ANN 111: Principles of Animal Nutrition and Feed Technology (2+1)

BIOLOGICAL TREATMENT

• Growing cellulolytic microorganisms such as white rot fungi Trichoderma viridae, Trichoderma lignorum.

Growing mushrooms:

• Straw is steam treated, packed in polythene bags, inoculated with seed material of mushroom, bag when filled with mycelia slit open to allow fruiting, after harvesting of mushrooms the spent straw is used as feed.

Single cell protein production:

• Straw is hydrolysed, steam treated, treated with ammonia, inoculated with Candida utilis and incubated, after harvesting of SCP the spent straw is used as feed.

Enzyme treatment:

• Pretreatment of straw with lignase

Preparation of silage:

• Straw sprayed with water, additives such as molasses added and ensiled in a silo.
• Nitrogen content is increased by adding urea or poultry manure.
• The above treatments cause biodegradation of lignin and increases the digestibility of cellulose. They also increase the protein content of the straw.