Irrigation of spinach (Spinacia oleracea L.)

U diplomskom radu prikazana su morfološka svojstva špinata (Spinacia oleracea L.) te tehnologija uzgoja špinata s najvažnijim zahvatima: sjetva, gnojidba, zaštita, navodnjavanje i berba. Najveći naglasak je na navodnjavanju špinata u pogledu potrebe biljke za vodom u različitim fazama razvoja i vremenu sjetve, kvaliteti vode za navodnjavanje, sustavima za navodnjavanje te pozitivnim i negativnim učincima navodnjavanja na prinos i kvalitetu špinata. Prema dosadašnjim spoznajama špinat ima velike potrebe za vodom, prije svega zbog slabo razvijenog korijenovog sustava i njegovog rasprostiranja u površinskom sloju. U nedostatku vlage sporo se razvija, brzo stari i poslije formiranja 3 do 4 lista formira generativne organe. Na prinos i kvalitetu špinata značajno utječe kvaliteta vode za navodnjavanje (sadržaj soli) te izvor vode za navodnjavanje (tehnološka voda, čista pitka voda). Kvaliteta vode za navodnjavanje utječe i na sustav za navodnjavanje posebice ako je špinat navodnjavan metodom „kap po kap“ ili metodom kišenja koje su najčešće primjenjivane u uzgoju špinata.The aim of this thesis is to give an overview of morphological characteristics of spinach (Spinacia oleracea L.) as well as the spinach growing: planting, fertilization, plant protection and harvesting. The special attention is given to the spinach irrigation meaning the plant water needs regarding to time of planting and growing conditions, water quality, source of water and their impact on yield and quality of spinach. According to previously published research results spinach demands large amount of water because of the shallow root system which means that the soil water content near the soil surface should be near the field capacity. Stress caused by lack of water leads to slow plant growth and development of reproductive organs after growing the three to four leaves. The considerable influence on yield and quality of spinach has water quality (amount of salt) as well as the water source (waste water, fresh water. The water quality is also important for irrigation system since the most of the crop is irrigated with “drop by drop” or sprinkler system