Efekti primene tifon uređaja u navodnjavanju kukuruza (Zea mays L.)

The aim of this study was to use results of experimental work to analyse effects of maize irrigation and to quantify basic parameters that are included into exploitation costs of a long–ranged self–propelled sprayer, so called typhoon sprinkler. The four–replicate trial was carried out according to a randomised block design in the experimental fields of the Maize Research Institute, Zemun Polje, during the 2002–2008 period. The irrigation was applied in all years but 2004 in which the precipitation sum was sufficient to maintain soil moisture above the predetermined pre–watering soil moisture. According to obtained results, effects of irrigation on grain yields over years varied from to 0.315 t ha-1 to 4.459 t ha-1. Furthermore, the input to output ratio varied over years. The long–term average shows that each tonne of a yield obtained by irrigation was loaded by consumed energy of 328 kWh used for the operation of a submersible pump that supplied the typhoon sprinkler with a necessary water amount (555m3) from a deep well, then with approximately 2 l of fuel necessary for the tractor operation and with 17 hours of labour.Cilj rada je bio da se na osnovu rezultata eksperimentalnog rada izvrši analiza efekata primene navodnjavanja kukuruza i kvantifikuju osnovni parametri koji učestvuju u strukturi troškova eksploatacije samohodnog rasprskivača velikog dometa tzv. tifon uređaji. Ogled je izveden u periodu 2002–2008, po metodi slučajnog blok sistema u četiri ponavljanja, na eksperimentalnom polju za navodnjavanje Instituta za kukuruz "Zemun Polje". U svim godinama je navodnjavano osim u 2004. godini, kada su padavine bile zadovoljavajuće za održavnje vlage iznad nivoa predviđene predzalivne vlažnosti zemljišta. Rezultati pokazuju da je po godinama proučavanja ostvaren različiti efekat navodnjavanja, od 0,315 t ha-1 do 4,459 t ha-1. Takođe, zavisno od godine bio je različit odnos input–a i output–a. U višegodišnjem proseku, svaka tona prinosa dobijena dejstvom faktora navodnjavanja bila opterećena utrošenom energijom od 328 kWh za rad podvodne pumpe, koja je snabdevala tifon uređaj potrebnom količinom vode (500 m3) iz dubinskog bunara, zatim sa oko 2 litre goriva za angažovanje traktora i sa približno 17 časova ljudskog rada