Summary:

The influence of sprinkling irrigation and four nitrogen fertilization doses on the height and quality of grain yield of malting spring barley cultivar Poldek was determined in a field experiment carried out in the years 2006-2008 on light soil at Mochelek, near Bydgoszcz. Total water doses of 90, 30 and 180 mm were used in succeeded vegetation seasons respectively to weather conditions. The sprinkling irrigation of malting barley Poldek significantly increased the grain yield to the average amount of 2,24 t.ha^-1 (71,3%). Productive efficiency of applied water was higher comparing to results obtained from domestic experiments car-ried on in the comparable soil conditions. Irrigation also improved the brewery utilization indexes. Grain harvested on irrigated plots have less protein in the contents, higher uniformity and germination capacity than grain harvested as a control. Nitrogen fertilization significantly increased the grain yield but worsened its quality for malting utility. Obtained results indicate that the irrigation is one of the main impacts that provide high and good quality grain yield of malting barley in vegetation seasons characterised by low precipitation which causes dry spells in May, June and July