Savica 2020 : diplomski rad

Danas u gradovima živi 50% svjetskog stanovništva, a do 2050. godine ta će brojka iznositi oko 70%. Uz kontinuiran rast gradova, i poljoprivredne zone morat će rasti kako bi prehranile oko dvije trećine populacije. Povećat će se udaljenost između mjesta proizvodnje i mjesta kupovine namirnica. Uz problem ekonomičnosti, pojavit će se i problem nedostatka površina pogodnih za uzgoj. Diplomski rad se bavi problematikom uzgoja vlastite hrane u gradovima. To rješenje bi omogućilo dostupnost svježih namirnica na mjestu uzgoja, smanjilo svakodnevne troškove stanovnika te troškove transporta te potaknulo interakcije među stanovnicima

Savica 2020 : diplomski rad

Danas u gradovima živi 50% svjetskog stanovništva, a do 2050. godine ta će brojka iznositi oko 70%. Uz kontinuiran rast gradova, i poljoprivredne zone morat će rasti kako bi prehranile oko dvije trećine populacije. Povećat će se udaljenost između mjesta proizvodnje i mjesta kupovine namirnica. Uz problem ekonomičnosti, pojavit će se i problem nedostatka površina pogodnih za uzgoj. Diplomski rad se bavi problematikom uzgoja vlastite hrane u gradovima. To rješenje bi omogućilo dostupnost svježih namirnica na mjestu uzgoja, smanjilo svakodnevne troškove stanovnika te troškove transporta te potaknulo interakcije među stanovnicima

Hydroponics plant cultivation

Hidroponija je inovativna metoda uzgoja biljaka u hranjivoj otopini (bogatoj nutrijentima odnosno anorganskim ionima neophodnim za život biljaka) sa ili bez krutih medija u zaštićenom prostoru, plasteniku ili stakleniku. Hidroponski uzgoj biljaka omogućava uzgoj biljaka cijele godine na površinama na kojima uvjeti nisu pogodni, na tlima smanjene plodnosti te u uvjetima kada je proizvodnja limitirana veličinom površine ili nepovoljnim fizikalno-kemijsko-biološkim svojstvima tla. Prednosti hidroponskog uzgoja ogledaju se i kroz visok intenzitet proizvodnje i stabilan prinos po jedinici površine, te kroz smanjenu potrošnju vode, hraniva i zaštitnih sredstava, ranije dozrijevanje plodova te smanjenu pojavu stresa kod biljaka zbog optimalnih uvjeta rasta i razvoja. Nedostaci hidroponskog uzgoja su visoka cijena početnog ulaganja, nužnost visoke razine znanja, cjelodnevni nadzor i u slučaju bolesti – brzo širenje vodom. Ključne riječi: hidroponski uzgoj, hranjiva otopina, prednosti, nedostatciHydroponics is an innovative method of growing plants in a nutrient solution (rich in inorganic ions essential for plant growth) with or without solid medium in a closed environment, like as a greenhouse. Hydroponic plant growing enables growing plants throughout the whole year in areas with unfavourable conditions, in soils with low fertility and in conditions where production is limited by the size of the agricultural land or by unfavourable physical-chemical-biological properties of the soil. Advantages of hydroponic growing are high production intensity and yield stability per unit area, reduced consumption of water, nutrients and pesticides, faster fruit ripening and plants experiencing less stress due to optimal growth conditions. Disadvantages of hydroponic growing are high initial investment costs, need to have expert knowledge, all-day-round monitoring and, in case of a plant disease, rapid spread by water

Hydroponics plant cultivation

Hidroponija je inovativna metoda uzgoja biljaka u hranjivoj otopini (bogatoj nutrijentima odnosno anorganskim ionima neophodnim za život biljaka) sa ili bez krutih medija u zaštićenom prostoru, plasteniku ili stakleniku. Hidroponski uzgoj biljaka omogućava uzgoj biljaka cijele godine na površinama na kojima uvjeti nisu pogodni, na tlima smanjene plodnosti te u uvjetima kada je proizvodnja limitirana veličinom površine ili nepovoljnim fizikalno-kemijsko-biološkim svojstvima tla. Prednosti hidroponskog uzgoja ogledaju se i kroz visok intenzitet proizvodnje i stabilan prinos po jedinici površine, te kroz smanjenu potrošnju vode, hraniva i zaštitnih sredstava, ranije dozrijevanje plodova te smanjenu pojavu stresa kod biljaka zbog optimalnih uvjeta rasta i razvoja. Nedostaci hidroponskog uzgoja su visoka cijena početnog ulaganja, nužnost visoke razine znanja, cjelodnevni nadzor i u slučaju bolesti – brzo širenje vodom. Ključne riječi: hidroponski uzgoj, hranjiva otopina, prednosti, nedostatciHydroponics is an innovative method of growing plants in a nutrient solution (rich in inorganic ions essential for plant growth) with or without solid medium in a closed environment, like as a greenhouse. Hydroponic plant growing enables growing plants throughout the whole year in areas with unfavourable conditions, in soils with low fertility and in conditions where production is limited by the size of the agricultural land or by unfavourable physical-chemical-biological properties of the soil. Advantages of hydroponic growing are high production intensity and yield stability per unit area, reduced consumption of water, nutrients and pesticides, faster fruit ripening and plants experiencing less stress due to optimal growth conditions. Disadvantages of hydroponic growing are high initial investment costs, need to have expert knowledge, all-day-round monitoring and, in case of a plant disease, rapid spread by water

The effect of abiotic factors, sowing density and multiple harvest to arugula yield in floating hydroponic

U istraživanju je vrednovan utjecaj gustoće sjetve (6 i 9 g m-2) i višekratne berbe (dva i tri navrata) na prinos rige sorta ‘Coltivata’ u plutajućem hidroponu. U cjelogodišnjem uzgoju u zaštićenom prostoru također je promatran utjecaj abiotskih čimbenika tijekom tri razdoblja uzgoja (ljeto, jesen-zima i proljeće). Tijekom 339 dana istraživanja provedena su 24 pokusa, postavljena po metodi slučajnog bloknog rasporeda u četiri ponavljanja. Promatrani abiotski čimbenici (temperatura, količina otopljenog kisika, pH- i EC-vrijednost) hranjive otopine bili su u rasponu: 12,4 do 26,1°C, 3,6 do 8,1 mg L-1, 5,4 do 6,6 i 2,7 do 3,3 dS m-1. Najmanja i najveća temperatura zraka bile su u rasponu 5,3 do 18,0°C i 16,4 do 45,1°C, a relativna vlaga zraka 48,1 do 78,9%. Najkraći proizvodni ciklus (36 dana od sjetve do druge berbe) bio je u ljetnom roku uzgoja s prosječnim vrijednostima abiotskih čimbenika: temperatura zraka i hranjive otopine 28,1 i 25,3°C, relativna vlaga zraka 53,6% i količina otopljenog kisika 5,0 mg L-1. Najduži proizvodni ciklus (77 dana) bio je u jesensko-zimskom roku uzgoja s najmanjom temperaturom zraka i hranjive otopine (14,2 i 15,2°C), najvećom relativnom vlagom zraka (73,5%) i količinom otopljenog kisika (6,9 mg L-1). Veća gustoća sjetve u prvoj, drugoj i trećoj berbi rezultirala je 17, 30 i 50% većim prinosom u odnosu na manju gustoću sjetve. Bez obzira na gustoću sjetve najveći udio u ukupnom prinosu (53%) ostvaren je u prvoj berbi, manji (29%) u drugoj i najmanji (18%) u trećoj.The research valued the effect of sowing density (6 i 9 g m-2) and multiple harvest (two and three occasions) to arugula yield of “Coltivata” variety in a floating hydroponic. The effect of abiotic factors was also monitored in a year-long cultivation in a protected space during three periods of cultivation (summer, autumn – winter and spring). During 339 days of research there were conducted 24 experiments, set by the method of of randmomized block design in four replicates. The observed abiotic factors (temperature, content of dissolved oxygen, pH- and EC- value) of nutrient solution were in the range: 12.4 to 26.1 °C, 3.6 to 8.1 mg L-1, 5.4 to 6.6 and 2.7 to 3.3 dS m-1. The lowest and highest temperature of the air were in the range from 5.3 to 18.0 °C and 16.4 to 45.1 °C, and relative air humidity 48.1 to 78.9 %. The shortest production cycle (36 days from sowing to the second harvest) was in the summer period of cultivation with average values of abiotic factors: air temperature and nutrient solution 28.1 and 25.3°C, relative air humidity 53.6% and content of dissolved oxygen 5.0 mg L-1. The longest production cycle (77 days) was in the autumn – winter period of cultivation with the lowest air temperature and nutrient solution (14.2 and 15.2°C), the highest relative air humidity (73.5%) and content of dissolved oxygen (6.9 mg L-1). Higher sowing density in the 1st, 2nd and 3rd harvest resulted in 17, 30 and 50% higher yield in comparison to lower sowing density. Regardless of sowing density, the highest share in total yield (53%) was achieved in the 1st harvest, lower (29%) in the 2nd and and the lowest (18%9 in the 3rd one

Water for all : Proceedings of the 7th international scientific and professional conference Water for all

The 7th International Scientific and Professional Conference Water for all is organized to honour the World Water Day by the Josip Juraj Strossmayer University of Osijek, European Hygienic Engineering & Design Group (EHEDG), Danube Parks, Croatian Food Agency, Croatian Water, Faculty of Food Technology Osijek, Faculty of Agriculture in Osijek, Faculty of Civil Engineering Osijek, Josip Juraj Strossmayer University of Osijek Department of Biology, Josip Juraj Strossmayer University of Osijek Department of Chemistry, Nature Park “Kopački rit”, Osijek- Baranja County, Public Health Institute of the Osijek- Baranja County and „Vodovod-Osijek“ -water supply company in Osijek. The topic of World Water Day 2017 was "Wastewater" emphasizing the importance and influence of wastewater treatments on global environment. The international scientific and professional conference Water for all is a gathering of scientists and experts in the field of water management, including chemists, biologists, civil and agriculture engineers, with a goal to remind people about the significance of fresh water and to promote an interdisciplinary approach and sustainability for fresh water resource management. The Conference has been held since 2011. About 300 scientists and engineers submitted 95 abstracts to the 7th International Scientific and Professional Conference Water for all, out of which 33 was presented orally and 62 as posters. 47 full papers were accepted by the Scientific Committee. 38 full papers became the part of the this Proceedings while 9 papers were accepted for publication in Croatian Journal of Food Science and Technology and Electronic Journal of the Faculty of Civil Engineering Osijek - e-GFOS