Effect of dietary level of maize- and rye distiller dried grains with solubles on nutrient utilization and digesta viscosity in laying hens.

摘要

An experiment on 55 Lohman Brown hens to determine the effect of different dietary levels of maize- and rye distillers dried grains with solubles (mDDGS and rDDGS, respectively) on nutrient digestibility, content of metabolizable energy in the diet and balance of nitrogen, calcium, phosphorus and zinc was conducted. Experimental diets were isocaloric and isonitrogenous and contained 0, 5, 10, 15, or 20% mDDGS or rDDGS. Diets with 20% mDDGS or rDDGS were also supplemented with NSP-hydrolysing enzymes. Results revealed that 5, 10 or 15% mDDGS in a diet had no effect on apparent digestibility of nutrients, dietary metabolizable energy content, or balance of N, Ca and Zn. On the other hand, 20% mDDGS decreased the digestibility of crude fat and lowered the level of metabolizable energy in the diet, whereas 15 or 20% rDDGS negatively affected organic matter and crude fat digestibility and the dietary metabolizable energy level. A 15 or 20% inclusion of mDDGS or rDDGS showed a positive effect on phosphorus balance. Addition of feed enzymes increased nutrient utilization in diets containing 20% DDGS. It is suggested that high dietary level of DDGS decreases the nutrient digestibility and metabolizable energy content, but positively affects the phosphorus balance in laying hens.