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Featured researches published by Danijela Poljuha.


Environmental Management | 2012

Introduction of Participatory Conservation in Croatia, Residents’ Perceptions: A Case Study from the Istrian Peninsula

Barbara Sladonja; Kristina Brščić; Danijela Poljuha; Neda Fanuko; Marin Grgurev

Croatia, like many other transition countries has undergone radical changes in its nature protection models. This paper discusses a historical overview, present situation and future possibilities for nature conservation in Croatia. A conservative top-down approach to nature protection was applied in the past in Croatia and is now being replaced by a prevalent bottom-up approach. Social context is crucial to introducing participatory conservation, therefore special concern is given to the perception of the local population towards protected area management in Istria as a case study in Croatia. Survey data were used to assess the conservation knowledge of local populations and their perception towards Protected Areas (PAs), leadership activities and management authorities in Istria County. This paper examines the perceptions of 313 residents living in and around six natural PAs located in Istria. The results revealed a moderate general knowledge about PAs in Istria and environmental issues, and a low awareness of institutions managing PAs, eagerness to participate in the activities of PAs and general support for the conservation cause. Understanding the perception of local residents enables the creation of feasible, long-term strategies for the implementation of participatory conservation. The research identifies the need for greater human, technical and financial efforts to strengthen the management capabilities of local agencies responsible for PAs. The process of participatory conservation optimization in Croatia is underway and world experiences must be observed in order to create a congruent, site-specific model with the best possible results.


Acta Botanica Croatica | 2016

The effect of biostimulant and fertilizer on “low input” lettuce production

Slavica Dudaš; Ivana Šola; Barbara Sladonja; Renata Erhatić; Dean Ban; Danijela Poljuha

Abstract Lettuce production in the winter on the Adriatic coast, especially in a non-heated plastic tunnel, requires longer cultivation and is characterised by lower head mass and yield. In these conditions, the effect of biostimulant Bio-algeen S-90 and fertilizer Megagreen on the production of the traditional winter lettuce cultivar ‘Four Seasons’ was tested. Both treatments showed a positive effect on the growth and total yield of winter lettuce, and decreased the share of non-marketable yield. Bio-algeen S-90 treatment increased the plant height by 61.5%, and foliar treatment with Megagreen by 60.9%, as compared to the control treatment. Equally, both treatments resulted in higher leaf numbers (47.7% for Bio-algeen S-90 and 37.2% for Megagreen). The head mass of lettuce treated with Bio-algeen S-90 and Megagreen was 30.3% and 25.0% higher than in the control treatment, respectively. Megagreen contributed more to chlorophyll and carotenoid content, while Bio-algeen S-90 elevated the amount of vitamin C and dry matter. The pH value of lettuce juice decreased after Bio-algeen S-90, while the mineral content (N, P and K) did not differ between the tested treatments. Lower nitrate content was detected after both treatments. The obtained results elucidate the effect of Bio-algeen S-90 and Megagreen on “low input” lettuce production.


Applied Economics | 2017

An empirical examination of consumer preferences for honey in Croatia

Kristina Brščić; Tina Šugar; Danijela Poljuha

ABSTRACT In past years, beekeeping as an agricultural sector has become more organized, but there is still a gap in knowledge in considering consumer preferences for honey. The aim of the research was to determine consumer preferences for honey and their attitudes towards the Protected Designation of Origin (PDO) label. Also, in the article is presented the current situation regarding the honey market and legislation of the PDO label at the EU and national levels. The result of the empirical research carried out on a sample of 1008 respondents showed that they mostly prefer a mild flavour and brighter colour of honey. According to the type, most of the respondents prefer acacia rather than floral and meadow honeys or other types of honey. The most common method of honey purchase is directly from the producers (75%). The results of the Principle Component Analysis (PCA) showed that the most important attributes are the intrinsic attributes of the honey and that the most common reasons for purchasing and consuming honey are for its health and medical benefits. The obtained results fill the gap in knowledge regarding consumer preferences for honey in the Croatian market and can be useful for the creation of new honey-marketing strategies for local beekeepers.


Acta Botanica Croatica | 2016

Effects of biodynamic production on growth and essential oil content in basil

Slavica Dudaš; Danijela Poljuha; Ivana Šola; Sabina Šegula; Sanja Varga; Barbara Sladonja

Abstract The effects of a biodynamic sowing calendar on the growth (plant height, fresh herb yield, nodes number) and quality (percentage of leaf mass, essential oil content) of three basil species, Ocimum americanum L., Ocimum × hybrida and Ocimum basilicum L., represented by the cultivars ‘Rosso’ and ‘Eco Genovese’, were tested. Statistical analyses showed that the species had greater impact on the observed parameters than either the sowing date or the species and sowing date in combination. The species showed a significant influence on all five tested parameters, while sowing date and interaction of both factors significantly influenced plant height, leaf percentage and essential oil content. The best yield per plant was obtained for O. × hybrida and O. basilicum ‘Eco Genovese’. The lowest species O. × hybrida produced the highest amount of essential oil. »Nodes number« parameter most clearly separated the species, but not the cultivars. Even though O. americanum gave the tallest plants, it did not yield either the highest amount of fresh herb or essential oil. This species’ height was most consistent, considering the significant impact of biodynamic rhythm. Sowing date was not crucial for basil fresh yield; however if there is a need for taller plants with a higher percentage of leaf mass and more essential oil, sowing date needs to be controlled.


Food Technology and Biotechnology | 2008

A Multidisciplinary Approach to the Characterisation of Autochthonous Istrian Olive (Olea europaea L.) Varieties

Danijela Poljuha; Barbara Sladonja; Karolina Brkić Bubola; Marina Radulović; Kristina Brščić; Elvino Šetić; Marin Krapac; Aldo Milotić


Agriculturae Conspectus Scientificus (Poljoprivredna Znanstvena Smotra) | 2009

Sanitary Status of Croatian Native Grapevine Varieties

Jasminka Karoglan Kontić; Darko Preiner; Silvio Šimon; Goran Zdunić; Danijela Poljuha; Edi Maletić


Journal of Food Agriculture & Environment | 2010

Incidence of viruses infecting grapevine varieties in Istria (Croatia)

Danijela Poljuha; Barbara Sladonja; Marijan Bubola


Food Technology and Biotechnology | 2014

Morphological and Molecular Characterization of Bova Olive Cultivar and Aroma Fingerprint of Its Oil

Karolina Brkić Bubola; Marin Krapac; Igor Lukić; Barbara Sladonja; Antonella Autino; Claudio Cantini; Danijela Poljuha


Archive | 2013

The Mediterranean Genetic Code - Grapevine and Olive

Danijela Poljuha; Barbara Sladonja


Vitis: Journal of Grapevine Research | 2015

Autochthonous Croatian grapevine cultivar 'Jarbola' – molecular, morphological and oenological characterization

Barbara Sladonja; Danijela Poljuha; Tomislav Plavša; Đordano Peršurić; Manna Crespan

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