By analyzing the evolution of rainfall last year, it concludes that summers are becoming increasingly droughty and the extreme weather is causing large losses of agriculture production. To limit the adverse effects of these phenomena, researchers permanently are studying alternatives and new tehnologies and their application in a reasonably and efficient manner. The evaluation of water requirements for crops is related to evapotranspiration potential (ETP), wich is the water consumption of the ground covered by a carpet of perennial herbs, water supplied to the field capacity. Optimal real evapotranspiration (ETRO) represents water consumption for plants, consumption, wich provides higher economically efficient harvests. In the paper was determined monthly and annual potential evapotranspiration, also it was compiled a hydroclimatic balance and balance curves for the years included in the study, comparing the average of monthly, annual temperature and precipitation with normal areas. Also, the water consumption of grain maize culture (ETRO) in Arad for 2016 and 2017 was determined by indirect methods, namely the Thornthwaite method, the most used method for the conditions in our country, and the Lawry Jhonson method dispatch and extremely fast. The monthly, annual and daily average consumption of corn crops were determined using these methods during the two years studied. The total water consumption of the corn crop in the Arad area was 5272 mc/ ha, representing an average value on the two methods studied in 2016. The total water consumption of maize in 2017 was lower compared to the one in 2016, (4,116 mc/ ha) the year being a droughty year with high air temperature compared to the normal area. The highest water consumption was in the June, July and August warm months, and the lowest monthly water consumption to maize was recorded in April and September. The rainfall coverage of water consumption of corn crops was 79% in 2016 and 74% in 2017, resulting in a water demand of 1300 mc/ha in 2016 and 1500 mc/ha in 2017, which it should be supplemented by irrigations.

corn crops, total water consumption, monthly consumption, water requirements

field crops and pastures

Presentation: poster