Influence of four water irrigation systems on morphological characteristics of the olive type Coratina on locality Novigrad

Maslina (Olea Europea L.) je mediteranska voćna vrsta koja se uzgaja u pravilu na plitkom skeletnom i heterogenom tlu. Nedostatak vode se gotovo uvijek javlja u razdoblju vegetativnog rasta i razvoja stoga je navodnjavanje neophodna agrotehnička mjera. Cilj završnog rada je utvrditi kako četiri različite prakse navodnjavanja utječu na morfološke karakteristike ploda. Poljski pokus je proveden u sklopu projekta „SAN - Smart Agriculture Network“ (SAN – KK.01.2.01.0100) na 24 stabla masline sorte „Coratina“ u 2020. godini na lokaciji Novigrad (Zadarska županija) po shemi slučajnog rasporeda u četiri varijante sa tri ponavljanja. Varijante su predstavljale praksu navodnjavanja: K - Kontrola stabla masline bez navodnjavanja u vegetaciji (0 L vode po stablu), T1 - proizvođačka praksa, T2 - SAN praksa, T3 - dodavanje vode do 100% izračunate evapotranspiracije. Statistička obrada provedena je jednosmjernom analizom varijance, a razlike između srednjih vrijednosti testirane su povratnim testom (Duncan) kako bi se utvrdio utjecaj navodnjavanja na morfološke karakteristike ploda. Pokazalo se da je povećanje vode dodane za navodnjavanje utjecalo na masu, duljinu i širinu ploda te udio pulpe u plodu. U uvjetima heterogenog i skeletnog tla navodnjavanje je nužna agrotehnička mjera u proizvodnji ploda za maslinovo ulje sorte Coratina na lokaciji Novigrad u Zadarskoj županiji.The olive (Olea europea L.) is a Mediterranean fruit species that is usually grown in shallow, skeletal soil. The irrigation of olive trees is a necessary agrotehnical intervention because the water deficit can occur almost every year during the vegetative growth. The main purpose of the paper is to determine how four different amounts of water during irrigation can impact the morphological characteristics of the fruit and pits. The field experiment was conducted as a part of the project „SAN - Smart Agriculture Network“(SAN- KK.01.2.01.0100) during the year 2020. The experiment was conducted on 24 Coratina olive trees in an orchard which is located in Novigrad (Zadar County). The orchard was drip-irrigated. Furthermore, there were four types of irrigation: K - Control trees without irrigation (0L water per tree), T1 - production practice, T2 – SAN practice, T3 - the addition of water to 100% of calculated evapotranspiration. Statistical data was performed with the one-way analysis of variance. At last, the experiment showed how the incorporation of extra water impacts the mass, length and width of the olive fruit