网络首发时间：2022-03-14 11:52:02 网络首发地址：. ch group and 12 chickens in each replicate, and 3 × 3 two factor design was adopted. The diet types were corn-soybean meal, corn-soybean meal-cotton meal and corn-soybean-peanut meal diets, and the protein levels were %, % and %. The results showed that reducing dietary protein level had no significant effects on production performance, egg quality, apparent nutrient digestibility, serum total protein, urea nitrogen and uric acid content (P>). Corn-soybean-cotton meal and corn-soybean-peanut meal diets had no significant effect on production performance, egg quality, apparent digestibility and serum biochemical indexes (P>). The interaction of diet type and protein level had no significant effect on egg quality and apparent digestibility of nutrients (P>). Except for group 4 and group 5, the economic benefits of each experimental group were higher than those of the control group. The experiment indicates that the adaptive group are corn-soybean meal + protein level of %, corn- soybean meal-cotton meal + protein level of %, corn-soybean meal-peanut meal + protein level of %. Key words: laying hens; low protein; miscellaneous meal; digest
