Table 1 Primary and secondary screening of protease-producing lactic acid bacteria
Separation source | Strains number | Initial screening diameter (mm) ± SD | Re-screening protease activity (U/ml) ± SD |
|---|---|---|---|
Feces of healthy weaned piglets | P3 | 16.93 ± 0.23 | 16.24 ± 0.22 |
P8 | 20.03 ± 0.16 | 15.23 ± 0.15 | |
P12 | 16.40 ± 0.25 | 16.20 ± 0.32 | |
P13 | 15.60 ± 0.15 | 15.90 ± 0.18 | |
P14 | 17.86 ± 0.13 | 16.26 ± 0.32 | |
P15 | 24.10 ± 0.24 | 24.30 ± 0.14 | |
P22 | 15.40 ± 0.22 | 16.10 ± 0.24 | |
P24 | 23.60 ± 0.32 | 25.60 ± 0.22 | |
Alfalfa silage | ZZUPF92 | 18.40 ± 0.18 | 17.60 ± 0.24 |
ZZUPF94 | 22.10 ± 0.32 | 21.20 ± 0.16 | |
ZZUPF95 | 24.60 ± 0.17 | 27.40 ± .0.31 | |
ZZUPF145 | 21.30 ± 0.25 | 19.80 ± 0.25 | |
Corn silage | LAO49 | 19.20 ± 0.35 | 19.15 ± 0.24 |
LAO53 | 22.02 ± 0.18 | 19.40 ± 0.31 | |
LAO56 | 16.39 ± 0.21 | 21.30 ± 0.25 | |
LAO60 | 16.10 ± 0.20 | 16.20 ± 0.24 | |
LA066 | 16.30 ± 0.26 | 15.60 ± 0.18 | |
Wheat silage | MB56 | 18.03 ± 0.16 | 19.32 ± 0.11 |
MB66 | 18.13 ± 0.35 | 15.68 ± 0.09 | |
MB72 | 21.63 ± 0.18 | 17.52 ± 0.12 | |
MB73 | 18.36 ± 0.32 | 16.85 ± 0.42 | |
MB76 | 16.05 ± 0.19 | 16.21 ± 0.15 |