Deficit irrigation method for reducing water use of grapevine

Abstract

Regulated deficit irrigation (RDI) is a water-saving irrigation method that is now undergoing extensive trials worldwide but novel for Serbia and other countries of South East European region. In order to asses the possible application of RDI method in climate conditions of South East European region, the experiments were carried out in vineyard (variety Riesling) and RDI plants received ca. 60% of the water that was applied to fully irrigated (FI) plants. Thus, the significant amount of water for irrigation was saved. Data concerning yield and the soluble solids in the berries did not showed significant differences between RDI and FI plants, while the titrable acidity and antioxidant activity in the berries and IWUE were significantly increased under RDI. Economic analyses was also done to asses the effect of RDI on profit of grape production.

Redukovano navodnjavanje (RDI) je metoda kojom se može uštedeti voda za navodnjavanje i koja se intenzivno upotrebljava u svetu, ali je nova za Srbiju i ostale zemlje Jugoistočne Evrope. U cilju ispitivanja mogućnosti primene ove metode u klimatskim uslovima Jugoistočne Evrope, organizovan je eksperiment u vinogradu (sa sortom Rizling) i u kome su RDN biljke bile zalivane sa 60% od količine vode punog navodnjavanja (FI). Rezultati su pokazali da se prinos i suva supstanca u bobicama nisu razlikovali između RDI i FI biljaka, dok je kiselost i antioksidativna aktivnost u bobicama, kao i efikasnost korišćenja vode (WUE) značajno porasla pod dejstvom RDI navodnjavanja. Ekonomska analiza je takođe urađena da bi se utvrdila profitabilnost proizvodnje u uslovima redukovanog navodnjavanja.