Changes in the structural carbohydrates of corn stover silage added with yeast culture and fermented apple pomace

Abstract Text:

With the objective of improving the nutritional value of corn stover silage by adding yeast culture or solid-state fermented apple pomace, three treatments were evaluated during 28 d using 48 plastic bags as microsilos each 2 Kg of: (T1) corn stover alone; (T2) corn stover plus yeast culture (10% as feed basis) and (T3) corn stover plus fermented apple pomace (69% as feed basis). Treatments were added with water to obtain 35% (DM). Values for DM, pH, temperature (t), in vitro dry matter digestibility (IVDMD), NDF, ADF, cellulose and lignin were obtained at d 0, 7, 14 and 28 of ensiled time. Data were analyzed by PROC GLM of the SAS. Table 1, shows the values at 28 d of ensiled. The addition of yeast culture or fermented apple pomace decreased (P<0.01) the pH, increased (P<0.01) the temperature and the DM decreased (P<0.01) across the sampling time. The IVDMD was highest (P<0.01) with the addition of fermented apple pomace. NDF, ADF, cellulose and lignin concentrations decreased with the ensiled time; and the lowest values were shown in T2 and T3. We conclude that the addition of yeast culture or fermented apple pomace improved the nutritional value of silage corn stover.

Keywords: Yeast Culture, Fermentation, Silage

Table 1. Means of the structural carbohydrates of corn stover silage by adding yeast culture or solid-state fermented apple pomace at 28 days of ensiled.

Variables	T1	T2	T3
pH	5.18   ± 0.07b	4.73 ± 0.07c	5.32 ± 0.07a
Temperature (°C)	26.00 ± 0.49b	26.73 ±   0.5a	27.17 ±   0.49a
Dry   Matter (%)	37.85 ±   0.44a	30.68 ±   0.44c	35.56 ±   0.44b
In vitro Dry Matter Digestibility (%)	48.09 ±   0.34c	52.10 ±   0.34b	56.06 ±   0.34a
NDF   (%)	82.76 ± 1.14a	77.10 ± 1.14c	80.56 ±   1.14b
ADF   (%)	65.01   ± 0.58a	59.44 ± 0.58c	62.33 ± 0.58b
Cellulose   (%)	57.24 ± 0.77a	54.30 ± 0.77b	55.05   ± 0.77b
Lignin   (%)	7.0 ± 0.48a	3.0 ± 0.48b	2.3 ± 0.48b

^{a, b, c,} Means with literal different between columns indicate statistical difference (P< 0.05)