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1.
Comparability of the biodynamic production system regarding agronomic, environmental and quality parameters
Matjaž Turinek, 2011, doktorska disertacija

Opis: Biodynamic (BD) agriculture became the subject of research efforts during the last decades, whereas a part of the scientific community looks at the BD method with skepticism and marks it as dogmatic. Summarized data of published research studies showed that further research is needed in the field of food quality comparison/determination, food safety and the environmental performance (e.g. foot prints). In this sense, yields, agronomic efficiency (AE) in relation to yields in some crops and the earthworm populations depending on those crops remain to be explored under the BD production system (PS). Therefore wheat, cabbage and oil pumpkins (rotation 1) and spelt, red beet and false flax (rotation 2) were produced in three successive years (2008-2010) under 4 PS (conventional (CON), integrated (INT), organic (ORG) and BD) + control plots in a field trial near Maribor, Slovenia. Earthworms were determined in rotation 1 in October 2009 and 2010 using the „hot“mustard-extraction method. Yields in the BD PS amounted to 99, 113 and 124 percent of the average yields of all PS for wheat, cabbage and oil pumpkin seeds, respectively. Also AE of N, Nmin, P and K of the BD system for the production of all crops studied in rotation 1 was in the upper half of all PS under investigation. Moreover, earthworm populations and biomass were highest and on a similar level in the BD and ORG systems in all three crops investigated, where most were found in oil pumpkins. In the second step the ecological footprint of PS under study was calculated for wheat and spelt production and interpreted using the SPIonExcel tool. Three-year results show a markedly lower ecological footprint of the ORG and BD systems in production of both crops, mainly due to non-use of external production factors. When yields are added to the equation, the ORG and BD systems also have a lower overall footprint per product unit and ecological efficiency of production. Thus, ORG and BD systems present viable alternatives in facing environmental degradation and climate change in cereal production. However, room for improvement exists in the area of machinery use in all systems studied and yield improvement in the ORG farming system. Moreover, the importance of food quality has increased, but there remains a lack of research in this field, including sensory quality. Thus, in the third step, yields and sensory properties of white cabbage and red beet were examined in 2008 and 2009. Yields did not differ significantly among PS. A total of 167 consumers scored four attributes (color, odor, taste, and willingness to buy) using a nine-point hedonic scale. Results show significant differences between PS for both crops, where INT and control cabbage was preferred over CON cabbage samples (BD and ORG in-between), whereas BD and control red beet was preferred over CON and INT samples (ORG in-between). Lastly, the contents of sugars, organic acids, total phenolic content and the antioxidant activity were quantified in the flesh of red beet samples from 2009 using established methods. Significant differences were measured for malic acid, total phenolic content (TPC) and total antioxidant activity, where malic acid content ranged from 2.39 g kg-1 FW (control) to 1.63 g kg-1 FW (CON, ORG and INT). Highest TPC was measured in BD and control samples (0.677 and 0.672 mg GAE g-1, respectively), lowest in CON samples (0.511 mg GAE g-1). Antioxidant activity was positively correlated with TPC (r2=0.6187) and ranged from 0.823 µM TE g-1 FW to 1.270 µM TE g-1 FW in CON and BD samples, respectively, whereas total sugar content ranged from 21.03 g kg-1 FW (CON) to 31.58 g kg-1 FW (BD). The importance of the measured constituents for human health, as well as for plant resilience and health is discussed and put into perspective. Thus, the BD PS presents a viable alternative to the nowadays predominant CON and INT PS for the production of the studied crops under the Slovene subcontinental temperate climate.
Ključne besede: biodynamic farming, agronomic efficiency, earthworms, ecological footprint, sensory quality, chemical composition
Objavljeno: 31.03.2011; Ogledov: 4242; Prenosov: 531
.pdf Celotno besedilo (1,03 MB)

2.
Vpliv setvenih rokov na morfološke in biokemijske značilnosti redkvice
Sara Fakin, 2012, diplomsko delo

Opis: Biološko-dinamična pridelava temelji tudi na delu s silami kozmosa, ki vplivajo na rast in razvoj rastlin. S setvijo, sajenjem, presajanjem, okopavanjem, oskrbo in spravilom na določen dan oziroma glede na posredovan kozmični vpliv spodbudimo rastlino, da ta vpliv sprejme ter ga izrazi z značilno rastjo in razvojem določenih morfoloških značilnosti rastline. V diplomski nalogi smo spremljali vpliv kozmičnih sil na rast in razvoj redkvice (Raphanus sativus var. radicula L.), ki smo jo sejali ob treh različnih terminih, na dan za korenino, dan za list in neugoden dan. V prvem sklopu so nas zanimale morfološke razlike med posameznimi setvenimi skupinami od vznika do faze zrelosti. Največ vzniklih rastlin in največje število listov smo našteli pri skupinah list in korenina. Meritve mase, širine in dolžine hipokotilov so pokazale najvišje vrednosti pri skupini korenina, sledila sta termina neugodno in list. Redkvice so imele tendenco k večjim in lepše oblikovanim hipokotilom pri skupinah korenina in list. Pri merjenju barve povrhnjice hipokotilov je bila najtemnejša vrednost parametra svetlosti (L*) izmerjena pri skupini korenina. Pri biokemijski določitvi skupnih fenolov v povrhnjici, sredici in celotnem hipokotilu smo izmerili signifikantne razlike v povrhnjici hipokotilov. Največ skupnih fenolov smo izmerili pri skupini korenina, sledili sta skupini neugodno in list.
Ključne besede: redkvica, Raphanus sativus var. radicula L., biološko-dinamična pridelava, setveni termini, morfološke značilnosti, vsebnost skupnih fenolov
Objavljeno: 08.10.2012; Ogledov: 1327; Prenosov: 62
.pdf Celotno besedilo (4,56 MB)

3.
Možnost pridelave travniške arnike (Arnica chamissonis Less. ssp. foliosa (Nutt.) Maguire) v Spodnji Savinjski dolini glede na različno gostoto nasada
Polonca Kumer, 2012, diplomsko delo

Opis: Potreba naše družbe po zdravilih in alternativnih pripravkih se veča in z njo pridobivanje ter izkoriščanje zdravilnih rastlin, rastočih v naravi. Prepričanje, da so samo te najboljše za uporabo in jih ni mogoče gojiti na poljih, je dokazano zmotno. V poljskem poskusu leta 2011 se je to pokazalo pri zelo vsestransko uporabni trajnici travniški arniki (Arnica chamissonis Less. ssp. foliosa (Nutt.) Maguire), ki je po učinkovinah povsem enaka ali celo boljša od avtohtone gorske arnike (Arnica montana L.). Namen poskusa je približati pridelavo arnike ekološkim pridelovalcem, zeliščarjem in posameznikom ter s tem ohraniti naravna rastišča gorske arnike. Na domačem polju v Savinjski dolini je bilo preverjeno, če ta rastlina sploh uspeva v našem podnebju in kakšna gostota ji najbolje ustreza za dober razvoj in pridelek. V poskusu so bile leta 2010 vzgojene in nasajene sadike, leta 2011 pa analizirana obnova in višina rastlin, pridelek, zapleveljenost, čas ročne odbire in učinkovitost pobiranja glede na različne gostote rastlin v nasadu. Ker se travniška arnika razraste z rizomi, se čez zimo zelo dobro okorenini, kar je pokazalo štetje mladih rastlin spomladi 2011. Ponekod se je gostota povečala za kar do 31-krat. Izkazalo se je, da ima termin odbire cvetov statistično značilen vpliv na pridelek in višino rastlin. Gostota zasaditve ni pokazala pomembnih razlik v pridelku, kljub temu je bil ta največji pri 7,7 rastline/m2 oziroma medvrstni razdalji 30 cm in vrstni razdalji 40 cm.
Ključne besede: arnika, Arnica chamissonis Less., gostota, pridelek, A. montana L., pridelava zelišč
Objavljeno: 22.10.2012; Ogledov: 3184; Prenosov: 241
.pdf Celotno besedilo (1,24 MB)

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Grain amaranth as an alternative and perspective crop in temperate climate
Silva Grobelnik Mlakar, Matjaž Turinek, Manfred Jakop, Martina Bavec, Franc Bavec, 2010, pregledni znanstveni članek

Opis: As a consequence of globalisation and industrialisation of agriculture, global food security has become increasingly dependent on only a handful of fertilisation and energy high demanding plant species. This involution has increased the vulnerability of agriculture, reduced genetic diversity, provoked some environmental problems and impoverished the human diet. The mentioned facts stimulate the retrieving of alternative crops into the production. The present paper briefly describes crop importance, botany, nutritional value and utilisation of grain amaranth (Amaranthus spp.), one of the alternative crops discussed in the book Organic Production and Use of Alternative Crops. The immediate objective of this paper is to present information gained as a result of a national project on grain amaranth.
Ključne besede: grain amaranth, nutrition value, utilisation
Objavljeno: 29.03.2018; Ogledov: 287; Prenosov: 71
.pdf Celotno besedilo (172,19 KB)
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