Abstract:
In order to study the effect of delayed ensiling and
application of some organic acid-based additives on fermentation of corn
silage, chopped whole plant corn mixed with 4 different additives consist
propionic acid in addition to control treatment without any additive.
Additives were: 1-Propionic acid 2-Propionic acid (85%) + Formic acid
(15%) 3-Calcium propionate 4-Propionic acid (80%) + Formic acid (15%)
+ Ammonia (5%). 10 g kg-1dry matter of each additives mixed
with chopped corn forage in 2 different times (0.48 h). Silages were assessed
using method of appearance evaluation and method of DM, pH evaluation
CP, NDF, ADF, TVFA, WSC, aerobic stability and DM degradation each of
treatments were determined after 60 days. Silages that exposed to air
48 h, before ensiling had better appearance quality in Filg`s method and
whole additives in this experiment had good effect on appearance quality
compared with control group. All of silages containing buffered propionic
acid-based additive, in the method DM, pH evaluation, were good and very
good. These silages had lower pH than control (p<0.05). Amount of dry
matter of control silage which ensiled immediately was lower than other
treated silages. NDF in the silages (with Propionic acid (85%) + Formic
acid (15%)) was lower than the other silages and content of CP and TVFA
increased with addition of the additives especially additive containing
Propionic acid (85%) + Formic acid (15%) (p<0.05). WSC in treated silage
with additive containing propionic acid (85%) + Formic acid (15%) that
wilted 48 h before ensiling was more than other samples (p<0.05). Buffered
propionic acid-based additives caused to increase aerobic stability in
treated silages compared with untreated silages. Degradation of DM (in
situ) in untreated silages that delayed ensiled was lower. Application
of the additive containing propionic acid (80%) + Formic acid (15%) +Ammonia
(5%) resulted in highest degradation dry matter among experimental additives.
Generally, treating with propionic acid-based additives prevented degradation
DM decrease (in vitro).
S. Arbabi, T. Ghoorchi and S. Hasani, 2008. The Effect of Delayed Ensiling and Application of an Propionic Acid-Based Additives on the Nutrition Value of Corn Silage. Asian Journal of Animal Sciences, 2: 26-34.
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