Biostimulating effect of l-tryptophan on the yield and chemical and microbiological quality of perennial ryegrass (Lolium perenne) herbage and silage for ruminant

摘要

BACKGROUND This study aimed to evaluate the effect of l-tryptophan (l-TRP) used in the cultivation of Lolium perenne on the yield, and chemical and microbiological quality of its herbage and silage. l-Tryptophan was applied in doses of 5, 0.5, 0.05 kg ha(-1). The experiment was conducted with a control group (C) and a comparative control group (C+) with higher nitrogen fertilization.