| Abstract | Istraživanje je provedeno na lokalitetu općine Petrijevci tijekom 2020. godine. Poljsko istraživanje je postavljeno kao dvočimbenični pokus prema split-plot metodi u tri ponavljanja. Prvi čimbenik u istraživanju je bilo navodnjavanje: a1 = navodnjavano i a2 = nenavodnjavano. Kukuruz je navodnjavan površinskom metodom, pomoću brazdi, a trenutak početka navodnjavanja je određen mjerenjem sadržaja vode u tlu. Drugi čimbenik (b) u istraživanju je predstavljao hibrid kukuruza: b1 = OSSK515 i b2 = P0216. Cilj istraživanja je bio proučiti utjecaj navodnjavanja te hibrida kukuruza na prinos i komponente prinosa hibrida kukuruza: visinu biljaka do klipa (VK) i metlice (VM), promjer klipa (PK), masu klipa (MK), duljinu klipa (DK), broj zrna po klipu (BZ/K), masu zrna po klipu (MZ/K), hektolitarsku masu (HM) i vlagu zrna (VZ). Prinos zrna kukuruza je bio značajno viši (p<0,05) na navodnjavanom tretmanu (16,44 t/ha) te kod b2 hibrida (15,12 t/ha). Kod hibrida b2 je zabilježena značajno (p<0,01) veća MK (291,3 g) u odnosu na b1 hibrid (205,2 g). MZ/K (b1 = 182,09 g, b2 = 297,8 g) i HM (b1 = 66,55 kg/hl, b2 = 70,87 kg/hl). Na a1b2 tretmanu je MK bila za 29 % veća u odnosu na a1b1 te za 58,8 % na a2b2 u odnosu na a2b1 tretman. VZ na navodnjavanom tretmanu je bila značajno veća (p<0,01) u odnosu na ne navodnjavani tretman (a1 = 11,2 %. a2 = 10,34 %). Značajno veća (p<0,05) VK (a1 = 114,92 cm, a2 = 99,63 cm) i VM (a1 =181,26 cm, a2 = 159,42 cm) je zabilježena na a1 tretmanu navodnjavanja. Učinkovitost navodnjavanja (UN) na a1 tretmanu je bila 280 %. Učinkovitost norme navodnjavanja (UNN) na a1 tretmanu navodnjavanja je bila 17,75 kg ha-1/mm. Na a1 tretmanu učinkovitost vode (UV) je bila 4,59 kg za svaki utrošen mm u procesu ETo. Na a2 tretmanu UV je bila 3,2 kg/mm. |
| Abstract (english) | The field study was conducted in Petrijevci during maize growing season 2020 as a two-factor study, split-plot method in three replicates. The main study factor was irrigation treatment: a1 = irrigated, a2 = rainfed. Maize crop was irrigated with furrows, while the irrigation time was determined with tensiometers. Two maize hybrids from the similar maturity groups were used in the study: b1 = OSSK515 and b2 = P0216. The goal was to study the impact of irrigation and hybrid on maize grain yield (GY) and following yield components: tassel hight (TH), ear height (EH), cob diameter (CD), cob weight (CW), cob lenght (CL), grain number per cob (GN/C), hectoliter weight (HW), grain weight per cob (GW/C) and grain moisture (GM). Significantly higher (p<0.05) GY was measured on irrigated plots (16.44 t ha-1) and b2 hybrid (15.12 t ha-1). Significantly higher (p<0.01) CW (b1 = 205.2 g, b2 = 291.3), GW/C (b1 = 182.09 g, b2 = 297.8 g), and HW (b1 = 66.55 kg/hl, b2 = 70.87 kg/hl) were recorded for b2. As for the interaction, CW in a1b2 treatment was 29% higher compared to a1b1, and 58.8% higher on a2b2 treatment compared to a2b1. GM (a1 = 11.2%, a2 = 10.3%) was higher on p<0.01 level, while EH (a1 = 114.92 cm, a2 = 99.63 cm) and TH (a1 =181.26 cm, a2 = 159.42 cm) were higer on p<0.05 level of significance on irrigated plot. Irrigation efficiency was 280%, irrigation water use efficiency 17.75 kg ha-1 mm-1. Water use efficiency ranged from 3.2 kg/mm (a2) to 4.59 kg/mm (a1). |
