To make the precise application of corn by-products and non-starch polysaccharide (NSP) enzymes in animal feed formulation, 56 healthy adult yellow-feathered roosters with body weight of (2.5±0.2) kg were randomly divided into 7 groups and 8 replicates in each group and 1 rooster in each replicate. Three metabolic test periods were carried out by super-alimentation, the roosters were fed diets with a single raw material and the material with non-starch polysaccharide enzymes to determine the metabolizable energy and energy metabolizability of corn and corn by-products before and after adding NSP enzymes. The results showed that except three types of corn gluten meals and two types of corn sugar dregs, the apparent metabolizable energy(AME) and true metabolizable energy(TME) of other corn by-products were lower than those of corn. The prediction equations of corn and corn by-product were showed as follows: AME=3.322 1+0.704 2GE-0.521 3CF (R2=0.893 9), TME=25.697 6+0.742 5GE-0.426 2CF-0.252 2DM (R2=0.919 4). After NSP enzymes was added, apparent energy metabolizability and true energy metabolizability of corn germ (not gunited) were the lowest, and the highest one was corn gluten meal (crude protein 55%). And the enzyme addition increased the apparent energy metabolizability of corn and corn by-product by 0.82% to 3.32%, increased true energy metabolizability by 0.78% to 3.00%, increased AME by 0.82% to 3.30%, and increased TME by 0.98%～2.94%. The range of Effective nutrient improvement value (ENIV) of AME and TME of corn and corn by-products 0.19 to 0.25 MJ/kg, and the highest one was corn fiber feed, and the lowest one was corn. In conclusion, complex NSP enzymes can improve the energy utilization and efficiency of corn and corn by-products.
LIN Qian
,
WANG Zhaoqun
,
DAI Qiuzhong
,
JIANG Guitao
,
ZHANG Xu
,
WANG Xiangrong
,
ZHANG Jianhua
. Effects of Non-Starch Polysaccharide Enzymes on Energy Utilization of Corn By-Products[J]. Chinese Journal of Animal Nutrition, 2013
, 25(4)
: 833
-839
.
DOI: 10.3969/j.issn.1006-267x.2013.04.022
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