diplomsko delo
Barbara Matko (Author), Ludvik Rozman (Mentor)

Abstract

Namen naloge je bil preučiti vpliv različnih rokov setve sladke koruze na čas spravila, pridelek in poškodbe s koruzno veščo (Ostrinia nubilalis) mlečno zrelih storžev sladke koruze. V preučevanje sta bili vključeni dve sorti sladke koruze, in sicer Zarja, slovenski križanec, in Gold Cup, križanec iz ZDA, ki je že dlje v prodaji v Sloveniji. Poljski poskus je bil izveden na poskusnem polju Biotehniške fakultete v Ljubljani na Centru za razvoj kmetijstva in podeželja v Jabljah pri Trzinu. Vsaka sorta je bila posejana na parceli velikosti 2 vrsti po 10 rastlin, razdalja setve je bila 70×25 cm, in sicer v 6-ih rokih setve od 8. maja do 24. junija. Poskus je bil optimalno oskrbovan s potrebnimi agrotehničnimi ukrepi. Setev in spravilo smo izvedli ročno. Med rastno dobo smo beležili čas cvetenja in preverjali ustrezno mlečno zrelost. Storže smo pobirali v času mlečne zrelosti, in sicer sproti, ko so dosegli primerno mlečno zrelost. V laboratoriju smo na svežih mlečno zrelih storžih izmerili dolžino in premer storžev, prešteli število vrst zrn na storžu ter vsak storž posebej stehtali. Za vse lastnosti smo izračunali povprečne vrednosti in koeficient variabilnosti. Rezultati so pokazali, da je s šestimi različnimi časovnimi roki setve od 8. maja do 24. junija, mogoče zagotoviti razpoložljivost svežih mlečno zrelih storžev sladke koruze od 13. avgusta do 1. oktobra. Sorta Zarja, ki je zgodnejša sorta, je prej cvetela in je ob prvih pobiranjih imela več primerno mlečno zrelih storžev. Sorta Gold Cup je imela nekoliko daljše, debelejše in težje storže, je bila pa v vseh lastnostih manj izenačena kot Zarja. Najvišje vrednosti za dolžino, debelino in maso storžev smo pri obeh sortah dobili pri 1. in 2. roku setve, najnižje pa v zadnjem, 6. roku setve. Odstotek poškodovanih storžev s koruzno veščo je bil pri obeh sortah podoben, občutno več poškodb je pri obeh sortah bilo v zadnjem, 6. roku setve.

Keywords

sladka koruza;sorta;žlahtnjenje;pridelek;roki setve;koruzna vešča;Ostrinia nubilalis;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [B. Matko]
UDC: 635.67:633.15:632.78:631.53.04:631.559(043.2)
COBISS: 8801657 Link will open in a new window
Views: 1591
Downloads: 445
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Other data

Secondary language: English
Secondary title: ǂThe ǂimpact of different sweet maize (Zea mays L. saccharata Koern.) sowing dates on the harvest time, yield and injuries caused by European corn borer (Ostrinia nubilalis Hbn.)
Secondary abstract: The main aim of our work was to study the impact of different sowing dates of sweet maize on harvest time, yield and damage of sweet maize ears caused by the European corn borer. In this study, two hybrids of sweet maize were included, namely the Slovenian hybrid Zarja and the USA hybrid Gold Cup. The field experiment was conducted at the Experimental field of the Biotechnical Faculty at Jable near Ljubljana. Each hybrid was planted on 6 different dates from 8th of May till 24th of June, at 8-10 days intervals. Sowing and harvesting were carried out manually. During the growth period, we recorded the dates of tasseling and silking, and the time of 'milk' maturity. The ears were harvested when they reached the appropriate stage of 'milk' maturity. We determined the length and weight of ears, and the grain rows number. Results showed that with 6 different sowing dates, from 8th May to 24th June, it was possible to provide fresh mature sweet maize ears from 13th August till 1st October. The Slovenian variety Zarja was earlier than Gold Cup. Zarja was characterised by more mature maize ears at earlier harvesting. The Gold Cup had longer, thicker and heavier ears although all recorded properties exhibited higher variability when compared to Zarja. Longest, thickest and heaviest maize ears were harvested during 1st and 2nd terms of harvest, whereas the shortest, thinnest and lightest ears were recorded during last 6th terms. The percentage of damaged ears by the European corn borer was the same in both hybrids. The highest percentage of damaged ears, in both hybrids, were recorded during the 6th term of harvest.
Secondary keywords: sweet maize;variety;breeding;yield;sowing time;European corn borer;
Type (COBISS): Bachelor thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za agronomijo
Pages: IX, 32 f.
ID: 10910902