus
smo vkljuèili 6 razliènih obravnavanj, pri katerem smo dodali strojno lamela 2 sistem (dve oèesi) tanki
cepiè (L2-T), strojno lamela 2 sistem (dve oèesi) debeli cepiè (L2-D), roèno 2 sistem (dve oèesi) tanki cepiè
(R2-T), roèno 2 sistem (dve oèesi) debeli cepiè (R2-D) in odvzeli strojno omega 1 sistem (eno oko) tanki cepiè
(O1-T), strojno omega 1 sistem (eno oko) debeli cepiè (O1-D), strojno lamela 1 sistem tanki cepiè (L1-T),
strojno lamela 1 sistem debeli cepiè (L1-D), roèno tanki cepiè 1 sistem (R1-T), roèno debeli cepiè 1 sistem
(R1-D). Na podlagi dobljenih rezultatov je uspešnost cepljenja pri omega in lamelnem naèinu cepljenja z
enim oèesom veèja ob uporabi debelejših cepièev in podlag (12-16 mm). Pri uporabi omega naèina z razlièno
debelino podlag priporoèamo uporabo dvonodijskih cepièev. Za zanesljivo proizvodnjo sadik cepljenega
oreha ne glede na dolžino in debelino cepièev ter podlag priporoèamo uporabo angleške kopulacije.In the years 2007 and 2008 we performed a grafting experiment on the walnut kind \u27Šejnovo\u27 by using
different grafting procedures that involve groundings and scions of different thickness, and scions of different
length (one-nodal, two-nodal scions). The experiment was carried out in the Žižek tree nursery with
the purpose of determining the success of the \u27Šejnovo\u27 walnut grafting procedure. The first experiment
included 8 different treatments: (1) the mechanical omega 1 system (one-eye) thin scion (O1-T), (2) the
mechanical omega 1 system (one-eye) thick scion (O1-D), (3) the mechanical omega 2 system (two-eye)
thin scion (O2-T), (4) the mechanical omega 2 system (two-eye) thick scion (O2-D), (5) mechanical lamella thin
scion (L-T), (6) mechanical lamella thick scion (L-D), (7) manual thin scion (R-T), (8) manual thick scion
(R-D). The second experiment includes 6 different treatments including the mechanical lamella 2 system
(two-eye) thin scion (L2-T), mechanical lamella 2 system (two-eye) thick scion (L2-D), manual 2 system
(two-eye) thin scion (R2-T), manual 2 system (two-eye) thick scion (R2-D) and excluding the mechanical
omega 1 system (one-eye) thin scion (O1-T), the mechanical omega 1 system (one-eye) thick scion (O1-D),
mechanical lamella 1 system thin scion (L1-T), mechanical lamella 1 system thick scion (L1-D), manual
thin scion 1 system (R1-T), manual thick scion 1 system (R1-D). Based on the obtained results the one-eye
omega and lamella grafting procedures were more successful when carried out with thicker scions and
groundings (12-16 mm). When using omega grafting procedures with groundings of different thickness we
recommend the use of two-nodal scions. For a more reliable production of grafted walnut plants,
regardless of the length and thickness of scions and groundings, we recommend the English copulation
The impact of sulfur fertilization on yield and the content of pigments and some secondary metabolites in the shallot bulbs (Allium cepa var. aggregatum G. Don.))
No full textNamen magistrske naloge je bil ugotoviti, kako gnojenje z žveplom vpliva na količino pridelka, kakovost čebulic in vsebnost nekaterih sekundarnih metabolitov v čebulicah šalotke. V poskus smo vključili dve sorti (‘Golden Gourmet’ in ‘Red Sun’), ki se med seboj razlikujeta po barvi luskolistov čebulic. Poskus je potekal od marca do julija 2016 na laboratorijskem polju BF in je bil zasnovan v split-plot zasnovi v 4 ponovitvah (blokih). V poskus smo vključili 3 obravnavanja z gnojenjem (N0S0 (negnojeno), N120S0 (KAN, Hiperkorn 0:26:0 in KCl) in N120S65 (KAN, Hiperkorn 0:26:0 in K2SO4), ki so bila naključno razporejena na glavnih parcelah, na podparcelah pa smo razporedili sorti. Merili smo količino pridelka, kakovost čebulic, maso gnezda, vsebnost suhe snovi v čebulici in vsebnost antocianov in flavonolov. Rastline iz obravnavanja N120S65 so imele značilno večji pridelek (pri sorti \u27Red Sun\u27 19,1 t/ha in pri \u27Golden Gourmet\u27 12,3 t/ha) glede na obravnavanji N120S0 (15,7 t/ha \u27Red Sun\u27 in 9,7 t/ha \u27Golden Gourmet\u27) in N0S0 (13,4 t/ha \u27Red Sun\u27 in 9,6 t/ha \u27Golden Gourmet\u27). Rastline iz obravnavanja N120S65, so imele večjo maso posameznega gnezda (96,4 g) glede na ostali dve obravnavanji (N0S0 (85,3 g/gnezdo) in N120S65 (69,1 g/gnezdo). Gnojenje z N in S je pri sorti \u27Red Sun\u27 vplivalo na večji delež čebulic s premerom večjim od 5,5 cm glede na ostali obravnavanji. V čebulicah šalotke \u27Red Sun\u27, ki ima rdečo barvo luskolistov, smo ugotovili prisotnost derivatov cianidina. Največ je bilo cianidin-3(-6\u27\u27-malonilglukozida), sledi cianidin-3-malonil-laminaribiozid, katerega vsebnost je bila v čebulicah, gnojenih z N manjša glede na ostala obravnavanja. V čebulicah smo ugotovili prisotnost 11 flavonolov, med katerimi je bilo največ kvercetin dihekzosida 3. Gnojenje samo z N in z N in S je značilno zmanjšalo vsebnost flavonolov v čebulicah šalotke.The aim of the master’s thesis was to determine how sulfur fertilization influences the amount of yield and bulbs quality, as well as the content of some secondary metabolites in the bulb of the shallot. Two varieties were included in the experiment (‘Golden Gourmet’ and ‘Red Sun’), which are different in color of the bulbs. The experiment was conducted from March until July 2016 on the Laboratory field of the Biotechnical Faculty and was designed in split-plot design with 4 repetitions (blocks). On the main plot the fertilization treatments (N0S0 (not fertilized), N120S0 (KAN, Hiperkorn 0:26:0 and KCl) and N120S65 (KAN, Hiperkorn 0:26:0 and K2SO4)) were randomly arranged and varieties were arranged on the subplots. The yield of shallots, the quality of shallot bulbs and the weight of bulb cluster, bulbs dry matter and the amount of anthocyanins and flavonols. Fertilization with nitrogen and sulfur (N120S65) significantly increased the yield (\u27Red Sun\u27 19.1 t/ha and \u27Golden Gourmet\u27 12.3 t/ha) according to control treatment (N0S0) (13.4 t/ha \u27Red Sun\u27 and 9.6 t/ha \u27Golden Gourmet\u27) and nitrogen fertilization (N120S0) (15.7 t/ha \u27Red Sun\u27 and 9.7 t/ha \u27Golden Gourmet\u27). Plants of shallots, from N120S65 treatment had a larger mass of clusters (96.4 g) according to treatments N0S0 (85.3 g) and N120S65 (69.1 g). Fertilization with N and S in the \u27Red Sun\u27 varieties affected a larger proportion of bulbs with a diameter greater than 5.5 cm according to other treatments. The highest content of cyanidin-3(-6\u27\u27-malonylglucoside) anthocyanin was found in all three treatments, followed by cyanidin 3-malonil-lamynaribiozid, the amount of which was lower in bulbs from N120S0 treatment accorgding to other treatments. In bulbs of both varieties, 11 flavonols were detected, and the highest concentration of quercetin dihexoside 3 was found. Fertilization with N and S significantly decreased the content of flavonols in shallot bulbs in comparison with unfertilized, control plants
Impact of different autumn dates for planting shallot (Allium ascalonicum L.) on the quality and quantity of crop
No full textPoskus je bil izveden na laboratorijskem polju Biotehniške fakultete v Ljubljani, kjer smo od 22. oktobra 2018 do julija 2019 preizkušali možnost sajenja šalotke v jesenskem terminu. Do sedaj uveljavljen način spomladanskega sajenja šalotke je že kar nekaj zadnjih pomladi otežen zaradi ponavljajočih deževnih obdobij v spomladanskem terminu sajenja. Predhodni poskusi so pokazali, da je moč šalotko saditi tudi jeseni, vendar je potrebno preveriti katero okno je najbolj optimalno. V poskus smo vključili dve najbolj razširjeni sorti šalotke pri nas (\u27Red Sun\u27 in \u27Golden Gourmet\u27), ki smo ju sadili v treh različnih jesenskih terminih na prostem (22. oktober, 5. november in 19. november). Preživelost rastlin je bila med sortama precej različna, medtem, ko so razlike med termini sajenja manjše. Število cvetnih stebel je bilo glede na sorto in termin sajenja različno. Število razvitih čebulic na gnezdo se je med sortama in termini razlikovalo in je bilo večje pri sorti \u27Golden Gourmet\u27. Večji pridelek smo dobili pri sorti \u27Red Sun\u27, kjer je največji pridelek znašal 32,1 t/ha. Pri sorti \u27Golden Gourmet\u27 je največji pridelek znašal 19,3 t/ha. Pri sorti \u27Red Sun\u27 je bil večji delež preživelih rastlin pri vseh terminih sajenja kot pri sorti \u27Golden Gourmet\u27, največji je bil tako (83 %) pri 3. terminu sajenja in tudi povprečno skupno število čebulic/parcelo (88,3 %) je bilo največje pri sorti \u27Red Sun\u27 v 2. terminu sajenja. Delež čebulic po velikostnih razredih je bil največji (53 %) v 3. terminu sajenja in v tretjem velikostnem razredu. Pri sorti \u27Golden Gourmet\u27 pa je bil največji delež (69 %) v 3. terminu sajenja in v velikostnem razredu 2, kjer imajo čebulčki premer od 3 do 5 cm.The experiment took place on the laboratory experimental field of Biotehnical Faculty in Ljubljana, where we tested the efficiency of shallots planting in autumn from October 2018 to July 2019. It turned out that the method of planting shallots in spring is not the most effective method for achieving quality yields due to the recurring heavy rainfall during this period. Previous experiments have shown that shallots can be planted in autumn, but as we did not know which is the most optimal planting window at that time of year, we decided to carry out further research. We included the use of two different types of shallots (\u27Red Sun\u27 and \u27Golden Gourmet\u27) planted outdoors in three different autumn dates (on 22 October, 5 November and 19 November). Plant survival was quite different between variets, while differences between planting dates were smaller. The number of flower stalks varied depending on the variety and planting dates. The number of developed bulbs per nest varied between varieties and terms and was higher in the \u27Golden Gourmet\u27 variety. A much higher yiled was obtained with the \u27Red Sun\u27 cultivar (32.1 t/ha). The highest yield of the \u27Golden Gourmet\u27 shallot reached only 19.3 t/ha. In addition, it was shown that the \u27Red Sun\u27 shallot type had a higher proportion of surviving plants at all planting dates than the \u27Golden Gourmet\u27 variety, with the highest (83 %) at the 3rd planting date and also the average total number of bulbs/plot was highest in the \u27Red Sun\u27 variety in the 2nd planting term. The share of bulbs by size classes was the highest (53 %) in the 3rd planting term and third size class, in case of the \u27Golden Gourmet\u27 variety, there was (69 %) in the 3rd planting terms and in size class 2, which means that the bulbs have a minimum diameter of 3 cm and a maximum diameter of 5 cm
Effect of biositmulants on the basis of silicon and titanium on quantity and quality of pears (Pyrus communis L.) cultivar ´Williams´
No full textNamen diplomskega dela je bil ugotoviti, ali biostimulanti na osnovi silicija in titana vplivajo na pridelek navadne hruške (Pyrus communis L.) sorte ´Viljamovka´. Ugotoviti smo želeli, kateri biostimulanti silicijevi ali titanovi, ugodneje vplivajo na količino in kakovost plodov hrušk sorte ´Viljamovka´. Poskus je potekal v nasadu hrušk v Hortikulturnem centru Biotehniške fakultete (HC BF) in Zagaju (Bistrica ob Sotli) leta 2019. Drevesom smo izmerili parametre vegetativne rasti in generativnega razvoja. Pripravek Tytanit je ugodno vplival na število plodov in količino pridelka. Optysil je pozitivno vplival na širino plodov na obeh lokacijah, saj so bili plodovi pri tem obravnavanju najširši. V Zagaju sta biostimulanta Tytanit in Optysil vplivala na večje število plodov/drevo, večji pridelek/drevo, večjo trdoto ter na manjšo višino ploda, povprečno maso ploda in vsebnost titracijskih kislin. Prav tako sta Tytanit in Optysil vplivala na večje število plodov/drevo in pridelek/drevo, višino ploda, vsebnost topne suhe snovi in titracijskih kislin na lokaciji HC BF.The purpose of this graduation thesis was to determine whether silicon- and titanium- based biostimulants affect the yield of pear (Pyrus communis L.) cultivar \u27Williams\u27. We wanted to find out which biostimulants, silicon or titanium, have a more favourable effect on the quantity and quality of pear cultivar \u27Williams\u27. The experiment took place in a pear orchard in the Horticultural Center of the Biotechnical Faculty (HC BF) and Zagaj (Bistrica ob Sotli) in 2019. We measured the parameters of vegetative growth and generative development of trees. Tytanit had a beneficial effect on the number of fruits and yield. Optysil had a positive effect on fruit width at both locations, as the fruits were the widest in this treatment. In Zagaj, the biostimulants Tytanit and Optysil affected higher number of fruits/tree, higher yield/tree, higher firmness and lower fruit height, fruit weight and titratable acid content. Tytanit and Optysil also affected higher number of fruits/tree and yield/tree, fruit height, soluble solids content and titratable acid content at the HC BF location
The effect of biostimulant on the number and size of olive (Olea europaea L.)
No full textZa oljko (Olea europaea L.) je značilno obilno cvetenje, vendar se skupno oplodi le 1 do 2 % cvetov. V letu 2019 smo na Šaredu pri sorti \u27Istrska belica\u27 analizirali vpliv ekstrakta iz morskih alg (Ascophyllum nodosum) pripravka Phylgreen, ki je bil tri krat nanešen med cvetenjem, na povečanje števila in velikost plodov. V poskus je bilo vključenih šest dreves, tri za vsako obravnavanje. Na vsakem drevesu smo pred cvetenjem označili 30 vejic s primerljivim številom socvetij. Po naravnem redčenju plodov smo plodiče prvič prešteli. To smo storili še 5. in 14. oktobra. V tehnološki zrelosti smo plodove obrali in jih odnesli v laboratorij, kjer smo jih stehtali. Določenim plodovom smo ločili meso od koščice in material posebej stehtali. Rezultati statistične analize so pokazale, da se povprečno število socvetij in cvetov na vejico po obravnavanjih ni razlikovalo. Število in masa plodov sta bila v vseh vzorčenjih večja pri drevesih tretiranih s sredstvom Phylgreen. Prav tako je bila povprečna masa mesa in koščice večja pri tretiranih drevesih. Razmerje med maso mesa in maso celotnega plodu je bilo večje pri drevesih tretiranih z biostimulantom Phylgreen.The olive tree (Olea europaea L.) is famous for its rich bloom, although only between one and two percent of the flowers are fertilized. In the year 2019 in the village of Šared we analised the effect of the Phylgreen, which is an extract made from Ascophyllum nodosum (a species of sea algae) on the quantity and size of the fruit of the cultivar ‘Istrska belica’. The Phylgreen was applied three times on the trees during the flowering period. Six trees were involved in the experiment, three for each treatment. Before the flowering, we marked thirty branch with a comparable number of inflorescences. After the natural thinning of the fruit, we counted the number of fruit for the first time. The second and the third counting took place on the 5th and 14th of October. During the fruits’ technological maturity, we harvested them and weighed them in a laboratory. The flesh of a fruits had been separated from the olive stones and both were weighed on their own. From the results of the statistical analysis it follows that there was no differences on the average number of inflorescences and flowers per branch. The fruit number and fruit weight of the trees treated with Phylgreen were larger. Furthermore, the average weight of the fruit flesh and the fruit stone of the treated trees was larger as well. The ratio between fruit flesh weight and whole fruit weight was larger in the treated trees ith the biostimulant Phylgreen
Yield and fruit quality of eggplant (Solanum melongena L.) in relation to direct cover
No full textPoskus smo izvedli z namenom, da ugotovimo učinek neposrednega prekrivanja po presajanju sadik jajčevca (Solanum melongena L.) na prosto na količino in kakovost plodov. Poskus je bil izveden na Laboratorijskem polju Biotehniške fakultete v Ljubljani in je potekal od aprila do oktobra 2018. V poskus smo vključili pet različnih sort. Od tega so bile tri hibridne sorte (\u27Galline F1\u27, \u27Black beauty F1\u27 in \u27Black bell F1\u27) in dve nehibridni sorti (\u27Violetta di Rimmini\u27 in \u27Domači srednje dolgi\u27). Za vsako sorto smo posadili 40 rastlin. Od tega smo 20 sadik prekrili za 21 dni s polipropilensko prekrivko, ostale rastline pa so bile neprekrite. Poskus je bil sestavljen iz petih ponovitev, vsako ponovitev so predstavljale 4 rastline. V rastni dobi smo imeli 6 obiranj. Pobirati smo začeli 27. junija in končali 11. oktobra. Pobrane plodove smo prešteli, stehtali in izmerili višino, širino ter maso. Prekrivanje je povečalo pridelek le pri dveh sortah, pri \u27Domači srednje dolgi\u27 za 9 % ter pri sorti \u27Black beauty F1\u27 za 12 %. Pridelek ostalih treh sort je bil pri neprekritih rastlinah večji glede na prekrite rastline. Največji pridelek so dale neprekrite rastline sorte \u27Galline F1\u27 (49 t/ha), najmanjši pa neprekrite rastline sorte \u27Domači srednje dolgi\u27 (7 t/ha). Prekrivanje rastlin je imelo pozitiven učinek na kakovost plodov le pri sorti \u27Galline F1\u27, kjer so bili plodovi prekritih rastlin 25 % težji od plodov neprekritih rastlin. Tudi pri sorti \u27Black beauty F1\u27 so bili plodovi prekritih rastlin 6 % težji glede na neprekrite rastline.The experiment was conducted to determine the effect of direct cover after transplanting eggplant (Solanum melongena L.) seedlings in the field on fruit quantity and quality. The trial was conducted on the Laboratory Field of Biotechnical Faculty in Ljubljana and lasted from April to October 2018. Five different cultivars were included in the trial. Three of them were hybrids (\u27Galline F1\u27, \u27Black beauty F1\u27 and \u27Black bell F1\u27) and two non-hybrids (\u27Violetta di Rimmini\u27 and \u27Domači srednje dolgi\u27). Forty plants were planted for each cultivar. Of these, 20 seedlings were covered with polypropylene cover for 21 days and the remaining plants were not covered. The experiment consisted of five replicates, each replicate consisting of 4 plants. We had 6 harvests during the growing period. We started harvesting on 27 June and finished on 11 October. Harvested fruits were counted, weighed, and height, width, and weight were measured. Covering increased yield only for two cultivars, for \u27Domači srednje dolgi\u27 9%, for \u27Black beauty F1\u27 12%. The yield of the other three cultivars was higher in uncovered plants than in covered plants. The highest yield was produced by uncovered plants of \u27Galline F1\u27 (49 t/ha), the lowest by uncovered plants of \u27Domači srednje dolgi\u27 (7 t/ha). Covering the plants had a positive effect on fruit quality only for the variety \u27Galline F1\u27. The fruits of the covered plants were 25% heavier than the fruits of the uncovered plants. Also for the variety \u27Black beauty F1\u27 the fruits of the covered plants were 6 % heavier than those of the uncovered plants
Succession of root colonisation of species Lolium perenne L. with arbuscular mycorrhizal fungi after soil remediation process
No full textTla so omejen vir, pogosto onesnažen s težkimi kovinami. V nalogi smo preučili vpliv remediacije tal na parametre kolonizacije rastlinskih korenin z arbuskularnimi mikoriznimi (AM) glivami in septiranimi endofiti (SE), v povezavi z različnimi tipi tal. Zasnovali smo lončni poskus v katerem smo uporabili kisla tla iz Arnoldsteina (Avstrija) in karbonatna tla iz Mežiške doline (Slovenija). Polovico originalnih (s težkimi kovinami onesnaženih) tal \u27orig\u27 obeh lokacij smo remediirali \u27rem\u27 s kelatnim ligandom etilendiamin tetraocetna kislina (EDTA), ki učinkovito odstrani težke kovine iz tal. Z namenov revitalizacije tal smo v lonce posejali rastline trpežne ljuljke (Lolium perenne L.) in \u27orig\u27 ter \u27rem\u27 tlom dodali tudi inokulum (rizosferna tla), ki izvira iz biodiverzitetno bogatega, neonesnaženega območja (Savlje). V nalogi predstavljamo podatke o mikoriznem potencialu v \u27orig\u27 in \u27rem\u27 tleh in o mikoriznem potencialu v \u27orig\u27 in \u27rem\u27 tleh z dodanim inokulumom. Primerjali smo podatke o kolonizaciji z AM in SE glivami v dveh časovnih obdobjih (2016 in 2017). Opazili smo, da se je mikoriza pri nekaterih rastlinah vzpostavila po cca. 4 mesecih od setve rastlin Lolium perenne L. (setev, 11. 7. 2016). V letu 2017 (četrto vzorčenje, 17. 11. 2017) je bila kolonizacija zaznana pri vseh obravnavanjih. Ugotovili smo, da so imela remediirana avstrijska tla značilno večjo kolonizacijo korenin Lolium perenne L. z AM glivami kot neremediirana tla, medtem ko smo pri slovenskih tleh opazili ravno obratno. Dodatek inokuluma (rizosferna tla) ni imel vpliva na večjo kolonizacijo AM gliv v koreninah rastlin.Soil is a limited resource often polluted by heavy metals. The study examined the effect of remediation on fungal parameters in arbuscular mycorrhizal (AM) fungi and septate endophytes (SE), in association with different soil types. We designed a pot experiment in which we used acidic soil from Arnoldstein (Austria) and carbonate soil from the Mežica valley (Slovenia). Half of the original (heavy metal polluted) soils of both sites were remediated with EDTA (ethylenediaminetetraacetic acid), which effectively removes heavy metals from the polluted soil. With the purpose of revitalizing the soil, we planted the plants of a perennial ryegrass (Lolium perenne L.), and we also added an inoculum (rhizosphere from a nearby grassland). The paper presents data on the mycorrhizal potential of AM fungi and SE in original and remediated soil and the mycorrhic potential of AM fungi and SE in original and remediated soil with added inoculum. We compared the data of the presence of AM fungi parameters in two time periods (2016 and 2017). We observed that mycorrhiza in some plants was established after about 4 months after sowing the plants of Lolium perenne L. (sowing, July 11, 2016). In 2017 (fourth sampling, 17 November 2017), colonization was detected in all treatments. We found that the remediated Austrian soil had significantly higher colonization of the roots of Lolium perenne L. with AM fungi as non remediated soil, while in the Slovene soil was observed exactly the opposite. The use of inoculum (rhizosphere soil) did not lead to a higher presence of AM fungi in the roots of plants
Investigation on compatibility of four bistimulants with synthetic fungicides on onion (Allium cepa L.) under field conditions
No full textV letu 2020 smo izvedli poskus s čebulo (Allium cepa L.) sorte \u27Stanfield\u27, na kateri smo preučevali vpliv štirih biostimulantov (Vitanica Si, Vitanica MC, Plantonic in Basfoliar Force) na kakovost in količino pridelka, ki je odvisen tudi od okužb z glivami in poškodb, ki jih naredijo škodljivci. Poskus smo zasnovali na Laboratorijskem polju Biotehniške fakultete v Ljubljani. Pridelovalno zemljišče smo razdelili v tri bloke, znotraj katerih smo naključno razporedili 15 obravnavanj. Biostimulante smo na čebulo nanašali v 10-dnevnih intervalih. Z njimi smo rastline škropili štirikrat v času intenzivne rasti čebule. Pri uporabi Vitanica Si se je pridelek najbolj povečal, v primerjavi z obravnavanji pozitivne in negativne kontrole, in sicer za 2 t/ha. Poskus je pokazal, da škropljenje čebule z biostimulanti povečuje občutljivost čebule na čebulno plesen. Plantonic je zmanjšal povprečni indeks okužbe listov čebule s črno listno pegavostjo. Vitanica MC, Vitanica Si in Basfoliar Force so povečali dovzetnost čebule na poškodbe žerk čebulne muhe oziroma porove zavrtalke. Plantonic in Vitanica MC sta se pokazala kot ustrezna za zmanjševanje poškodb, ki jih povzročajo strune. Pri poškodbah, ki jih na listih povzroča tobakov resar, nismo zaznali razlik med obravnavanji. Pri obravnavanjih Vitanica MC in Vitanica Si v kombinaciji s sistemičnimi fungicidi smo, v primerjavi z ostalimi obravnavanji, izmerili za 22,1 % večjo maso čebule.In 2020, an experiment with onions (Allium cepa L.) on the ‘Stanfield’ variety was conducted, in which the impact of four biostimulants (Vitanica Si, Vitanica MC, Plantonic and Basfoliar Force) in terms of yield quality and quantity, which depends on fungal infections and pest damage, was studied. The experiment was designed at the Laboratory Field of the Biotechnical Faculty in Ljubljana. The experimental field was divided into three blocks, within which 15 treatments were randomly distributed. Biostimulants were applied in intervals of 10 days. They were sprayed four times during the intensive growth of the aboveground part of the onion. When using the Vitanica Si, the yield was the greatest in comparison to the positive and negative control, reached 2 t/hectare. The experiment showed that spraying onions with biostimulants increases the susceptibility of onionto the downy mildew. Plantonic showed the lowest average index of onion leaf infestation with onion purple blotch. Vitanica MC, Vitanica Si and Basfoliar Force showed an increased susceptibility of onions to damage caused by the onion fly i.e. onion leaf miner. Plantonic and Vitanica MC have been shown to be suitable for reducing the click beetle damage. In the case of leaf damage caused by onion thrips, we did not determine significantly damages among treatments. When Vitanica MC and Vitanica Si were used with a systemic fungicide, we found 22.1% greater mass of onion in comparison to the other treatments
Synthesis of derivatives of L-arginine from N-benzyloxycarbonyl-L-ornithine
No full textV sklopu diplomskega dela smo želeli pripraviti del tetrapeptidne elektrofilne
sonde, in sicer Arg(Boc)2-SerOMe (4). Uspešno smo sintetizirali N-Cbz-Arg(Boc)2-OH
(1) iz N-Cbz-Orn(Boc)-OH in N,N\u27-Boc2-S-metilizotiosečnine. Spojino 1 smo nato
spojili s serin metil estrom hidrokloridom v dipeptid N-Cbz-Arg(Boc)2-SerOMe (2) v
prisotnosti treh različnih aktivacijskih reagentov: CDI, EEDQ in EDC. Pri tem se je kot
stranski produkt tvoril α-N-benziloksikarbonil-ω,ω\u27-di-N-t-butoksikarbonil-L-arginin
laktam (3). Poskus zmanjšanja deleža spojine 3 je bil neuspešen. V zadnjem koraku
sinteze spojine 4 smo spojini 2 selektivno odstranili Cbz zaščitno skupino s katalitskim
hidrogeniranjem.As a part of my Bachelor\u27s thesis we aimed to prepare a part of a tetrapeptide
electrophilic probe, namely Arg(Boc)2-SerOMe (4). N-Cbz-Arg(Boc)2-OH (1) was
successfully synthesized from N-Cbz-Orn(Boc)-OH and N,N\u27-Boc2-Smethylisothiourea. Compound 1 was then coupled with serine methyl ester
hydrochloride to the dipeptide N-Cbz-Arg(Boc)2-SerOMe (2) in the presence of three
different coupling reagents: CDI, EEDQ and EDC. α-N-benzyloxycarbonyl-ω,ω\u27-di-N-tbutoxycarbonyl-L-arginine lactam (3) was formed as a by-product. An attempt to reduce
the proportion of compoud 3 was unsuccessful. As a last step in the synthesis of
compound 4, Cbz protecting group was selectively removed from compound 2 by
catalytic hydrogenation
Učinek gnojil na pridelek, porabo vode in vsebnost energije pri navadnem sirku za zrnje (Sorghum bicolor L.)
No full textThis study aimed to determine how fertiliser rates affect biological yield, water use, and energy capacity of grain sorghum. Field experiment was conducted at the Uladovo-Lyulynetsk Research and Selection Station (49° 35ˈ N, 28° 24ˈ E) in 2017–2021. Trial was arranged using a randomized experimental design in four replications with a seeding plot area of 62 m2, a harvesting area of 50 m2. The investigated factors were: control, without fertiliser, winter wheat straw at the rate of 4 t ha-1 as a background, mineral fertilisers at rates of N60Р60К60, N90Р90К90, N120Р120К120 and the estimated rate of N105Р35К60. Grain sorghum produced high yields of biomass on black soils against the background of natural fertility with a yield of grain – 5.96 t ha-1, stems – 30.3 t ha-1. Application straw and mineral fertilisers ensured efficient moisture consumptions by plants. Estimated fertilisers rate N105P35K60 against the background of 4 t ha-1 of straw provided similar productivity of sorghum with the maximal rate of N120P120K120 and can be recommended for fertilising as more cost-effective. This fertilisation increased grain yield - by 35 %, bio-ethanol output - by 41 %, solid biofuel - by 17 %, total energy output - by 23 %.Namen raziskave je bil določiti učinek odmerkov gnojil na biološki pridelek, porabo vode in energetsko vsebnost navadnega sirka za zrnje. Poljski poskus je potekal na Uladovo-Lyulynetsk Research and Selection Station (49° 35\u27 N, 28° 24\u27 E) v rastnih sezonah 2017–2021. Poskus je potekal kot naključni poskus s štirimi ponovitvami s površino setve 62 m2 in površino žetve 50 m2. Obravnavanja so obsegala: kontrola brez gnojil, slama ozimne pšenice v odmerku 4 t ha-1 kot ozadje, mineralna gnojila v odmerkih N60Р60К60, N90Р90К90, N120Р120К120 in ocenjen odmerek N105Р35К60. Sirek za zrnje je imel velik pridelek biomase na črnih tleh kot ozadju naravne rodovitnosti s pridelkom zrnja 5.96 t ha-1 in stebel 30.3 t ha-1. Uporaba slame in mineralnih gnojil je zagotovila zadostno vlago za potrebe rastlin. Ocenjen odmerek gnojila N105Р35К60 in uporaba slame v odmerku 4 t ha-1 sta dala podobno produktivnost sirka z največjo vrednostjo z odmerkom mineralnih gnojil N120Р120К120, kar bi lahko priporočili za cenovno učinkovito gnojenje. Takšno gnojenje je povečalo pridelek zrnja za 35 %, bioetanola za 41 %, goriva iz slame za 17 % in celokupni energetki izkopiček za 23 %
- …
