Compound premix for laying hens at laying stage used for formulating low-protein-content diet and application thereof

The invention provides a compound premix for laying hens at peak laying stage used for formulating low-protein-content diet. The compound premix for the laying hens at peak laying stage used for formulating the low-protein-content diet comprises the following ingredients: vitamins, trace elements, amino acids, phytase, stone powder, calcium hydrogen phosphate, microecological additives and so on. Based on an ideal amino acid model of the laying hens, amino acid monomers are supplemented so as to improve the utilization rate of soybean meal protein, as well as reduce the use proportion of the soybean meal in a full-price feed. Animal tests have proven that no significant differences have been observed for the production performances, namely egg weight, egg yield rate and egg-feed ratio of the laying hens fed with the full-price diet formulated by using the premix and the laying hens fed with conventional crude-protein-level diet; moreover, the nitrogen emission in faeces is obviously reduced, so that the chick