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Effects of different additives on fermentation quality and aerobic stability of Leymus chinensis silage
Author(s) -
Zhang Q.,
Yu Z.,
Na R. S.
Publication year - 2018
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/gfs.12301
Subject(s) - butyric acid , chemistry , lactobacillus buchneri , silage , food science , fermentation , acetic acid , lactic acid , zoology , formic acid , lactobacillus plantarum , biochemistry , biology , bacteria , genetics
This study investigated the effects of different additives on fermentation quality and aerobic stability of Leymus chinensis silage. Treatments included (i) no additive, (ii) 3 mL kg −1 formic acid ( FA ), (iii) 6 mL kg −1 FA , (iv) 5 mL kg −1 acetic acid ( AA ), (v) 10 mL kg −1 AA , (vi) 2 mL kg −1 propionic acid ( PA ), (vii) 4 mL kg −1 PA , (viii) 5 mL kg −1 butyric acid ( BA ), (ix) 10 mL kg −1 BA , (x) 1.0 g kg −1 potassium sorbate ( PS ), (xi) 1.0 g kg −1 sodium benzoate ( SB ), (xii) 1 × 10 8 colony‐forming units (cfu) kg −1 Lactobacillus (Lb) plantarum LP ( LP ), (xiii) 1 × 10 8 cfu kg −1 Lb. brevis LB ( LB ) and (xiv) 1 × 10 8 cfu kg −1 Lb. buchneri NCIMB 40788 (Fresh). Each additive treatment was based on fresh matter ( FM ). Results showed that all additives decreased pH values. All additives except Fresh decreased ammonia‐N content ( p < .001). Both LP and LB increased lactic acid content ( p < .001). Butyric acid content increased with FA (3 mL kg −1 ) and BA , but decreased with PA , PS , SB , FA (6 mL kg −1 ), AA , LP , LB ( p < .001). FA (3 mL kg −1 ), AA (10 mL kg −1 ), PA , BA , PS , SB and Fresh improved aerobic stability ( p < .001). After 8 days exposure to air, the pH value and yeast count were lower in FA (3 mL kg −1 ), BA (10 mL kg −1 ), SB treatments than in other treatments. Overall, AA outperformed all other additives in improving fermentation quality. Sodium benzoate and AA could be used as an effective additive to improve aerobic stability of L. chinensis silage.