Does the gradual replacement of spent silkworm (Bombyx mori) pupae affect the performance, blood metabolites and gut functions in White Leghorn laying hens?

Abstract

Spent silkworm pupa is a valuable source of alternative protein in poultry production. Usually the spent silkworm pupae are wasted and may cause environmental pollution and off smell. This feeding experiment was performed to determine the gradual increase of silkworm substitution of soybean on the egg production performance, serum biochemistry and intestinal histological features of White Leghorns laying hens. For this purpose, a total of 250 White Leghorn laying hens were allocated to five experimental treatments. Rations were prepared in which soybean meal was replaced with 0, 25, 50, 75 and 100% substitution with silkworm meal. The outcomes of the study indicated that performance was not significantly (P < .05) different among the experimental groups. Aspartate aminotransferase (AST) and alanine aminotrasferase (ALT), uric acid and creatinin concentration did not significantly (P > .05) alter among the groups during the experimental period. Similarly, height and thickness of intestinal villi, surface of intestinal villi, number of goblet cells did not change between the control and experimental groups. It was concluded that substitution of silkworm meal with soybean meal had no hostile effect on production performance, intestinal histomorphology and blood biochemical functions of liver and kidney in White Leghorn hens.