02604nab a2200313 i 4500003000900000005001700009008004100026040001800067072001400085100002800099100002400127100004500151100003300196100002800229100002700257100003100284245010700315500007000422520143200492650002401924650001201948650002001960650001401980650002001994773017102014856007802185942000802263999001902271BR-BrBNA20250408141909.0250408b2020    bl.ar|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aQ52b8952  aSchwingel, Alice Watte   aFernandes, Tatiane   aOrrico Junior, Marco Antonio Previdelli   aOrrico, Ana Carolina Amorim   aLucas Junior, Jorge de   aReis, Ricardo Andrade   aSouza, Ronaldo Omizolo de   aThe quality of crude glycerine influences the fermentation and nutritive value of Piatã grass silage  aPublicação on-line; 29 ref.; 2 illus; 3 tables; Sumaries (En)  a

ABSTRACT - We aimed to evaluate the effects of crude glycerine purity and levels of glycerol on the fermentative profile, microorganisms counting, and nutritional value of Piatã grass silage. The experiment was carried out in a 3×3+1 completely randomized factorial design using three different types of crude glycerine [low purity (40% of glycerol), medium purity (60% glycerol), and high purity (80% glycerol)], three doses of glycerol (20, 40, and 60 g/kg DM), and a control (no crude glycerine added) as an additional treatment, which were stored for 80 days. Statistical differences were not observed on fermentative losses of the treatments tested. The increase of glycerol doses resulted in higher levels of non-fibrous carbohydrates and lower levels of fibre components. The addition of low-purity crude glycerine increased the levels of fat and in vitro digestibility of silages. The highest levels of lactic acid and acetic acid occurred in the treatments with 60 g/kg of glycerol when using crude glycerine with a low purity. The lowest lactic acid content was observed in the control treatment and in the lowest dose of glycerol. The highest glycerol dose (60 g/kg), associated with the lowest degree of crude glycerine purity (40%) resulted in the greatest nutritional value and provided the best silage conservation.

Keywords: byproduct of biodiesel, fermentation profile, forage conservation, ruminant feed  aGRAMÍNEA TROPICAL  aSILAGEM  aFERMENTAÇÃO  aGLICERINA  aVALOR NUTRITIVO0 035459317600dViçosa-MG Sociedade Brasileira de Zootecnia  1997o2024-4310tRevista Brasileira de Zootecnia (Brazil)x1516-3598gv. 49 p. 1-11; (2020)wBR2025000529  uhttps://www.scielo.br/j/rbz/a/d4wmZVhM7zDCM7GxVb9Jxgn/?format=pdf&lang=en  cANA  c330915d330915