POST-HARVEST RESIDUES OF NARROW-LEAVED LUPIN (Lupinus angustifolius L.)/SPRING RYE (Secale cereal L.) MIXTURES AS A SOURCE OF BIOLOGICAL NITROGEN FOR WINTER TRITICALE (Triticosecale Wittm. ex A. Camus)

Field research was conducted in 2010-2012 to determine the manuring value of the post-harvest residues of narrow-leafed lupin (Lupinus angustifolius L.)/spring rye (Secale cereal L.) mixtures. The following two experimental factors were investigated: 1. forecrop - mixtures: narrow-leafed lupin pure stand 100%, spring rye - pure stand 100%, narrow-leafed lupin 75% + spring rye 25%, narrow-leafed lupin 50% + spring rye 50%, narrow-leafed lupin 25% + spring rye 7 5%; 11. forecrop harvest date: narrow-leafed lupin flowering stage, flat green pod stage. It was inferred, based on the obtained results, that the greatest quantity of post-harvest residues wassupplied by spring rye as well as narrow-leafed lupin/spring rye mixtures containing 25 + 75% and 50 + 50% of the respective components, harvested at the stage of flat green pod of narrow-leafed lupin, the greatest nitrogen amount being supplied by narrowleafed lupin harvested at the aforementioned development stage. The highest grain yield was produced by winter triticale (Triticosecale Wittm.ex A.Camus) following an incorporation of the post-harvest residues of narrow-leafed lupin/spring rye mixture containing 50 + 50% of the respective components and harvested at the stage of narrow-leafed lupin flat green pod.