Enzyme assisted ensiling of alfalfa with enzymes by solid substrate fermentation

Area of Science:

• Agricultural Science
• Enzymology
• Microbiology

Background:

• Alfalfa silage quality is crucial for livestock nutrition.
• Enzyme additives can enhance silage fermentation and aerobic stability.
• Solid substrate fermentation (SSF) offers a method for enzyme production.

Purpose of the Study:

• To evaluate the efficacy of a crude enzyme preparation from Gliocladium spp. for improving alfalfa silage.
• To compare the performance of the crude enzyme with commercial enzyme preparations.
• To assess the cost-effectiveness of the crude enzyme preparation.

Main Methods:

• Solid substrate fermentation (SSF) was used to produce a crude enzyme from Gliocladium spp.
• The crude enzyme was added to alfalfa at a 5% level.
• Alfalfa silages were analyzed for fermentation characteristics and stability.
• Commercial enzymes (Celluclast 1.5 L, Viscozyme 120 L) were used as benchmarks.

Main Results:

• The crude enzyme preparation significantly improved alfalfa silage fermentation characteristics.
• Silage stability was enhanced by the crude enzyme, comparable to commercial preparations.
• The crude enzyme preparation demonstrated effectiveness at a 5% inclusion level.
• Commercial enzymes were effective at a 0.025% inclusion level.

Conclusions:

• Crude enzyme preparations from Gliocladium spp. via SSF are effective silage additives.
• This enzyme offers a viable, cost-effective alternative to commercial enzyme products for alfalfa silage.
• Further research into optimizing SSF for enzyme production could yield significant economic benefits.