Over 2003-2005 at the Agricultural Experiment Station, Pawłowice, of the Wrocław University of Environmental and Life Sciences there were carried out experiments to evaluate the yielding of Persian clover and Westerwold ryegrass in pure stand and in mixtures depending on nitrogen fertilization. The yielding of these species was compared with the yielding of one-cut cereal-and legume mixture of triticale with pea, harvested at the triticale milk stage. The field emergence potential was lower, as compared with the planned sowing rate; it ranged from 41 to 77%. The three-year mean was from 5.62 (Westerwold ryegrass in pure stand) to 8.25 t of dry matter per ha (triticale and pea mixture). Nitrogen fertilization increased the dry matter yield, and the highest effect (a 63% increase) was recorded for Westerwold ryegrass in pure stand. The effectiveness of nitrogen fertilization of clover in pure stand and the mixture of triticale with pea was low and the yield increase ranged from 13 to 19%. The one-cut mixture of triticale with pea can be an alternative for annual papilionaceous and grass mixtures due to a higher yield of dry matter and lower harvest costs.

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