Feed restriction and dietary energy dilution as different ways for reducing fat deposition in broiler chicks

Abstract EN

The effect of feed restriction and energy dilution for reducing fat deposition in broiler chicks was evaluated using 300, Arbor Acres, 3 weeks old.

The procedure included five diets, two levels of feed restriction, 10 and 20%R, and two levels of energy dilution at 10% and 20% compared with the control group (ad libitum).

Chicks were randomly divided into five equal groups of 60 chicks each.

Each group was subdivided into 4 equal replicates.

Water was provided freely.

The control and diets 4 and 5 were offered at free choice feeding.

Dietary energy diluted by substitute 10 and 20% of the basal diet with fennel hay meal, which is considered as a high-fiber and low-energy feed.

The chicks (460 ±12g) were housed in wire floor batteries where feed and body weights were recorded at weekly intervals.

The experiment lasted for 4 weeks.

Results obtained showed that body gain, feed intake and feed conversion of chicks subjected to feed restriction were significantly decreased.

Whereas, diluting energy at levels 10% and 20% resulted in significant (P<0.05) decrease in body gain, while feed intake did not differ and feed conversion ratio significantly (P<0.01) increased as compared to the control group.

Concentrations of triglyceride significantly decreased (P<0.01), while cholesterol did not significantly affected for chicks fed restricted diets.

Concentrations of triglyceride and cholesterol significantly decreased (P<0.01) for chicks fed diluted energy diets.

The GOT and GPT enzymes activity significantly increased for chicks fed restricted diets.

GPT levels in plasma of chicks fed diluted energy diets significantly (P<0.01) increased as compared to the control group.

Ether extract contents of male chicks meat (without skin) significantly (P<0.01) decreased with feed restriction and dietary energy dilution.

The percentages of moisture, protein and ash of chick’s meat did not influence by dietary treatments.

Carcass traits revealed insignificant differences compared to the control.

The only exception is that of liver percent of chicks fed diluted energy diets and those fed restricted feed were significantly decreased as compared to the control group.

Restricting feed resulted in better economical efficiency values.

Diluting energy for broiler chicks reduced economical efficiency.

These results indicate that it can produce broilers meat with low fat content through feed restriction or energy dilution.

It may state that broiler diets could be restricted to 20% and energy could be diluted to 20% and producing low-fat meat.