RESEARCH REGARDING OF THE IRRIGATION INFLUENCE ON SUGAR BEET CROP IN THE CRISURILOR PLAIN CONDITIONS

The paper presents the results researches carried out during 1976-2014 in the research field for soil water balance study from Agricultural Research and Development Station Oradea. On the watering depth (0-75 cm) the soil water reserve was maintained between easily available water content and field capacity and the average of the irrigation rate used were of 2655 m 3 /ha. The irrigation determined the improve of the microclimate conditions (water/temperature+light report; wet I in comparison with median wet) the increase of the daily water consumption and finally of the total water consumption with 49.7%. The irrigation determined the yield gains very significant every year; the relative differences in comparison with unirrigated variant were of 60.5%, variation interval 9-227%; the yield stabilities were improved, standard deviation decreased with 25.1%. The irrigation determined the increase of the yield quantity obtained for 1 m 3 of water used with 7%. The results research sustain the irrigation opportunity