Table 3.
Effect of different additives on dry matter (g/kg FM), WSC (g/kg DM) and microbial counts (log10 cfu/g FM) of alfalfa silage during ensiling.
Items | Treatment | Storage period | SEM | P-value | |||||
---|---|---|---|---|---|---|---|---|---|
7 | 14 | 28 | 56 | T | S | T × S | |||
Dry matter | CK | 211cA | 209cAB | 207cAB | 201cB | 0.109 | 0.004 | 0.043 | 0.335 |
LP | 221b | 218b | 217b | 214b | |||||
S | 228ab | 225ab | 227a | 226a | |||||
LP + S | 230a | 229a | 228a | 229a | |||||
WSC | CK | 16.1bcA | 14.5abA | 12.3AB | 9.73B | 0.051 | 0.022 | 0.009 | 0.054 |
LP | 13.1cA | 12.4bAB | 11.4AB | 8.83B | |||||
S | 21.3aA | 17.2aB | 13.6BC | 11.2C | |||||
LP + S | 17.5abA | 14.4abAB | 11.1BC | 8.80C | |||||
LAB | CK | 8.29cA | 8.16AB | 8.09abAB | 7.90aB | 0.195 | 0.003 | 0.006 | 0.019 |
LP | 8.63bA | 8.23B | 8.11aBC | 7.89aC | |||||
S | 8.11cA | 8.02AB | 7.72bcB | 7.55bB | |||||
LP + S | 8.94aA | 8.06B | 7.59cC | 7.36bC | |||||
Clostridia | CK | 2.13aD | 2.57aC | 3.08aB | 3.64aA | 0.019 | 0.016 | 0.020 | 0.038 |
LP | 1.72bD | 2.11bC | 2.45bB | 2.80bA | |||||
S | 1.38c | 1.30c | < 1.30 | < 1.30 | |||||
LP + S | < 1.30 | < 1.30 | < 1.30 | < 1.30 | |||||
Enterobacteria | CK | 7.22aA | 5.69aB | 4.91aC | 4.17aD | 0.033 | 0.011 | 0.009 | 0.022 |
LP | 5.03bA | 4.37bB | 3.64bC | 3.05bD | |||||
S | < 2.40 | < 2.40 | < 2.40 | < 2.40 | |||||
LP + S | < 2.40 | < 2.40 | < 2.40 | < 2.40 |
a–d Means within a column with different superscripts differ (P < 0.05); A–EMeans within a raw with different superscripts differ (P < 0.05); LAB, lactic acid bacteria; LP, Lactobacillus plantarum; S, sucrose; LP + S, the addition of both sucrose and Lactobacillus plantarum; WSC, water soluble carbohydrates; DM, dry matter; FM, fresh matter; T: effect of treatment; S: effect of storage period; T × S: interaction between treatment and storage period; SEM, standard error of means.