The lifetime egg production capacity of laying hens (ie laying persistency) has increased
tremendously in the last 50 years from 220 eggs in 1960 to 500 eggs in 2019. To improve …

Initial weight (g) Final weight (g) Weight gain (g) Feed intake (g/day) Feed conversion ratio
Mortality () Uniformity () complex chemical synthetic process, and the starting ma- of …

The objective of this study was to determine the effects of dietary crude protein (CP) levels
on production performance, nitrogen balance, and odor emission of excreta in growing …

This study was carried out to assess the effects of different levels of sanguinarine on
antioxidant indices, immunological responses, serum biochemical parameters, ileal …

This study was conducted to evaluate the effects of supplementing methionine (Met) in a low-
protein (Low-CP) diet during d 11 to 24 and subsequently feeding with a low-metabolizable …

Threonine (Thr) may be a limiting amino acid for laying hens fed diets with lowered protein
level. An experiment was conducted to examine laying performance, and the intestinal …

Isoleucine may be a limiting amino acid for laying hens fed diets with a lowered protein
level. An experiment was conducted to examine laying performance and the immune …

An experiment was conducted to determine whether, by using a low-protein amino acid-
supplemented diet, the health status, stress response, and excreta quality could be …

This study was aimed at studying use of reduced dietary crude protein (CP) level
supplemented with additional amino acids in laying ducks. A total of 720 Jingjiang ducks (50 …

The objectives of the present study were (1) to determine the extent to which the crude
protein (CP) content of laying hen diets can be reduced, based on performance criteria, and …