Mannanase,endo-1,4-â- CAS NO.37288-54-3

Anti-nutrient Effect of Mannan Mannan, the most widely distributed hemicellulose in plant feed materials, is a kind of non-starch polys…

 Anti-nutrient Effect of Mannan

 

Mannan, the most widely distributed hemicellulose in plant feed materials, is a kind of non-starch polysaccharide (NSP). It can be commonly found in plant feed, with high level in feed meals, particularly in soybean meals (Table 1).Even in some non-conventional cake meals, such as palm meals and coconut meals, higher contents of mannan have been determined (about 25% ~ 35%).

 

Table1 Contents of Mannan in conventional feed stuff

Feed stuff	Total mannan(%)	Feed stuff	Total mannan (%)
Soybean meal(44%)	1.5~1.8	Dehulled soybean meal(44%)	1.1~1.3
Palm meal	2.5~3.0	Rapeseed meal	0.48
Coconut meal	25~35	Cottonseed Meal	0.37
Sunflower meal	0.56	Peanut Meal	0.52
Sorghum	0.10	Wheat	0.11
Rice bran	0.33	Sesame meal	3~4

 

1. Interacting with intestinal lipid micelles and polysaccharide-protein complexes, thus reducing the absorption of nutrients.

2. Combining with digestive enzymes, bile salts, thus reducing the activity of digestive enzymes and affecting the digestion and absorption of fat, which result in the decrease of feed energy value.

3. Nutrients are enwrapped by mannan and hard to be digested; the chyme viscosity increases,

Thus destroying the intestinal micro-ecological balance and affecting the health of livestock and poultry.

4. Through interfering the insulin secretion and the generation of insulin-like growth factors, the absorption rate of dextrose in intestinal and the process of carbohydrate metabolism are degraded, thus reducing the energy value of feed.