EN
The grain quality of wheat is influenced by the protein and gluten content, which in turn depends on environmental conditions and cropping practices. A field study was carried out in 2000-2003 based on the static experiment at the Research Station Brody belonging to the Agricultural University of Poznań. Winter wheat (var. Sakwa) was grown in four-course crop rotation: pea, winter wheat, spring barley, winter triticale. The objective of this study was to determine the effects of tillage systems: conventional tillage, reduced tillage and direct seeding on the grain quality of winter wheat. The reduced tillage system and direct seeding were found to increase the 1000 grain weight and the test weight of winter wheat compared to conventional tillage. No differences due to tillage systems in germination capacity of winter wheat were observed. The tillage methods had marked effects on wheat quality Increased grain protein and wet gluten content were observed for reduced tillage and direct seeding as compared with those for conventional tillage. The highest grain protein and gluten content were observed in the driest and hot year studied. The tillage systems did not make any difference in grain protein yield. However, energy yield of winter wheat was higher for conventional tillage than for reduced and direct seeding systems.