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Biostimulating effect of l‐ tryptophan on the yield and chemical and microbiological quality of perennial ryegrass ( Lolium perenne ) herbage and silage for ruminant
Author(s) -
Przemieniecki Sebastian W,
Purwin Cezary,
Mastalerz Jędrzej,
Borsuk Marta,
Lipiński Krzysztof,
Kurowski Tomasz
Publication year - 2021
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.10999
Subject(s) - lolium perenne , silage , fermentation , tryptophan , chemistry , butyric acid , food science , zoology , lactic acid , forage , perennial plant , agronomy , biology , bacteria , amino acid , biochemistry , genetics
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. RESULTS The dose of 5 kg ha −1 had a significant effect on herbage yield, which increased by 15% compared to group C and approximated the value achieved in group C+. The treatment with l‐ TRP caused a significant increase in water‐soluble carbohydrate (WSC) content only in Tr5 (165 g kg −1 DM), which was reflected in a more beneficial course of fermentation, lower pH (4.59), and a higher sum of fermentation acids, including lactic acid (94.7 g kg −1 DM). Ryegrass treatment with a high l‐ TRP dose effectively reduced the loads of Clostridium spp. and fungi, and increased the count of Bacillus spp. The l‐ TRP significantly reduced N‐NH 3 content in Tr05 (98.6 g kg −1 TN) compared with C+ (123 g kg −1 TN) and butyric acid content in Tr05 (from 1.35 g kg −1 DM in the C to 0.38 g kg −1 DM). CONCLUSION The most effective dose turned out to be a dose of 5 kg ha −1 , which allowed a higher yield and a better fermentation course to be achieved. This work presents the feasibility of using l‐ TRP to optimize nutrient consumption by Lolium perenne and ultimately to affect the quality of its silage as a feedstuff. © 2020 Society of Chemical Industry