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Agronomski in okoljski vidiki prekrivnih posevkov v ekološki pridelavi zelenjadnic
Martina Robačer, 2019, doktorsko delo/naloga

Opis: Cover crops can reduce the use of external inputs such as pesticides and fertilisers and can at the same time suppress weeds as well as improve or maintain soil fertility. Cover crops can also modify the microclimate which affects pest populations and diseases. Determining cover crop species and management practices is based on the needs and goals of production. The effects of introducing living mulch (LM) and management strategies on cash crop yield, product quality and energy use were studied in certain European countries (Slovenia, Italy, Germany and Denmark) in different climatic and soil conditions. In Slovenia, in organic production of cauliflower and leek, the effects of two terms of sowing white clover with additive design were compared with a production with black foil and with the usual agricultural practice by hoeing. In the field experiments the effect of LM on arthropod dynamics and activity density was investigated. The results demonstrated that the LM systems with a substitutive design, can be effectively implemented in vegetable production if the value of the ecological services (positive externalities) delivered by LM can counterbalance the yield loss due to the cash crop density reduction. If an additive design is used, the LM should be sown several weeks after the cash crop planting. Different cash crop genotypes (i.e., open pollinated/local cultivars in comparison with the hybrids) performed similarly. Use of human labor (HL) and fossil fuel (FF) energy slightly increased in LM systems (7%). The farmers’ acceptance of the LM techniques was quite high (75% of the interviewed sample). The LM technique did not affect the infestation of cabbage caterpillar Pieris spp., showing no detrimental effect of this technique on this key pest of cabbage. In Denmark, aphid populations were higher in the sole crop system than in the LM system. In Italy, a level of larval parasitization was detected and in the first year the percentage of parasitization was higher in LM (88%) than in sole crop (63%). Overall, the LM positively affected the activity density of Carabid beetles, also increasing the diversity and evenness of species (Slovenia and Italy) or activity density of some taxa (Slovenia and Denmark). Due to numerous agroecological services of cover crops, growing simultaneously with vegetables as LM, this could be promising technique for organic and others production systems in the future.
Ključne besede: organic vegetable production, cover crops, agroecological service, living mulch, energy consumption, biodiversity, soil arthropod
Objavljeno: 01.02.2019; Ogledov: 974; Prenosov: 129
.pdf Celotno besedilo (1,43 MB)

Vegetable revolution and rural sustainable development
Nizamuddin Khan, Sadiq Salman, Anisur Rehman, 2009, izvirni znanstveni članek

Opis: Indian agriculture is now at a critical juncture. The liberalization of agricultural trade, increasing trends of urbanization and fragmentation of the land have resulted in commercialization of Indian agriculture. In the present scenario, farmers are bound to turn towards more remunerative crops, like vegetables, for their sustenance. India has a large population and diverse agro–climatic conditions that favor the growth of various vegetables in the country. Vegetable revolution, in the last decades, has been a ray of hope for the landless, small and marginal farmers. This has become a new dimension of development in favor of the poor rural masses. Our study was undertaken in the Bulandshahr district, lying in the Indogangetic plain. This area not only has fertile land, but also has an efficient infrastructure to support vegetable cultivation. The present study focuses the role of vegetable cultivation upon rural sustainable development. The study revealed that the area studied witnessed an alarming growth in expansion of vegetable cultivation during recent decades. An efficient vegetable marketing network with the integration of rural markets at a grassroots level is urgently needed for sustainable, economically viable and socially acceptable planning of diversification of agriculture with value added crops like vegetables both in the study area and in the country at a national level.
Ključne besede: vegetable revolution, marginal, small, farmers, sustainable, development
Objavljeno: 20.03.2018; Ogledov: 427; Prenosov: 62
.pdf Celotno besedilo (368,42 KB)
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Multi-criteria assessment of vegetable production business alternatives
Silvo Pozderec, Martina Bavec, Črtomir Rozman, Jožef Vinčec, Karmen Pažek, 2015, izvirni znanstveni članek

Opis: Purpose: Organic and integrated production of vegetables are the two most common production systems in Slovenia. The study analyzed two production systems with different cultures as alternatives with purpose to find the most appropriate variants. Design/Methodology/Approach: The study based on the development and integration of developed specific technological- economic simulation models for the production of vegetables (salad, growing peppers, salad cucumbers, pickling cucumbers, round and cherry tomato) in greenhouse and multi-criteria decision analysis. The methodology of the study based on the DEX methodology and the analytical hierarchy process (AHP) of organic (ECO) and integrated production (IP) in greenhouse. Results: The evaluation results show that both cultivation methods of commercially attractive vegetables in greenhouse are variable. In the case of integrated production, the assessment of multi-criteria decision analysis EC and DEXi showed that salad (Donertie F1) proved to be the best possible alternative. In the case of organic production, the multi-criteria analysis assessment of pickling cucumbers (Harmony F1) is the best possible business alternative. Conclusion: For the further production planning process by decision maker is the ranking with Expert Choice (EC) more useful and precise, while the DEX evaluations are more descriptive.
Ključne besede: simulation models, multi-criteria analysis, vegetable, greenhouses
Objavljeno: 04.04.2017; Ogledov: 829; Prenosov: 285
.pdf Celotno besedilo (709,15 KB)
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Concentration of free fatty acids in rapeseed oil
Petra Kotnik, Mojca Škerget, Željko Knez, 2012, objavljeni znanstveni prispevek na konferenci

Ključne besede: materials, methods, vegetable oils
Objavljeno: 01.06.2012; Ogledov: 1359; Prenosov: 18
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