Effect of irrigation on growth and quality of tagetes (Tagetes patula L.)

U istraživanju je proučavan utjecaj obroka navodnjavana na rast i kvalitetu kadifice (Tagetes patula L.). Istraživanje je provedeno u stakleniku tvrtke '' Floreo d.o.o'' u Osijeku 2019. godine. Cilj rada bio je proučiti utjecaj obroka navodnjavanja na rast i kvalitetu kadifice u pogledu visine biljke, broja grana/biljci, broja cvjetova/biljci, mase suhih i svježih cvjetova, promjera cvijeta te svježe i suhe nadzemne mase. Nadalje je promatrana pojava prvih pupova te cvatnja po tretmanima navodnjavanja. Biljke su uzgojene u tresetnim kockama iz sjemena, a potom su presađene u posude sa supstratom. Istraživanje je postavljeno po slučajnom blok rasporedu u pet ponavljanja. Tretmani navodnjavanja su bili : a1 = 150 ml vode , a2 = 250 ml vode i a3 = 350 ml vode. Obzirom na to da su kadifice uzgojene u zatvorenom prostoru, navodnjavanje je bilo jedini izvor vode za biljku te nije bilo utjecaja oborina. Zabilježeno je linearno povećanje visine biljaka, broj cvjetova/biljci, promjera cvjetova/biljci, zelene nadzemne masa te mase svježeg i suhog cvijeta pri čemu su najveće vrijednosti izmjerene na tretmanu navodnjavanja s najvećim obrocima navodnjavanja (a3). Najveći broj grana/biljci je izmjeren na a2 tretmanu navodnjavanja (p<0,05) što je iznimka u ovom istraživanju. Statistički opravdano veća masa svježeg i suhog cvijeta te zelena nadzemna masa je zabilježena na a3 tretmanu navodnjavanja, odnosno na tretmanu s najvećim obrokom navodnjavanja. Nije uočena razlika u pojavi prvih pupova po tretmanima navodnjavanja premda su biljke na a2 i a3 tretmanu imale uočljivo krupnije cvjetove.The research was conducted in Osijek during growing season 2019, in the greenhouse of Floreo Ltd. The goal was to study the impact of irrigation treatment on the growth and quality of Marigold (Tagetes patula L.). Following parameters were studied: growth and quality of Marigold in terms of plant height, number of branches per plant, number of flowers per plant, dry and fresh flower weights, flower diameter and fresh and dry shoot weights. Marigold plants were grown from seeds in peat cubes and then were transplanted into substrate containers. The study was set up as randomized block system in five repetitions. The irrigation treatments were as follows: a1 - 150 ml of water, a2 - 250 ml of water and a3 - 350 ml of water. Because Marigolds were grown indoors, irrigation was the only source of water for the plant and there was no impact of precipitation. It was noticed the linear increase of plant height, flower number/plant, flower diameter/plant, fresh weight, fresh and dry flower weight, where the maximum values were recorded on irrigation treatment with the highest amount of irrigation water (a3). The maximum value for branches number/plant was recorded on a2 irrigation treatment what is the exception in this study. Irrigation treatment significantly (p