| This study was designed to systematic assessment of the effect of non-starch polysaccharides (NSP) enzyme on avaliable energy and amino acids in corn and corn by-products for Chinese yellow-feathered broiler, and calculate the effective nutrition improvement value (ENIV).establishment of apparent metabolizable energy (AME) and true metabolizable energy (TME) prediction model for corn by-products. Laied the foundation for corn by-products and in the application of the actual formula and combined with the NSP enzyme.Experiments1:The determination of corn and16corn processing by-products, GE, DM, Ash, CP, EE, CF, NDF, ADF, of Ca, P and amino acid content.35healthy adult chinese yellow-feather roosters with BW2.5±0.2kg were randomly dividing into seven groups,Completely randomized experimental design, three metabolic test periods, every period had six treats,every treat had5repeat, every repeat had one cock, and one of these groups is endogenous treat.Using the Sibbald(1976) method for the determination of the nutrients utilization of corn and16kinds of corn by-products. The results show that a variety of nutrient content of the corn by-products were higher than corn,With different sources of the same kind materials, some indicators of a variety of nutrients have some differences. The corn fiber feed was minimum in energy metabolizability and metabolizable energy. Apparent and true metabolizable energy of three kinds of corn gluten meal and corn sugar residue than corn is high,others are lower than corn; amino acids Apparent and true availability of the highest in the CP%55corn gluten meal, the lowest were corn germ(not spray corn liquid), but all corn byproducts are lower than corn. Predict the energy equation for all ingredients:the AME=3.3221+0.7042GE-0.5213CF (R2=0.8939):the TME=25.6976+0.7425GE-0.4262CF-0.2522DM (R2=0.9194); Predict the energy equation for corn by-product classified in energy ingredients:AME=14.5607-0.4410CF (R2=0.8587), TME=16.4755-0.4788CF (R2=0.8709); Predict the energy equation for corn by-product classified in protein ingredients:AME=18.9870-0.2305NDF (R2=0.6550), TME=20.16-0.2284NDF(R2=0.6714) amino acid utilization rate in the same species from different sources is similar.Experiments2:35healthy adult chinese yellow-feather roosters with BW2.5±0.2kg were randomly dividing into seven groups,Completely randomized experimental design, three metabolic test periods, every period had six treats,every treat had5repeat, every repeat had one cock, and one of these groups is endogenous treat. Using the Sibbald(1976) method for the determination of the nutrients utilization of corn and16kinds of corn by-products.The results showed that:NSP enzymes are added, the corn fiber feed was minimum in energy metabolizability, CP55%corn gluten meal was maximum, and amino acids Apparent and true availability change between59.58%to85.99%and70.77%to99.29%. the effective utilization of nutrients in corn and its by-products are increased after adding enzyme.Experiments3:Calculated nutrients ENIV value of corn and16kinds of processing by-products on the basis of experiment one and two.The results showed that:the AME by0.82%-3.32%, TME by0.98%-2.94%, TME to improve the highest rate of corn gluten feed; apparent utilization of17kinds of raw materials, amino acids, enzyme increased the amplitude range of1.05%-4.43%, the true availability of amino acids improve the range of0.96%-3.52%.AME and TME ENIV value of corn and processed products were the range of0.19MJ/kg-0.25MJ/kg, the highest was corn gluten feed, the corn was lowest; amino acids ENIV value were range0.03g/kg-1.87g/kg, the highest was corn gluten meal. |
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