Mineral content of rocket depending on hydroponic system

Riga je jednogodišnja ili dvogodišnja zeljasta biljka iz porodice krstašica (Brassicaceae) skromnih zahtjeva prema uvjetima sredine. Brzorastuća je biljka kratkog uzgojnog ciklusa, porijeklom iz Mediterana. Intenzivna povrćarska proizvodnja u zaštićenim prostorima moguća je tijekom cijele godine, a primjena inertnih supstrata omogućava bolju kontrolu količine i vrste hranjivih tvari u hranjivim otopinama, naročito u zatvorenim sustavima. Cilj ovog diplomskog rada bio je utvrditi mineralni sastav rige u ovisnosti o hidroponskom načinu uzgoja. Istraživanje je provedeno tijekom proljeća 2016. godine, od početka travnja do kraja svibnja na pokušalištu Zavoda za povrćarstvo Agronomskog fakulteta u Zagrebu. Riga je uzgajana u dva tipa zatvorenih hidroponskih sustava: plutajući hidropon i hidropon plime i oseke koji su bili postavljeni u negrijanom zaštićenom prostoru, te konvencionalno na vrtnom tlu na otvorenom. Utvrđen je statistički opravdan utjecaj načina uzgoja na količinu makro i mikroelemenata (dušik, fosfor, kalij, kalcij, magnezij, željezo, cink, mangan i bakar), te na suhu tvar i prinos. Na temelju ostvarenih rezultata utvrđeno je da se uzgojem rige u plutajućem hidroponu ostvaruje veći prinos, dok je najveća količina suhe tvari ostvarena uzgojem u hidroponu plime i oseke.Garden rocket is an annual or biennial herbaceous plant from the family Brassicas (Brassicaceae) that has minimal requirements in terms of environment. It is a fast growing plant with a short term period of growing cycle, and it originates from Mediterranean. It is possible to do the intensive vegetable growing in protected areas during all seasons, and using biological substrates enable better control of quantity and quality of the nutrients in nutrient solutions. The aim of this master’s thesis is to determine mineral content of garden rocket, and how is it affected by hydroponics growing. The research was conducted on the experiment station owned by Department of vegetable growing, Faculty of Agriculture in Zagreb, from the beginning of April until the end of May, during the spring of 2016. For the research purposes, garden rocket was cultivated in two types of closed hydroponics growing systems – Floating hydroponic garden and Hydroponics ebb and flow low tide garden. Both systems were situated in non-heated protected areas. The units grown there were compared to the units that were simultaneously cultivated by conventional methods – in plain external garden. This research has statistically proven the benefits of hydroponics growing on the amount of macro and microelements (nitrogen, phosphorus, potassium, calcium, magnesium, iron, zinc, manganese and copper), amount of dry matter and the number of output units. Based on the outcome results it is determined that the growing of garden rocket in floating hydroponic garden achieves the large number of output units, and that growing of garden rocket in hydroponics ebb and flow low tide garden results in greatest amount of dry matter